SMAW Can Be Performed in Which Positions? The Complete Stick Welding Position Guide

A fab shop owner once told me he almost lost a bridge retrofit bid because a welder answered “flat and horizontal” when the inspector asked which positions he could run stick in. The drawing had a vertical-up groove splice and an overhead fillet under a deck — and one honest sentence about SMAW’s four plate positions would have saved that crew a week of re-testing and reshuffling.

Why the Question \”Which Positions Can SMAW Run?\” Actually Matters

A fab shop owner in Ohio once told me he nearly lost a bridge retrofit bid over a single sentence. His crew was being pre-qualified, and when the inspector asked the incoming welder which positions he could run stick in, the kid answered, \”Flat and horizontal.\” The drawing had a vertical-up groove splice on the main girder and an overhead fillet under the deck. One honest sentence — I can run stick in flat, horizontal, vertical and overhead — would have kept the crew intact. Instead, the shop spent a week reshuffling people and re-testing welders to get back where it started.

That story is why this guide exists. The question \”SMAW can be performed in which positions?\” looks like flashcard trivia from welding school. In the real world it’s a gatekeeper. Whether you’ve never struck an arc, you’re a student trying to understand what your certification test will actually qualify you to do, or you’re a foreman scoping a job and deciding which names belong on the crew list, you need the straight answer first, then the nuance.

The Straight Answer, Right Up Front

SMAW — Shielded Metal Arc Welding, which almost everyone in the trade just calls stick welding — can be performed in all four plate positions: flat, horizontal, vertical and overhead. Not \”most of them,\” and not \”most of them with the right rod.\” All four, on plate and on pipe. Under the AWS position designation system those are numbered 1 through 4, with an F for fillet welds and a G for groove welds, giving you 1F, 2F, 3F, 4F, 1G, 2G, 3G and 4G. On pipe you’ll also hear 1G, 2G, 5G and 6G, which follow their own separate logic we’ll cover later.

This all-position capability is what makes stick welding genuinely special among welding processes. Miller Electric’s overview of the four basic welding positions lays it out clearly: the four positions exist because gravity changes everything about how a molten puddle behaves, and a process’s position range tells you exactly where it can fight gravity and win. Stick wins everywhere.

Where SMAW Actually Gets Used

That capability translates straight into where stick shows up in the field: structural steel in high-rise construction, bridge retrofits and field splices, cross-country and gathering-line pipelines, shipyards, power-plant maintenance shutdowns, and the one-off repair work where a machine gets dragged onto a muddy job site and has to weld whatever’s in front of it.

The reason it dominates those environments isn’t sentiment or tradition. It’s physics and logistics. Stick equipment is portable — a power source, a stinger, a box of rods. There are no gas cylinders to secure and haul, which matters enormously on a lift or a scaffold. The flux coating gives the arc a natural wind tolerance that gas-shielded processes like MIG and TIG simply can’t match in open air. And stick will burn on dirty, rusty, mill-scaled plate in a way that would leave a MIG welder chasing porosity all afternoon. If you’re curious how gas-shielded processes handle those same challenges differently, our guide on MIG welding safety and setup practices walks through the trade-offs.

SMAW is also still the only truly practical process for open-root pipe welding in the field. A root pass with a stick rod on a fixed 6G joint is a skill that has never been fully replaced, which is a big part of why pipeline welders who can do it command premium pay.

Why Position Range Drives Your Paycheck

Here’s where the technical answer meets your career. On welder job applications, position qualification is the single most common gate. Walk into a structural fabrication shop or a union local, and the first conversation is rarely about which machine you can run. It’s about which positions you’re qualified in, on which materials, in which processes. A welder qualified on 3G and 4G groove tests with SMAW is worth considerably more to an employer than one qualified only in flat and horizontal, because the harder positions are exactly the ones shops struggle to staff and job sites actually require.

The progression is predictable and worth understanding early. Flat work is easiest to learn and most common in production shops, so flat-only welders are plentiful and wages reflect it. Add horizontal and vertical-up and you move into structural work. Add overhead and pipe positions like 5G and 6G and you’re in the tier called for shutdowns, pipeline spreads, and out-of-position repair work, where hourly rates climb steeply.

Before we dig into the individual positions, it helps to know where stick welding fits if you’re just starting and feeling overwhelmed. If you’ve been wondering whether this process is realistic for a beginner, our honest breakdown of whether stick welding is hard to learn will give you a grounded answer. And if you’d like to understand the electrode classification numbers that appear throughout the rest of this guide, our guide on what electrodes are and how to read their numbering covers the AWS system in full.

