The History of Arc Welding: A Complete Timeline From 1881 to Modern Innovations

In 1941, a naval engineer named Russell Meredith huddled over a magnesium aircraft part that everyone said could not be welded—and in doing so saved the American war effort from a critical bottleneck. That single fix, born of desperation, became the Heliarc process we still call TIG welding today. The story of arc welding is full of moments like this: a spark, a problem, and a leap that changed how the modern world gets built.

Introduction: Why the History of Arc Welding Matters More Than You Think

The car you drove this morning. The bridge you crossed on the way to work. The steel frame of the chair you’re sitting in right now. None of those things hold together by accident, and none of them were hammered into shape by a blacksmith. They hold because someone fused metal to metal with an electric arc. Nearly everything built from cars and bridges to pipelines and skyscrapers depends on arc welding technology invented in the last 145 years — a technology that did not exist in any practical form before 1881, when Auguste de Méritens and Nikolai Benardos began experimenting with carbon arcs at the Cabot Laboratory in France.

That’s a startling thought the first time you sit with it. The modern world is, in a very literal sense, welded together, and the whole story fits inside a span of time shorter than a single human lifetime multiplied by two.

So What Exactly Is Arc Welding?

In plain language: arc welding is the process of joining two or more pieces of metal by melting them together using heat from an electric arc. An arc is a continuous electrical discharge that jumps between an electrode and the workpiece. Because that discharge concentrates an enormous amount of energy into a very small point, the metal at the joint turns to liquid, flows together, and solidifies into a single continuous piece once the arc moves on.

Add a filler metal, control the atmosphere around the molten puddle, and keep everything steady with a skilled hand, and you get a joint that can be stronger than the surrounding material. That last part is what makes welding different from gluing, bolting, or riveting: you are not attaching two things, you are making them one thing again.

What Readers Actually Want From This Article

Most people searching for the history of arc welding want three specific things: a clear timeline they can follow from start to finish, the names of the key inventors and what each of them actually contributed, and a plain explanation of how the major processes evolved — shielded metal arc welding (SMAW, or stick), gas tungsten arc welding (GTAW, or TIG), gas metal arc welding (GMAW, or MIG), submerged arc welding (SAW), and friction stir welding (FSW). This article delivers all three, in order, with dates, patents, and the real-world pressures behind each breakthrough.

You won’t find filler here. Every section answers a question a real welder, engineering student, or curious hobbyist actually asks.

Why Welders, Engineers, and Hobbyists Should Care

For working welders, history explains the “why” behind the code books and the rod boxes. Understanding that coated electrodes were invented to solve porosity and brittleness, for example, makes the numbers on a electrode classification far easier to reason about instead of memorize. If you’re just starting out, knowing which processes were built for speed and which were built for precision tells you what to learn first and what to grow into.

For engineers and designers, the timeline is a reminder that every process has a birth problem it was built to solve, and those original constraints still govern where each process is appropriate today. And for hobbyists and home-shop builders, the history is genuinely practical: the same shielding and safety logic that protects a pipeline welder applies in your garage, which is why guides like welding PPE and MIG welder setup matter long before you strike an arc.

The scale of the trade puts it in perspective. According to the U.S. Bureau of Labor Statistics Occupational Outlook Handbook, welders, cutters, solderers, and brazers held roughly 437,700 jobs in 2025, with a median annual wage of $53,750. That is a workforce built entirely on inventions that are, historically speaking, brand new.

How This Article Is Structured

We start before electricity, with forge welding and the ancient roots of joining metal. Then we move into the founding era of arc welding from 1881 to 1890, follow the technology through World War I and the arrival of stick welding, and tackle the 1920s and 1930s battle against atmospheric contamination. World War II gets its own section, because nothing compressed innovation like that war — it gave us Heliarc, which became TIG. From there we cover plasma, laser, electron beam, and friction stir welding, compare the major modern processes side by side, separate a few popular myths from the facts, and close with the people whose eyes, hands, and lungs made all of it possible.

The modern arc welding story begins in 1881. Everything you’re about to read follows from that spark — including the part where a stubborn engineer proved that everyone else was wrong.

Before the Arc: Forge Welding and the Ancient Roots of Joining Metal

Long before anyone dreamed of a welding machine, a blacksmith with a hammer and a coal fire was doing work that still holds up today. Forge welding—hammering two pieces of red-hot metal together until they fuse—was humanity’s original welding process, and it ruled the trade for thousands of years. Understanding what that method could and couldn’t do explains exactly why inventors spent a century hunting for something better, and why the electric arc finally won.

Thousands of Years of Fire, Hammer, and Skill

The earliest known metal joins trace back to the Bronze Age and the Iron Age, when smiths in Egypt, the Middle East, and Asia discovered that metals could be made soft enough with heat to be beaten into a single piece. A skilled forge welder would heat the two pieces in a charcoal forge, sprinkle a flux like borax or silica over the joint to scrape away oxide scale, then strike the glowing metal rapidly on an anvil. Done right, the crystal structures interlocked and the pieces became one.

This was genuinely impressive work. Wrought iron bridges, sword blades, hinges, and tools built with forge welding have survived for centuries. But the method had hard limits that no amount of skill could fully beat:

• Not every metal would cooperate. Forge welding worked beautifully for wrought iron and low-carbon steel, but cast iron, high-carbon steels, and most nonferrous metals either refused to fuse or cracked under the hammer.
• Heat control was guesswork. A smith judged temperature by color. Too cool, and the pieces wouldn’t bond; too hot, and the metal burned or oxidized beyond saving.
• It demanded mastery. A good forge weld took years to learn. That’s why why even today’s beginners ask whether welding is hard—the craft has always rewarded patience.
• Scale and precision were capped. You could not forge-weld a submarine hull or a seamless pipe. The hammer and anvil simply had no way to reach.

By the 19th century, the Industrial Revolution was demanding stronger bridges, boilers, locomotives, and ships—and forge welding was becoming the bottleneck. Inventors needed a heat source that was hotter, more concentrated, and more controllable than any forge fire, and it needed to come from somewhere no one had thought to look: electricity.

Humphry Davy Strikes the First Arc

That breakthrough arrived in 1800, when English chemist Sir Humphry Davy demonstrated something astonishing using a battery of voltaic cells: by touching two carbon electrodes together and pulling them slightly apart, he produced a continuous, blindingly bright electrical discharge between them. This was the electric arc, and it released temperatures far hotter than any forge could reach. As TWI’s historical record notes, this demonstration of the arc would eventually become the foundation of an entirely new industry.

Curiously, arc welding didn’t follow immediately. In the early 1800s, batteries were expensive, weak, and impractical for shop work, so the arc stayed a laboratory curiosity. Meanwhile, a different discovery was quietly opening a second door: in 1836, English chemist Edmund Davy (a cousin of Humphry’s) discovered acetylene gas. That finding would, decades later, fuel oxyfuel welding and cutting—a parallel branch of the welding family tree that modern welders still run into, whether they’re studying alternative joining methods like thermite or simply trying to keep the oxy-acetylene history straight from the arc story.

Why the Arc Was the Key, Not Just an Alternative

It’s worth pausing on why the arc mattered so much. Forge welding is indirect—the whole part gets hot, and the smith’s body and judgment are in the loop. The arc is direct and local: energy goes exactly where you point it. That single property unlocked everything that followed: electrodes that could be consumed as filler metal, shielding gases to protect the puddle, and eventually automated processes running on programmable power sources. You can see the modern end of that lineage in today’s shop manuals, from setting up a MIG welder to decoding electrode classifications.

What remained in the 1830s was a practical problem: how do you turn a laboratory spark into a repeatable industrial process? That question set the stage for the 1880s, when a group of European and American inventors—working mostly independently—would finally commercialize the arc and give arc welding its birth year.

1881–1890: The Birth of Arc Welding and the First Patents

Every technology has a moment where a discovery stops being a laboratory curiosity and becomes a practical trade. For arc welding, that decade was the 1880s — and the story begins not in a shipyard or an automotive plant, but in a French battery laboratory.

Auguste de Méritens and the Lead Plates That Started It All (1881)

In 1881, a French physicist named Auguste de Méritens was working at the Cabot Laboratory in Paris, faced with a tedious manufacturing problem: joining lead plates for storage batteries. Traditional joining methods were clumsy for this task. De Méritens discovered that an electric arc could melt and fuse lead cleanly and quickly. It was a modest application by later standards, but it proved the core principle that everything else would be built on — an electric arc produces enough concentrated heat to actually join metal, on demand, with control.

The full history of welding, as TWI documents in its historical overview, credits this work as the seed of arc welding. Crucially, the discovery didn’t stay with de Méritens.

Nikolai Benardos, Stanislaus Olszewski, and Carbon Arc Welding

De Méritens had a student named Nikolai N. Benardos, a Greek-born inventor working in Paris. Benardos took the idea further and developed what became known as carbon arc welding — using a carbon electrode to strike an arc, with the intense heat directed at the workpiece. Along with fellow inventor Stanislaus Olszewski, Benardos secured a British patent in 1885 and a United States patent in 1887.

Those patents matter more than they might seem. The drawings show something recognizable to any modern welder: an early electrode holder, a tool designed to let a human operator hold a consumable rod and manipulate an arc with a steady hand. In other words, Benardos and Olszewski didn’t just patent a physical phenomenon — they designed an interface between a person and the arc. That’s the moment welding became a craft instead of an experiment.

The process they launched was commercialized under the name “Elektrogefest,” and it spread across European industry. Carbon arc welding remained a workhorse for decades, used for everything from shipbuilding to repair work.

Nikolai Slavyanov and C.L. Coffin: The Metal Electrode Era Begins

Benardos’ approach still had a limitation: the carbon arc was harsh and hard to control, and welds were often contaminated. The next leap required melting the electrode itself into the joint.