The rest of this article takes that straight answer apart position by position — what your body, your electrode angle, and your travel speed are actually doing in each one, which rods belong where, and what a certification test in each position really proves.

What a Welding Position Actually Means: The Number-and-Letter Code

Before you can answer “which positions can SMAW run,” you have to be able to read the answer. Welding positions are written as a number followed by a letter, like 3G or 2F, and that little code tells you two separate things at once: how the workpiece is oriented relative to gravity, and what kind of joint you are welding. Once you can decode it, you can read a job posting, a WPS, a certification stamp, or an inspector’s question in about two seconds.

The Number Tells You Where Gravity Points

The number is always first, and it refers to the orientation of the work being welded:

• 1 = Flat. You are welding down into the joint from above. The workpiece sits on a bench or trestle, roughly horizontal, and gravity pulls the puddle into the joint instead of fighting you.
• 2 = Horizontal. The workpiece is still roughly vertical or upright, but the weld axis runs horizontally. Think of a fillet weld on the inside corner of a column and beam.
• 3 = Vertical. The weld axis runs straight up or straight down. You are welding along a vertical seam, and the puddle wants to drip.
• 4 = Overhead. The weld is above your head and the puddle hangs overhead, held up by surface tension and fast-freezing technique. This is the position that separates hobbyists from structural welders.

That 1-through-4 scale is the same one described by Miller Welds’ guide to the four basic welding positions, and it applies to every arc process, not just stick.

The Letter Tells You the Joint Type

The letter is the joint, and there are only two that matter for plate:

• F = Fillet weld. Two pieces meeting at roughly a right angle, welded in the corner. A lap joint and a tee joint both take fillets. You are welding into a V-shaped corner with no bevel required.
• G = Groove weld. Two edges butted together with a bevel, V, U, or J preparation, and the weld fills that prepared gap. Groove welds go all the way through the plate thickness, which is why they are the ones that get bend-tested.

If you want a deeper refresher on how those joints are prepared and spaced, our welding positions and joint types breakdown covers joint geometry and fit-up in detail.

Combining the two gives you the eight basic plate designations:

The ISO 6947 Equivalent, for International Work

Outside the United States, and on many international project specs, you will see letters instead of numbers. ISO 6947 describes the same physical positions with its own alphabet, and API and ASME documents reference it. Here is the mapping so you are not left guessing on a foreign drawing package:

Notice that ISO splits vertical into an up variant (PF) and a down variant (PG). That distinction matters more than it looks, because on structural groove welds the two are not interchangeable. The Lincoln Tech position guide walks through the same split with diagrams if you are a visual learner.

One last thing beginners often miss: these designations are qualification language, not just technique labels. A stamp reading 3G/4G means something specific to an inspector, and the next sections on technique, electrodes and certification all build on this vocabulary.

The Four SMAW Plate Positions in Detail: Technique, Angles and Travel

Knowing the four names is one thing; running them without ruining a plate is another. This is the practical part: for each position, what your hands actually do, where the electrode points, and where it all goes wrong.

One rule applies across all four: your travel angle controls penetration, your work angle controls bead shape, and your arc length controls everything else. Once those three click in flat, the other positions are mostly a matter of resisting gravity in different directions.

Flat Position (1F and 1G): Where Everyone Starts

The workpiece sits horizontal and metal is deposited from above, so gravity works for you. For a fillet weld (1F), the electrode sits at roughly 45 degrees into the joint, splitting the two plates evenly. For a groove weld (1G), it points about 10 to 15 degrees back from vertical in a drag (pull) travel angle, letting arc force dig into the root rather than sit on top of it.

Because gravity helps the puddle wet out, flat is the most forgiving position and the best place to build bead-stacking skills. The classic mistake is the opposite of what you’ll fight later: too much heat and too slow a travel speed, which on thin material gives burn-through and an over-wide, lumpy bead. If you’re welding sheet, dial the machine down; our guide on stick welding thin metal covers the settings and fixes. Hold arc length about equal to the core wire diameter, watch puddle width instead of the arc, and let the previous bead’s edge guide the next pass.

Horizontal Position (2F and 2G): Fighting the Sag

Rotate the joint so the weld line runs horizontally along a vertical surface and flat gets a bias correction. The electrode still works at about 45 degrees for a fillet, but you point it slightly upward, typically 5 to 15 degrees of uphill travel angle. That tilt does real work: arc force pushes molten metal up and into the joint, holding the puddle against gravity until it freezes. Point it level or down and the metal drools onto the lower plate.