Two inventors pursued this independently and almost simultaneously:

– In 1888, Russian engineer Nikolai Slavyanov patented a method of arc welding with a metal electrode in Russia, and he’s widely credited with coining the very word “welding” in the Russian engineering vocabulary.
– In 1890, C.L. Coffin of Detroit received the first United States patent for arc welding using a metal electrode — the first documented record of electrode metal being deliberately melted across an arc to fill a joint.

Coffin’s patent is the direct ancestor of every stick weld ever laid. That consumable-electrode principle — burn the rod, deposit the metal, protect the puddle — is exactly what today’s stick welding is built on, and why a beginner struggling with rod angle in 2026 is fighting the same physics Coffin wrestled with in Detroit.

What These Patents Actually Proved

By 1890, the essential building blocks were in place: a controllable arc, a holder to manage it, and a consumable metal electrode that could fill a joint. What was still missing — shielding the weld from the atmosphere, reliable power sources, trained operators, and engineering standards — would take another thirty years of war, shortage, and stubborn invention to solve. But the birth was complete. Arc welding had gone from a French battery experiment to a patented, commercial technology in under a decade.

World War I and the Rise of Shielded Metal Arc Welding (1900–1919)

The first three decades of arc welding were mostly a laboratory story. Inventors could join metal with an arc, but the welds were brittle, inconsistent, and hard to reproduce outside a controlled shop. Between 1900 and 1919, three things happened that turned arc welding from a curiosity into an industry: electrodes got a coating, alternating current made the equipment practical, and a world war forced governments to bet on welding whether they trusted it or not.

Oscar Kjellberg and the Invention of the Coated Electrode

Swedish engineer Oscar Kjellberg is the reason most people today still strike an arc with a consumable stick. Working for the firm Essem, Kjellberg experimented with metal electrodes in the early 1900s and patented a coated, flux-covered metal electrode around 1907, with a follow-up patent in 1914. That coating was the breakthrough. As it burned, it produced gases that shrouded the molten pool and a slag that floated to the surface and protected the cooling bead underneath. The result was a cleaner, tougher, far more repeatable weld.

This is the direct ancestor of manual metal arc welding, the process every shop still calls stick welding, formally shielded metal arc welding or SMAW. The lineage is why electrode classification numbers like E6013 and E7018 still carry flux and arc behavior baked into their design; the E7018 amperage and polarity basics modern welders dial in are descendants of Kjellberg’s coating chemistry, refined over more than a century.

Alternating Current Arrives: C.J. Holslag, 1919

The other early obstacle was equipment. Early arc welders ran on direct current, which meant bulky, expensive motor-generator sets. In 1919, American inventor C.J. Holslag demonstrated practical alternating current arc welding. AC machines were lighter, cheaper, simpler to maintain, and could run off ordinary shop power. Suddenly a small fabrication yard, a shipyard repair berth, or a field crew could afford an arc welder. Historians generally treat Holslag’s AC work as the moment arc welding became accessible equipment rather than specialist machinery, a practicality that shows up decades later in the portable machines hobbyists use today (see whether stick welding is hard for beginners).

World War I: Scarcity as an Innovation Engine

War accelerated everything. Britain entered the conflict with limited domestic fuel and, as the conflict dragged on, faced serious gas shortages that constrained traditional oxyfuel and thermal cutting and joining methods. Electric arc welding did not need acetylene, so it became the primary fabrication method for ordnance: shells, sea mines, and torpedoes were assembled with arc-welded seams at industrial scale. According to TWI’s history of welding, wartime demand pushed arc welding from repair work into primary structural fabrication.

Shipyards were the biggest beneficiary. Welded joints were faster than riveting, used less labor, and produced lighter structures. The HMS Fulagar is cited as an early, perhaps the first, all-welded hull vessel, a floating proof of concept that a ship could be built entirely from welded plate rather than millions of rivets. The Emergency Fleet Corporation, which oversaw American shipbuilding for the war effort, put a committee of engineers to work solving welding’s quality and consistency problems under wartime pressure. As Miller’s welding history timeline puts it, nothing so quickly legitimized a new process as a war that needed it immediately.

1919: The American Welding Society Is Founded

The same urgency produced the profession’s most important institution. In 1919, Professor Comfort Avery Adams of Harvard led 20 members of the Wartime Welding Committee of the Emergency Fleet Corporation in founding the American Welding Society. Their goal was not promotion but standardization: writing specifications, defining test methods, and giving engineers a shared language for what constituted an acceptable weld. The broader history of welding shows how quickly codes followed once welding was being used in ships and structures where failure had consequences.

By the end of 1919, arc welding had a consumable electrode, an affordable AC power source, battlefield-proven credibility, a landmark all-welded ship, and a professional society to govern it. The next problem, the one that had plagued welders since Benardos’s carbon arc, was the air itself.

The 1920s–1930s: Solving the Atmosphere Problem—Gas Shielding and Submerged Arc

By the end of World War I, arc welding worked. Ships were being patched, shells were being welded, and the American Welding Society had just been founded. But every welder who broke open a brittle, porous weld had the same nagging question: why does the metal keep going bad? The answer was invisible and everywhere. It was the air itself.