Keep the arc concentrated on the upper edge of the groove or the top leg of the fillet, because heat follows the arc and the upper plate is where you need fusion; the lower plate fills in behind. Your two enemies are undercut on the top edge and overlap or “rope-on” on the bottom plate, where sagging puddle freezes over unmelted metal. Travel speed fixes both: too slow sags, too fast undercuts. If undercut shows up anyway, our undercut causes and fixes guide covers acceptance limits and correction technique.

Vertical Position (3F and 3G): Up or Down?

Vertical is where welders separate themselves, and it is really two techniques wearing the same name.

• Vertical-up starts at the bottom and climbs. Slow down, use a modest side-to-side weave or tight stringers, and pause briefly at each toe so the puddle ties into both sides. It gives deeper penetration and much greater confidence of complete root fusion, which is why structural groove tests under AWS D1.1 effectively default to it on heavy plate.
• Vertical-down runs top to bottom, faster and with a pointed arc. It’s thinner and cleaner, common in pipe roots and light fabrication with fast-freeze rods like E6010, but generally not accepted for structural groove qualification on thicker material because reduced heat input risks lack of fusion.

The critical adjustment: drop amperage roughly 10 to 15 percent versus flat with the same rod. Heat rises, literally and figuratively — the metal above your puddle is already hot, so the setting that felt comfortable flat will make the vertical puddle run away. Keep any weave to about 2 to 2.5 times the electrode diameter; wider and the center overheats while the toes stay cold.

Overhead Position (4F and 4G): Gravity Is the Enemy

Overhead makes beginners nervous, and the nerves are the real hazard: a tense arm shakes, arc length wanders, and the puddle collapses onto your hood. The technique is a checklist — shortest arc you can hold, smallest rod that will still run the joint, reduced amperage, and a tight, fast-freezing puddle. Most welders run 1/8 in or 3/32 in electrodes overhead because a smaller puddle sets before it can sag.

Work angle stays near 45 degrees into the fillet or centered in the groove, with a slight 5 to 15 degree drag. Move decisively: an overhead puddle that hesitates grows, and a growing puddle falls. Brace both forearms against something solid, avoid looking straight up into the arc path, and get comfortable before you strike; for setup and rod choice see our dedicated overhead stick welding guide. All-position low-hydrogen rods like E7018 run well here, and fast-freeze rods are more forgiving still.

Putting It Together: A Day on the Beam

Consider a typical ironworker’s afternoon: a 2F fillet connecting a clip to a column flange, then a 4F overhead stitch under the deck, then a splice calling for a 3G vertical-up groove. Same machine, same 1/8 in E7018, three different amperage settings, three body positions. That’s the employability argument — a crew that can only run flat is a shop crew, while one that can run all four goes where the work is. As Miller’s welding basics reference puts it, position capability is what makes a welder flexible across joint types and job sites, and it’s worth protecting yourself with proper gear while you practice, from flame-resistant clothing to the checklist in our welding PPE guide.

Learn these four in order, and pipe positions in the next section become a natural extension instead of a wall.

Pipe Positions: 1G, 2G, 5G, 6G and 6GR Explained

Plate positions are only half the story. Step onto a pipeline right-of-way, into a power-plant turnaround, or under a refinery riser and the numbering starts over and gains new members: 5G and 6G, designations that exist because pipe refuses to behave like a flat plate. Assume 6G is just “a harder 2G” and you will burn a week on a coupon you were not ready for. Knowing what each code actually asks of your body and your rod is the difference between a pass and an expensive repeat.

Why Pipe Gets Its Own Numbering System

On plate the joint sits still and you decide where to stand. On pipe, the workpiece orientation itself is part of the test. A pipe can be rolled while you weld, fixed in place while you circle it, or inclined so that you fight gravity in two directions at once. AWS and ASME therefore wrote pipe positions that describe the pipe’s relationship to the horizon, not yours. Several of them do not map onto the plate ladder at all.

1G: The Rolling Test (Easiest)

In 1G the pipe lies horizontally on turning rolls and is rotated continuously while the welder holds the electrode in roughly one spot. Because the joint moves under a stationary arc, the puddle behaves like a flat weld the whole way around. That makes 1G the fastest, cheapest pipe coupon to run — and the least respected in the field. Nobody hires you to roll pipe on a jobsite; pipes there are already welded to something.