The Invisible Enemy: Oxygen and Nitrogen in Ordinary Air

Molten steel is hungry. At welding temperatures it will grab oxygen and nitrogen straight out of the atmosphere before it solidifies, and the results are ugly. Oxygen forms brittle oxides that weaken the bead, while nitrogen dissolves into the melt and, on cooling, leaves a porous, spongy weld full of gas pockets. Undercut, porosity, and cracking—defects every modern welder fights with settings and technique, as covered in our guide to welding undercut causes and fixes—had deep roots in this single 1920s realization: the arc needs an atmosphere of its own.

That insight launched one of the most creative decades in welding history, with inventors racing to keep the air away from the puddle by any means necessary.

Hydrogen Atmospheres and Atomic Hydrogen Welding

Some of the earliest serious research came from the gas industry. Irving Langmuir and his colleagues at General Electric experimented with conducting arcs inside hydrogen atmospheres, discovering that a tungsten arc in hydrogen produced far hotter, cleaner welds than one in open air. This line of work produced atomic hydrogen welding in the early 1920s: hydrogen gas was dissociated into atoms by the arc, then recombined on the workpiece, releasing intense heat. For roughly a decade it was the hottest process available, used for welding tungsten and tool steels that refused to behave otherwise. You can read the broader arc of this research in TWI’s history of welding.

Hobart and Devers: The Patents That Pointed the Way Forward

The breakthroughs that shaped modern welding came in 1926, when H.M. Hobart and P.K. Devers filed a remarkable pair of patents. One described shielding the arc with gas; the other demonstrated a concentric nozzle that fed a filler wire through the center of a shielding gas stream. Taken together, they are essentially a sketch of the MIG welding setup welders run today. It would take another two decades of engineering to turn those patents into a practical machine, but the concept—gas shielding plus continuous wire feed—was on paper by 1926.

Automation Arrives: P.O. Nobel and Lincoln Electric

Manual welding remained slow, so the 1920s also brought the first taste of automation. At General Electric, P.O. Nobel developed an automatic welding process around 1920 that fed a bare wire mechanically into the arc under flux-like coverage—a direct ancestor of today’s machine welding. Meanwhile, James Lincoln and his growing company in Cleveland made arc welding practical for the field with portable, rugged machines and improved arc characteristics. Portability mattered more than it sounds: a welder who could carry a machine to a broken part instead of hauling the part to a shop changed what industry thought was possible.

Submerged Arc Welding: Hiding the Arc Under a Blanket of Flux

The decade’s most elegant solution came around 1930–1932, when engineers at National Tube Company developed submerged arc welding (SAW). The concept is beautifully simple: bury the arc under a deep layer of granular flux. The arc never touches open air, spatter is almost eliminated, and the process can run at enormous currents for high deposition rates on long, straight seams. Its first big showcase was infrastructure—massive penstocks for the Tennessee Valley Authority and a water conduit for the Los Angeles water authority, joints measured in feet per minute rather than inches per hour. Pipe work remains SAW’s descendant territory today, and modern crews follow disciplined pipe welding procedures and WPS requirements that trace their logic back to those projects.

A Older Cousin: Thermite Welding

Worth remembering in this era is thermite welding, patented by Hans Goldschmidt in 1893. It uses no arc at all—instead, a chemical reaction between aluminum powder and iron oxide produces molten iron that permanently joins rail sections. It’s still how railroads weld continuous track today, and we explain the chemistry in our guide to railroad thermite welding.

By 1940, the atmosphere problem was solved in principle and in practice. The stage was set for the wartime pressure cooker that would produce TIG, MIG, and the modern welding era almost overnight.

World War II, Heliarc, and the Explosion of Modern Arc Processes (1940–1959)

By the late 1930s, arc welding had proven itself on bridges, boilers, and ship hulls. But nobody could weld thin magnesium aircraft skin without warping it, and reliable aluminum welding was still a laboratory curiosity. Then a war arrived with an unforgiving deadline. Between 1940 and 1959, wartime urgency compressed what might have been fifty years of gradual progress into a single explosive decade, producing four processes that still dominate the trade today: GTAW, GMAW, FCAW, and electroslag welding.

Russell Meredith, Magnesium, and the Birth of Heliarc (1941)

The problem the U.S. Navy could not ignore was metallurgy. Aircraft builders were moving to magnesium and aluminum alloys to save weight, but those metals oxidize almost instantly once molten, and the intense heat of a carbon or metal arc burned straight through sheets measured in fractions of an inch.

Russell Meredith, a welding engineer at the Naval Aircraft Factory in Philadelphia, attacked it from an unusual direction. Instead of fixing the electrode, he removed it from the equation. He struck the arc with a non-consumable tungsten electrode, then flooded the weld zone with helium, an inert gas that refuses to react with hot metal. The result, perfected in 1941, was gas tungsten arc welding. Navy shop slang called it “Heliarc,” and the Navy licensed the process to Linde Air Products, a division of Union Carbide, which spent the war building the torches, power supplies, and training programs that turned a one-shop fix into an industry standard according to Miller Welds’ historical record.

Helium was not an arbitrary choice. It was cheap, available, and easier to store than the argon that later became common, which is one reason the Heliarc name outlived its own accuracy. Today the process is GTAW, or TIG welding, and the same physics Meredith worked out in Philadelphia still runs every precision weld on thin stainless, titanium, and aluminum. If you want to see how far that lineage has come, our complete guide to TIG welding sheet metal covers the modern settings and the mistakes that still burn through panels eighty years later.

From Tungsten to Fed Wire: GMAW Arrives (1948)

Heliarc was a marvel, but it was slow, and shipyards and tank plants needed metal deposited faster than any skilled TIG hand could manage. In 1948, the Battelle Memorial Institute, sponsored by the Air Reduction Company, solved the bottleneck with an elegant swap: keep the gas shield, but replace the tungsten with a continuously fed consumable wire. The wire became the electrode, melted into the joint, and served as filler metal all at once.

Two pieces of hardware made it workable. The constant-voltage power source self-regulated arc length as the operator moved the gun, and smaller, more consistent filler wire fed smoothly through a lightweight gun liner. Together they made gas metal arc welding learnable by anyone who could hold a torch steady, not only by metallurgists with unusually patient hands as TWI’s welding history records.

Cheap Gas and Short Circuit: MIG Goes Mainstream (1953–1959)

Helium and argon stayed expensive into the 1950s, which kept early GMAW equipment locked in heavy industry. That changed in 1953, when welders proved that carbon dioxide, a cheap byproduct of combustion, could shield mild steel welds effectively. CO2-shielded GMAW spattered badly and demanded harder wire and higher voltages, but it was inexpensive, and in production work inexpensive wins. MIG spread rapidly into fabrication shops, car plants, and farm equipment repair.

Short-circuiting transfer, commercialized between 1958 and 1959, widened the range again by letting the wire short into the puddle hundreds of times per second, taming heat input enough to weld thin sheet without blowing through. Everything from ductwork to car bodies came within reach. When you set wire speed and voltage on a modern machine, you are adjusting the direct descendants of those postwar breakthroughs, and our MIG setup walkthrough shows exactly how those two dials interact.

Flux Core, Electroslag, and the Rest of the Decade

Two more processes rounded out the era. Flux-cored arc welding emerged between 1957 and 1959, taking the MIG gun and stuffing the wire with flux. The result deposited metal faster than solid wire, worked outdoors without a shielding gas cylinder, and laid the groundwork for the self-shielded wire that structural and pipeline crews still lean on in wind and out-of-position work, which is why our flux core wire technique guide reads like it could have been written for a 1959 fab shop. Electroslag welding arrived in the mid-1950s, using a conductive molten slag to melt thick sections in a single pass, making it possible to weld plates measured in inches rather than gauges for heavy machinery and pressure vessels per the standard process overviews.

Zoom out and the pattern is unmistakable. TIG in 1941, MIG in 1948, CO2 shielding in 1953, electroslag in the mid-1950s, and flux core by 1959, all arriving in under twenty years after decades of stall. Wartime procurement money, factory floor deadlines, and a shortage of skilled hands did what peacetime research budgets could not. Nearly every process a modern welder picks up traces back to that compressed window.

The Late 20th Century: Plasma, Laser, Electron Beam, and Friction Stir Welding

The urgency that drove wartime arc welding didn’t disappear once the conflicts ended. With industries expanding into aerospace, nuclear energy, and high-speed manufacturing, engineers needed welds that were cleaner, deeper, and able to join materials that traditional arc processes simply couldn’t handle. This push led to a wave of precision-driven innovations that still shape fabrication today.

Electron-Beam Welding: Joining in a Vacuum

One of the first breakthroughs of this era came from German physicist Dr. Karl-Heinz Steigerwald, who developed electron-beam welding in 1949. By firing a focused beam of electrons in a vacuum, this process could melt and join metal without the use of filler material. The vacuum shielded the weld pool from atmospheric contamination, allowing for extremely narrow, deep, and pure welds.

These qualities made electron-beam welding a natural fit for industries where precision was non-negotiable, such as aerospace, medical devices, and nuclear components. While the requirement for a vacuum chamber limited its portability, it set the standard for high-precision, low-distortion joining that later processes would strive to replicate.

Plasma Arc Welding: A Sharper Arc

Building off of gas tungsten arc technology, plasma arc welding took the principle of a constricted arc and pushed it further. By forcing the arc through a small nozzle, it created a column of plasma that reached far higher temperatures than a conventional GTAW arc. This allowed for deeper penetration, faster travel speeds, and tighter control over the weld pool.

For fabricators working on thin materials or automated setups, plasma proved incredibly useful. Much like the precision covered in guides such as The Complete Guide to TIG Welding Sheet Metal, plasma offered a level of control, but with even greater density of energy for specialized jobs.

Laser Beam Welding: Speed Meets Accuracy

As laser beam welding matured in the latter half of the century, it became one of the most versatile precision processes available. Using a highly focused beam of coherent light, lasers could deliver pinpoint heat with minimal distortion to the surrounding metal. This made them ideal for high-speed, automated production lines, from automotive bodywork to microelectronics.