2G: Vertical Pipe, Horizontal Weld

Stand the pipe on end. The groove then runs horizontally around it and the welder works side to side around the circumference, the pipe-world cousin of 2G on plate. Unlike 1G, the pipe stays fixed, so the challenge shifts from puddle control to body mechanics. You are walking a circle, feeding rod into a joint that reads flat-ish in one place and overhead-ish in another, while the bead itself stays horizontal to the joint. It is an awkward test, and a prerequisite for a great deal of structural and pressure-piping qualification.

5G: Fixed Pipe, All Gravity, One Coupon

Now lay the pipe horizontally and fix it in place. No rolling. The welder starts at 6 o’clock welding overhead, climbs the side through vertical, crests the top in flat, and mirrors back down the other side to overhead again. In one continuous, position-changing weld, the 5G candidate has demonstrated flat, vertical and overhead skill on pipe.

The fact that trips most candidates: a 5G test qualifies 1G, 3G and 4G — flat, vertical and overhead — but it does not cover horizontal 2G. Horizontal on pipe requires its own demonstration. That is a lot of value from one coupon, which is why 5G is one of the most commonly requested tests in pipeline and structural-steel work.

6G: The 45-Degree Compound Test

Clamp the pipe fixed at a 45-degree incline and you have 6G. The weld axis is neither horizontal nor vertical; the joint runs through a continuously shifting compound angle, and the puddle must be controlled through flat, vertical, overhead and everything between, all on a single fixed coupon. The root is typically open-root and gap-controlled, often run downhill on E6010, then filled and capped uphill on E7018. For the wider context on how these setups feed into WPS development and inspection, our pipe welding procedures guide covers the full picture.

Because 6G covers every pipe welding position on one coupon, AWS D1.1 accepts a 6G test in lieu of 5G — never the reverse. Passing 5G does not get you 6G. Memorize that one-way street before you decide which test to pay for.

6GR: The Restricted-Access Variant

6GR adds a restriction — usually a tee or lug welded near the joint — that limits torch and electrode access, simulating a branch connection or offset. The “R” stands for restricted. Passing 6GR generally qualifies you for 6G work as well, making it the most complete stick pipe qualification you can hold.

Uphill vs Downhill Progression

Pipe positions also carry a progression designation under ISO 6947: PH for uphill and PJ (sometimes PG in older references) for downhill. The distinction is a code requirement, not cosmetics. API 1104 permits downhill welding for suitable wall thicknesses and electrodes on cross-country pipeline, and E6010 root passes are routinely run downhill. ASME Section IX pressure piping, by contrast, generally requires uphill progression for most groove welds, and a downhill qualification does not cover uphill unless specifically tested. Check your WPS before assuming a downhill coupon buys uphill work.

What Each Test Actually Qualifies

Three codes govern this space: AWS D1.1 for structural steel, ASME Section IX for pressure piping and boilers, and API 1104 for pipeline systems. They are not interchangeable — a coupon accepted under one may be rejected under another. Confirm which code the employer’s inspector will work to before you test.

The takeaway: a 6G test is the highest-leverage coupon in welding, covering every position on one pipe with weight a 5G alone never carries. And whatever coupon you hold, remember that a qualification card is only as current as your continuity — more on that in the certification section ahead.

Electrode Selection by Position: E6010, E6011, E6013, E7018 and Beyond

Once you can strike and hold an arc, your next problem is picking the right rod for the position you are standing in. An electrode that runs like a dream in flat can drip and spatter overhead, and position decides which consumable is legal and which will pass inspection.

How to Read an AWS A5.1 Classification, Digit by Digit

Every stick electrode sold in the United States carries an AWS (American Welding Society) classification stamped on the flux, and each character means something. Take E7018, the most widely used structural rod:

The digit that matters most here is the second-from-last digit, the position digit. A 1 means all positions: flat, horizontal, vertical, overhead. A 2 means flat and horizontal only. That single number is why an E7024 runs a beautiful horizontal fillet but is banned overhead by the manufacturer’s own rating. For coatings, polarity, and naming conventions, our guide on what electrodes in welding actually are covers the full A5.1 family tree, and position ratings for common rods are summarized in this Hobart Brothers welding position poster.

E6010: The Deep-Penetrating All-Position Workhorse

E6010 is a cellulose-coated, DCEN (straight polarity) electrode with a forceful, digging arc that punches through mill scale, rust, and root openings. It is rated all-position and is the industry-standard pipe root electrode, the rod pipeline inspectors expect on an open root. It freezes fast, giving short, controlled pools even when the puddle points at your boots overhead or runs uphill on a fixed 5G line. The tradeoff: a violent arc that blows through thin metal, slag that pops and sparks, and a deposit that demands fast travel and a steady hand.

Use it for pipe roots, open-root plate grooves, welding through paint and scale, and downhill roots where the WPS allows. For technique, see push or pull stick welding — E6010 is almost always dragged.

E6011: The AC Field-Repair Rod

E6011 is E6010’s more forgiving sibling: a cellulose-potassium coating that runs on AC as well as DCEN, so it is the rod you load when the truck machine is an AC buzz box or you cannot confirm polarity. It is also all-position and digs hard, making it the classic maintenance and farm electrode for dirty, rusty, or slightly painted surfaces and for structural root passes when the machine cannot hold DC. Welders who came up on equipment repair often know E6011 and a 6010 for roots and little else, and they are not wrong about how far those two rods get you.

E6013: The Beginner-Friendly Thin-Metal Rod

E6013 uses a titania (rutile) coating that produces a soft, quiet, easy-starting arc with little spatter and a smooth, glossy bead. It runs on AC or DC and, although its position digit technically allows all positions, in practice it is a flat, horizontal, and vertical-down rod. Vertical-up with 6013 is a slog — the arc is too soft and the pool too fluid to fight gravity. It is the standard first rod in welding school because it forgives a long arc, and it suits thin sheet where a 7018 would melt the edges away. For settings and blow-through fixes, read stick welding sheet metal.

E7018: The Low-Hydrogen Structural Standard

E7018 is the structural welder’s bread and butter: a basic (low-hydrogen) iron-powder coating run on DCEP, rated all-position, with a quiet arc and excellent mechanical properties. On plate it is the fill-and-cap rod after a 6010 or 7010 root; on pipe the common combinations are E7010 with E7018 and E6010 with E7018 — see our pipe welding procedures guide for how those passes stack on 5G and 6G joints. Technique-wise, 7018 wants a short arc, stringer beads, and a slow steady drag with a slight weave on cover passes. Because it is position 1 it is legal overhead, and our overhead stick welding guide explains why 3/32 or 1/8 E7018 is the usual choice on your back under a beam. Exact settings matter more here than with any other stick rod: the numbers are in 3/32 E7018 amperage and 5/32 E7018 amperage.

E7024: High-Deposition Flat and Horizontal Only

E7024 is the opposite of an overhead rod. Its position digit is 2, flat and horizontal only, and its heavy iron-powder flux dumps metal fast behind a shielded arc you can drag or push. On tank shells, horizontal fillets on beam flanges, and ship shop work, nothing deposits filler faster in flat. You pay for that speed with a slag-heavy bead and zero versatility: put it overhead and the molten iron powder falls on you. It is a rod for fixtures, jigs, and a machine set up in one position all shift.

Amperage Ranges by Rod Diameter

Manufacturer charts are starting points, not gospel — always adjust for position, thickness, and heat sink:

One rule applies across every row: the harder the position, the lower the amperage. Vertical and overhead runs typically come down 10 to 15 percent from the flat setting, and you step down a rod diameter when the position gets ugly.

Why Position Limits Are Printed on the Box

That position digit is not marketing. It is the manufacturer’s certified capability, and once your WPS calls for a rod in a given position, the box becomes a compliance document. An inspector can legitimately reject a 4F fillet capped with E7024, because the consumable is not rated for it, however good the bead looks. Reading the box first saves the second problem every welder faces: burning a rod, chipping the slag, and discovering the position was never allowed. Position capability is also what welder qualification tests certify — the subject of the next section.

Certification and Qualification: What Positions a Welder Test Actually Covers

Here is the question behind the question. A welding certificate does not say “can weld.” It says exactly which positions, which processes, which materials, and which joint types a given welder has proven on a cut-and-tested coupon. Understanding how that sentence gets written is the difference between showing up to a job site qualified and showing up to retake a test you thought you already passed.

How AWS D1.1 Plate Qualification Works

For structural steel in the United States, the governing document is AWS D1.1, and the position rules live in Table 6.10. The logic is simple and deliberately practical: harder positions qualify easier ones. A welder who proves control with molten metal fighting gravity in the vertical and overhead positions is assumed to be competent in flat and horizontal, because those are the positions where gravity works for you instead of against you.