The ability to weld without direct contact also opened doors for hard-to-reach joints. Paired with modern automation and the type of reliable welding connectors used in industrial rigs, laser systems could be integrated with incredible repeatability.

Flux-Cored and Inverter Power Sources: Power for the Masses

While the above processes pushed the boundaries of precision, another shift was happening on the shop floor: portability and efficiency. The wider adoption of flux-cored arc welding gave operators a way to achieve high deposition rates with less sensitivity to wind, making it a staple for structural work. For those looking to refine their technique, resources like Flux Core Wire Welding Tips can be a great starting point.

At the same time, inverter-based power sources began replacing bulky transformer machines. Inverters drastically cut weight, improved arc stability, and allowed for more precise amperage control. These gains helped bring advanced processes to smaller shops, and even paved the way for compact MIG TIG combo welders for multi-process work.

Friction Stir Welding: Joining the ‘Unweldable’

The most game-changing solid-state development came from TWI (The Welding Institute). In 1991, W.M. Thomas and colleagues invented friction stir welding, patented under GB patent application 9125978. This non-fusion process uses a rotating, hardened tool to generate frictional heat and mechanically stir the material together, allowing for the joining of high-strength 2xxx and 7xxx aerospace aluminum alloys that had long been considered unweldable.

According to recent market analysis, the global friction stir welding market was valued at roughly $278 million in 2025 and is projected to approach $461 million by 2034, growing at a CAGR near 5.8%. This steady growth shows that these once-niche, ‘new’ processes are still scaling to meet the demands of modern fabrication.

From vacuum-sealed electron beams to the friction of a spinning tool, the late 20th century proved that the arc wasn’t the only way forward. Yet, all of these innovations shared the same goal as their predecessors: to join metal faster, safer, and stronger than ever before.

How Arc Welding Processes Evolved: A Comparison of SMAW, GMAW, GTAW, FCAW, and SAW

Ask ten welders which process is “best” and you’ll get ten different answers, because each major arc process solved a specific problem its predecessor couldn’t. Stick welding won portability. MIG won speed. TIG won precision. Submerged arc won raw deposition. Understanding that lineage is what turns a list of acronyms into a decision you can actually make on Monday morning.

The Big Five at a Glance

SMAW: The Portable Original

Shielded metal arc welding descends directly from Kjellberg’s coated electrode idea: a consumable rod with a flux skin that melts into a protective slag and gas envelope around the puddle. That simple trick solved the atmosphere problem described in the 1920s section and gave welders something radical — a complete welding plant that fits in a bucket. No gas cylinder, no wire spool, no wind to fight.

That’s why stick is still the field standard on construction sites, bridges, and remote repairs. If you’re starting out, our honest beginner’s take on whether stick welding is hard is a good reality check, and the rod-choice guides for 3/32 E7018 and 5/32 E7018 amperage settings get you running quickly. The trade-off is deposition speed and cleanup: every inch is hand-laid, and the slag must be chipped away.

GMAW: The Production Workhorse

Since Battelle’s 1948 breakthrough, gas metal arc welding has pushed a continuously fed wire electrode through a shielding gas curtain, and that one design choice delivers the highest deposition rate of any hand-fed process. Modern MIG is fast, relatively forgiving, and nearly spatter-free with the right settings, which is why it dominates automotive assembly and production fabrication shops. The caveats are wind sensitivity (gas gets blown away outdoors) and more consumables to manage. Before you strike an arc, run through how to set up a MIG welder, and respect the process-specific hazards covered in our MIG welding safety precautions guide.

GTAW: Precision at a Price

Meredith’s Heliarc process trades speed for control. A non-consumable tungsten electrode creates the arc while a separate filler rod is dabbed in by hand, all under inert gas. Nothing about it is fast, but nothing else matches it on thin stainless, aluminum, or anything where the weld must be as strong and clean as the base metal. Our TIG sheet metal guide walks through settings and the mistakes that ruin thin work.

FCAW and SAW: Volume and Depth

Flux-cored arc welding put Kjellberg’s flux inside a tubular wire, giving stick-level penetration with MIG-style feeding — a natural fit for structural steel and outdoor jobs where gas shielding fails. Our flux-core wire welding tips cover the technique quirks. Submerged arc welding, developed in the early 1930s, buries the arc under granular flux so no visible arc or spatter escapes; it remains popular for pipe and heavy-plate work requiring high deposition rates, and it’s a staple of pipe welding procedures and pressure-vessel fabrication. For the thickest joints, electroslag and thermite processes take over — see how railroad thermite welding joins rail without any arc at all.

Every one of these processes assumes you’re properly protected first, so review the current standards in welding PPE: the complete guide to protective gear before learning any of them. And if one machine sounds better than choosing, a MIG/TIG combo welder is how many hobbyists get two processes without two budgets.