That is why 3G and 4G groove tests are the backbone of structural qualification, and why 1G and 2G alone leave gaps in a welder’s résumé. A simplified view of how the ranges stack looks like this:

Notice the catch: passing 3G does not hand you 4G, and passing 4G does not hand you 3G. Welding schools and testing facilities almost universally run both coupons back to back for exactly that reason. This is also why one position test can cover groove and fillet work at the same time — a welder who tests 3G/4G groove often walks away with a certificate reading “groove and fillet, all positions” without ever running a separate fillet coupon. Full descriptions of these designations are covered in our pipe welding procedures guide.

According to trade school certification listings, the most commonly earned SMAW plate certificates are 3G, 4G, and the combined 3G/4G qualification, with 6G following close behind for welders aiming at pipe work.

What a Test Coupon Actually Looks Like

A typical D1.1 plate test coupon is 3/8 in thick mild steel plate, beveled to a 45-degree included angle, tacked into a groove, and welded in the position being tested. Most shops run an E7010 or E6010 root pass and fill and cap with E7018 filler, though pure E7018 root passes are common on plate tests where the WPS calls for them.

Once welded, the coupon goes through visual inspection first, then destructive side-bend testing (or radiographic testing where the code allows it). Under D1.1 visual acceptance criteria:

• No cracks of any kind, anywhere on the face, root, or broken bend surface.
• Craters filled to the full cross-section of the weld.
• Reinforcement not exceeding 0.125 in above the plate surface.
• Undercut not exceeding 0.031 in deep.
• No lack of fusion revealed by the bend specimen, and porosity within code limits.

A single crack or a crater left open is enough to fail the entire coupon, no matter how pretty the rest of the bead looks.

ASME Section IX, 6G, and Pipe Qualification

Pressure piping plays by a different rulebook. Under ASME Section IX, position is an essential variable for groove welds under QW-303, while QW-302 governs fillet positions, where the restrictions are far lighter. The star qualification is the 6G coupon: pipe fixed at a 45-degree angle, welded through compound positioning. Passing a 6G test under ASME Section IX gives an all-position SMAW qualification, and a 6G coupon is accepted in lieu of 5G — but not the other way around. A 5G test does not unlock 6G work.

On the union and shop side, the well-known UA-1 test requires a 6-inch schedule 40 carbon steel pipe welded in the 5G position (pipe fixed horizontal, welder passing through flat, vertical, and overhead in one continuous weld), with an E6010 root and E7018 fill and cap. For pipeline work specifically, API 1104 governs qualification, and many pipeline contractors run their own additional performance tests on top of it.

For a deeper walkthrough of coupon prep, WPS callouts, and inspection sequencing, the full pipe welding procedures and inspection guide covers the process end to end, and OSHA’s welding, cutting, and burning page covers the safety obligations that apply during any test or production weld.

The practical takeaway: when a foreman asks “what positions are you certified in,” the honest, employable answer names the coupon and the range it covers. “3G and 4G plate groove, all positions, continuity current” tells a hiring shop everything they need to know in one sentence — and it is the sentence that wins the bid.

Common Position-Related Mistakes, Defects and How to Fix Them

Every welder who has failed a test has a story about the coupon that got away, and position work is where those stories start. The puddle sags in horizontal, overhead punishes a long arc, and a good-looking weave can hide a slag pocket in vertical-up. The reassuring part: position defects are rarely mysterious. They come back to five variables — arc length, travel speed, electrode angle, amperage, and the rod you loaded for the position.

The Five Root Causes Behind Almost Every Position Defect

Before mapping defects to positions, know what causes them:

• Arc length. Too long means an unstable arc, excess spatter, and poor penetration control; overhead is least forgiving.
• Travel speed. Too fast creates undercut and thin, high beads; too slow creates buildup, sagging, and burn-through.
• Electrode angle. Work angle steers the puddle; travel angle controls penetration. Wrong angles cause asymmetrical fillets and undercut at the toes.
• Amperage. Too hot, too cold, or wrong for the rod diameter and thickness — usually the first thing an inspector tells you to change.
• Wrong electrode. A fast-freeze E6010 shines overhead but struggles on a wide horizontal cover pass; a freeze-friendly E7018 needs short, controlled ripples and misbehaves if rushed.

Flat Position (1F/1G): Burn-Through, Excessive Penetration, Wrong Work Angle

Flat is the easiest position, which is why welders get sloppy. Burn-through on thin plate comes from excess amperage, slow travel, or a long arc: step down the amps, speed up, and use a smaller rod — our burn-through fixes guide lists the settings. Excessive penetration on heavy plate shows as a concave face or a sunk bead; back off the amps. Pointing the rod into the joint root piles heat in the corner and starves the toes, so aim at the middle of the fillet. In grooves, keep the arc in the root so the puddle wets both bevels. For thin-stock fill, see stick welding sheet metal.

Horizontal (2F/2G): Undercut, Overlap, and Sagging

Undercut along the top toe is the most common horizontal failure: a long arc, the rod held too high, or travel too fast gouges the top edge unfilled. Shorten the arc, slow down, and angle the rod upward so the puddle climbs and fills the toe. Overlap, or rope-on, on the lower plate is the opposite: travel too slow and too cold, letting metal run ahead and freeze unfused. Overlap and undercut sharing one bead means the work angle is wrong. Sagging in a horizontal groove means too much metal per pass; use smaller stringers rather than one wide weave, at reduced amperage. For acceptance limits, see our welding defects undercut guide.

Vertical (3F/3G): Trapped Slag, Lack of Fusion, Too-Hot Weaves

Vertical-up separates professionals from beginners, and the classic failure is a weave too wide and too hot. As Hobart Brothers’ position data and every filler-metal manufacturer stresses, a weave should not exceed roughly three electrode diameters. Wider than that, and the leading edge freezes ahead of the arc, trapping slag — which shows up as slag inclusions and lack of fusion at the toes on a bend test. The fix: stringers or a tight weave, short controlled ripples, and a puddle that washes the sidewalls before you move. Glassy, unfused toes mean too much heat or edge-racing travel; drop the amps 10 to 15 percent below flat settings. Vertical-down is for thin, nonstructural work only, never a D1.1 groove requiring vertical-up.

Overhead (4F/4G): Excessive Buildup, Porosity, Spatter, Long Arcs

Overhead is where gravity files its complaints, and a long arc is the usual culprit: it wrecks droplet transfer and traps flux gas as spatter and porosity. Fix it: tightest arc you can hold, smallest practical rod (3/32 or 1/8), amps reduced from horizontal, and fast ripples that freeze before the puddle sags. Excessive buildup means travel too slow and current too high — the puddle balloons and hangs. Porosity at stops usually means an unfilled crater or an arc struck too far from it. Our overhead stick welding guide covers 4F and 4G rod by rod.

Symptom → Cause → Fix: The Quick Reference Table

When the Bend Test Tells the Truth

A second-year apprentice ran a 3G root, fill, and cap in E7018 that looked clean under the slag and passed visual. The side-bend tests — the standard mechanical acceptance test for AWS D1.1 plate qualification, where cut coupons are bent to expose internal soundness — came back split, with a glassy line along one toe. The cause: a three-quarter-inch weave run on flat-production amps, so slag folded in at every toe. He retested with stringers, amps down 15 percent, and a tighter arc; both bends came out sound.

That is the whole lesson: defects are not bad luck, they are readable symptoms of a correctable variable. Learn to read them on the coupon before an inspector does, and every position in this guide becomes more forgiving.

SMAW vs Other Processes by Position: Where Stick Wins and Where It Doesn’t

Stick welding’s all-position reputation is real, but it is not the whole story. Every process has positions it loves and positions it hates, and choosing the wrong one costs time, money, or a failed inspection. Here is the honest comparison of SMAW against GMAW (MIG), FCAW, GTAW (TIG) and SAW across flat, horizontal, vertical and overhead work.

Process-by-Position Capability Table

SMAW is not the only all-position process on paper. The difference is under what conditions it stays all-position, and that is where stick separates itself from the pack.

Where SMAW Wins

Outdoors and wind. Gas-shielded processes live and die by shielding gas control. Even a modest breeze can blow an argon/CO2 mix away from a GMAW arc and leave porosity. SMAW’s flux coating generates its own protection at the arc, which is why stick is the default for field work, bridges, shipyards and pipeline construction where windbreaks are impractical. The Hobart Brothers position poster and most structural references make the same point: the flux coating is what buys SMAW its all-weather credibility.

Dirty or rusty base metal. MIG on mill scale or light rust gives porosity and a wandering arc. The aggressive arc action of E6010 and E6011 rods cuts through contamination, which is why stick dominates maintenance and repair on equipment nobody had time to grind clean.

Open-root pipe. For field open-root pipe roots, E6010 stick is still the industry standard. Its deep-penetration arc and the welder’s ability to feel the keyhole give control that short-circuit MIG cannot reliably match in a fixed 5G or 6G position. For more on how this plays out across passes, see our guide to pipe welding procedures, WPS and positions.