Common Myths, Mistakes, and Misconceptions About Welding History

When you hear someone say a single genius “invented welding,” or that TIG should still be called “Heliarc,” chances are you’ve stumbled onto a piece of welding folklore. These stories get passed down so often that they begin to sound like fact. The reality is far less tidy, but far more useful for anyone looking to understand the trade. Let’s clear the slag off of the most common myths while also covering a few research mistakes to avoid.

Myth 1: One Person “Invented Welding”

The idea of a lone inventor rarely holds up in the history of arc welding. Instead of a single “eureka” moment, the technology was built by multiple people working towards similar goals around the same time. This collaborative nature is well documented in TWI’s welding history records, which showcase how progress was a relay rather than a solo sprint.

One of the best examples of this is the Slavyanov and Coffin comparison. Around 1888, Russian metallurgist Nikolai Slavyanov demonstrated transferring metal across an electric arc. However, his goal was to cast metal into a mold, not to join two pieces together. Two years later, in 1890, Detroit’s C.L. Coffin received the first U.S. patent for metal-electrode arc welding, with the specific intent of filling a welded joint between pieces of base metal. Since his work directly aligned with what we define as welding today, Coffin often gets the modern credit, even if Slavyanov’s demonstration came first.

Myth 2: “Heliarc” Is Still the Correct Name for GTAW

Many veteran welders still refer to TIG as “Heliarc,” and for good reason. Russell Meredith’s wartime process truly was called Heliarc, a name that stuck around for decades in shop slang. The issue lies with the shielding gas. At the time, helium was used, but it was hard to get and expensive after the war. Before long, argon became the standard for the process. Since the name specifically referenced helium, the American Welding Society moved to the more accurate term, GTAW (Gas Tungsten Arc Welding).

This isn’t just a matter of semantics, either. The gas you choose can drastically change your results, a concept that is still crucial for modern TIG welding settings and techniques. Calling everything “Heliarc” can easily mask those key differences.

Myth 3: Arc Welding Instantly Killed Forge Welding

Despite the excitement surrounding new electric processes, forge welding did not disappear overnight. For decades, blacksmiths, rail crews, and farm shops continued to use hammer-and-fire welding, often right alongside their new arc equipment. Some joining methods were even so well suited to their niche that they never left. A prime example is railroad thermite welding, a process that stems from Hans Goldschmidt’s work in 1893. Technology rarely replaces everything at once, and these transitions tend to be slow, regional, and based on practicality.

Myth 4: Welding Codes Existed From the Beginning

Early bare-wire electrodes, mostly of Swedish and Norwegian origin, produced weld metal that was weak and brittle. For a time, there were very few rules forcing anyone to do better. It wasn’t until welding codes were introduced that measurable standards for ductility, toughness, and tensile strength began to take hold. These specifications played a huge role in accelerating the adoption of coated electrodes, as the flux helped produce far sounder deposits. Today, those classifications are still with us, and you can see exactly how they work in our guide on what electrodes are in welding.

Common Research Mistakes to Avoid

• Mixing oxyfuel and arc timelines. Oxygen and acetylene cutting and welding developed in parallel with arc processes in the early 1900s, but they are entirely different technologies.
• Dating MIG to the wrong decade. GMAW (MIG) arrived in 1948, not the 1950s. The CO₂-shielded variant came in 1953, and flux-cored wire followed between 1957 and 1959. These were improvements, not the invention. If you’re learning the ropes, our modern MIG machine setup guide is a great place to start.
• Attributing spot welding to arc welding. Resistance spot welding is a different physical process entirely. To understand its mechanics, check out how spot welders actually work.
• Assuming names translate cleanly. Terms like German Widerstandsschweißen, Russian terminology, and American names can overlap, but they rarely mean the exact same thing. This is a frequent source of duplicated “inventor” claims.

At the end of the day, welding history is messier and more collaborative than the legend. Understanding that mess isn’t just trivia. It teaches you why each process exists, a skill that goes a long way when weighing your options between stick and other processes or troubleshooting a real-world weld.

The Human Side: Welders, Safety, and the Trade That Builds the World

Every date, patent, and process in this timeline ultimately belongs to people. Arc welding was not shaped by machines alone; it was shaped by welders who stared into bare arcs without any eye protection, by shop foremen who watched coatings crack and porosity spread, and by generations of apprentices who learned the trade the hard way. Understanding how the craft, the training, and the safety culture evolved tells us as much about the history of arc welding as any patent number.

From Bare Eyes to Full PPE: How Protection Caught Up

The earliest carbon-arc welders of the 1880s worked with essentially nothing. There were no helmets, no shaded lenses, no gloves worth the name. Operators judged temperature by the color of the puddle and protected their eyes by simply looking away or, in some shops, holding up a piece of smoked glass. The result was a familiar injury we still name today: photokeratitis, or “arc eye,” a painful sunburn of the cornea caused by ultraviolet radiation. Skin burns were just as common, which is why thick leather eventually became the default uniform of the trade.

Protection improved in step with the processes themselves. The arrival of shielded metal arc welding in the late 1900s and 1910s brought flux coatings, spatter, and fumes that demanded more than an apron. Auto-darkening helmets, flame-resistant clothing, respirators, and local exhaust ventilation are now standard expectations rather than luxuries. If you are building out your own kit, our welding PPE guide walks through the gear that actually matters, and what a welder wears explains how those layers work together on a real job site.

Safety education became process-specific too. Modern guides such as MIG welding safety precautions exist precisely because gas-shielded wires introduced new hazards around compressed cylinders, wire feed, and shorter, more intense arcs.

The Trade by the Numbers Today

The welding workforce is large, steady, and concentrated. According to the U.S. Bureau of Labor Statistics, the country had roughly 437,700 jobs for welders, cutters, solderers, and brazers in 2025, with a median annual wage of $53,750. Employment is projected to grow about 2% through 2035, which sounds modest until you look at how that growth is distributed.

About 61% of welders work in manufacturing, with meaningful additional demand coming from specialty trade contractors, structural steel crews, shipbuilding, energy, and pipeline work. Those openings are not primarily new positions. Earlier BLS outlooks projected roughly 45,600 average annual openings through 2034, driven largely by retirements and workers leaving the trade for other occupations.

An Aging Workforce and What History Says About Adaptability

That churn matters because the trade is getting older. The American Welding Society has cited a figure of roughly 21% of welders over age 55. When a fifth of the workforce is within a decade of retiring, institutional knowledge walks out the door with it. The good news is that this is not new. Welding has reinvented itself repeatedly: forge welders became arc welders, stick shops added MIG, and pipeline crews now run automated hot-wire processes. The welders who thrived were the ones willing to learn a new process rather than defend an old one.

Practical, process-specific knowledge has never been easier to pick up. A beginner might start with whether stick welding is hard, then move into electrode selection with what electrodes in welding actually are, and eventually work toward code-driven fields like pipe welding procedures, where certification, WPS documents, and inspection define the job.

The Lesson That Carries Forward

The history of arc welding shows a simple pattern: a technical leap happens, the work gets safer and faster, and the people who adapt keep building. From Benardos’ carbon arc to friction stir welding, the constant was never the equipment. It was the welder at the end of the cable, learning one more thing.

Frequently Asked Questions

Who invented arc welding?

Arc welding has no single inventor. Auguste de Méritens first used arc heat to join lead plates in 1881, and his student Nikolai Benardos patented carbon arc welding shortly after. C.L. Coffin of Detroit received the first U.S. patent for metal-electrode arc welding in 1890, while Russian inventor Nikolai Slavyanov demonstrated a similar idea independently around 1888.

What was the first arc welding process?

Carbon arc welding, developed by Nikolai Benardos in the 1880s, was the first practical arc welding process. It used an arc struck between a carbon electrode and the workpiece to produce heat, with filler metal added separately.

Why did early arc welds fail so often?

Early welds used bare electrodes with no protection from the surrounding air. Oxygen and nitrogen reacted with molten metal, producing brittle, porous, and inconsistent welds. Flux coatings, introduced by inventors like Oscar Kjellberg around 1907, and later shielding gases solved this atmosphere problem.

How did wars accelerate arc welding development?

World War I created a British gas shortage that made electric arc welding the primary way to build shells, mines, and torpedoes. World War II demanded fast, reliable welding of aircraft magnesium and ship steel, directly driving the perfection of Heliarc (GTAW) in 1941 and the development of MIG welding in 1948.

What is the difference between TIG, MIG, and stick welding historically?

Stick welding (SMAW) grew from Kjellberg’s flux-coated electrodes in the early 1900s. TIG (GTAW) was perfected by Russell Meredith in 1941 using a tungsten electrode and helium shielding. MIG (GMAW) came later, developed at Battelle Memorial Institute in 1948 using continuously fed wire.

When was submerged arc welding invented?

Submerged arc welding was developed around 1930–1932, with National Tube Company credited for the process. A heavy granular flux covered the arc, shielding the molten weld; it was used on major projects like TVA penstocks and the Los Angeles water conduit.

What is the newest major welding process?

Friction stir welding, invented at The Welding Institute (TWI) in 1991, is one of the most significant modern joining innovations. It is a solid-state process that never melts the metal, allowing previously unweldable aerospace aluminum alloys to be joined with strong, low-distortion joints.

Why is TIG welding sometimes still called Heliarc welding?

Russell Meredith’s 1941 process originally used helium as its shielding gas, and Linde Air Products marketed it as ‘Heliarc.’ Once argon became a common alternative shielding gas, the American Welding Society noted the name was no longer technically accurate, though the term persists in workshop slang.

How big is the welding industry today?

The U.S. Bureau of Labor Statistics counted about 437,700 welder, cutter, solderer and brazer jobs in 2025, with a median annual wage of $53,750. Demand stays steady because annual openings are driven heavily by retirements and workers leaving the trade, not just new growth.

What lessons does welding history give new welders?

Every major advance solved a specific problem—heat control, atmospheric contamination, deposition speed, or consistency. Understanding that ‘why’ behind processes helps modern welders troubleshoot defects, choose the right process for a job, and adapt as new techniques emerge.