Portability. A stick rig is a power source, a holder, a ground clamp and a box of rods. No bottle, no regulator, no liner, no drive rolls. A welder can carry it up a tower or into a trench, and every extra wire-feed component is one more thing that fails at the worst moment.

Where SMAW Loses

Deposition efficiency. SMAW loses a meaningful share of every rod to the stub and the slag you chip away. Wire processes run near 90 percent or better, with no stub loss. On flat production work, that shows up directly in pounds per hour.

Speed in flat and horizontal. GMAW and FCAW are simply faster there: higher travel speeds, continuous wire feed, no stop-start rod changes. A fab shop running flat girth welds or horizontal fillets beats stick times almost every time. For the technique side, our flux core welding tips cover cleaner, stronger welds.

Spatter and stop-start fatigue. Stick throws spatter you chip and grind, and a rod burns only 9 to 14 inches before you swap electrodes. Properly set short-circuit MIG on thin material comes out nearly clean, and a wire feeder just keeps going on a long fillet.

SAW is the outlier. Submerged arc is essentially limited to flat and 1G rotated pipe because the granular flux blanket has to sit on top of the pool. Turn the joint vertical or overhead and the flux falls off, taking shielding with it. Higher deposition does not buy position freedom.

A Real Scenario: Bridge Field Splice vs Shop Fabrication

Picture a steel bridge retrofit. Shop sections arrive pre-welded, where a MIG or FCAW setup on a boom arm makes short work of flat and horizontal fillets. Then the erection crew bolts the sections up and faces a vertical-up groove splice plus an overhead fillet under the deck, in the weather, 80 feet up. That weld gets stick. The crew carries rod, not cylinders, the inspector knows E7018 low-hydrogen handling rules apply, and the qualification records line up with the D1.1 positions covered earlier. Two positions, two processes, one job that succeeds because someone matched the process to the position and the conditions.

The safety angle matters too: every process changes your PPE and hazard profile, so review the current welding PPE requirements before switching between them on one job.

The bottom line: SMAW is not the fastest process, but the most versatile under real-world conditions. If you master one process for field work, make it stick: every position, every weather, every material condition you will actually meet.

Practical Tips, Training Path and Final Takeaway

By now you know the answer: SMAW can be performed in all four plate positions — flat, horizontal, vertical and overhead — and in every pipe position from 1G through 6GR. Knowing it and doing it are two different things. Here’s how to turn that knowledge into skill, and skill into a paycheck.

The Beginner’s Practice Ladder

Don’t try to run everything at once. Stick welding rewards patience, and a logical progression builds each skill on the last:

1. 1F pads — Flat fillet beads on plate. Learn puddle control, arc length and travel speed without fighting gravity. Run stringers until they look like stacked dimes.
2. 2F — Horizontal fillets. Tilt the work angle up slightly and learn to keep the arc on the upper toe.
3. 3F vertical-up — First real gravity fight. Small Z-weaves or stringers, reduced amperage, steady upward progression.
4. 4F overhead — The mental hurdle. Shortest arc of any position, smallest rod, tight puddle. See our overhead stick welding guide for the full technique breakdown.
5. 3G and 4G plate tests — Groove welds with fill and cap passes. This is your structural ticket.
6. 5G pipe — Fixed pipe forcing flat-to-overhead transitions in one weld.
7. 6G pipe — The 45-degree compound-angle test that qualifies you nearly everywhere.

Welders holding both 3G/4G plate and 6G pipe SMAW qualifications have the broadest employability in the trade. That combination opens structural steel, pipeline, plant maintenance and shutdown work simultaneously.

Body Positioning and Ergonomics: The Underrated Skill

Great stick welders aren’t just hand-eye athletes — they’re comfortable. Tension shakes; comfort steadies.

• Brace both hands. Rest a wrist or forearm on the fixture, but never on live work — weld a temporary bracket or use a clean, grounded rest.
• Support your elbow during vertical and overhead passes. A supported elbow is a smooth travel hand.
• Move your whole body on long seams rather than reaching. If your arm is fully extended, stop and reposition.
• Overhead mirror work: you can’t see the arc head-on without tipping your helmet back. Work your rod at a slight angle so you watch the puddle through the lower portion of your lens, and keep your body off to the side of the spatter line.
• Stay hydrated and take breaks. Most overhead test failures happen in the last third of the coupon, when fatigue kills arc-length discipline.

PPE and Safety: Non-Negotiable in Every Position

Position changes your exposure. Overhead means falling spatter and slag; vertical-up means fumes rising straight into your breathing zone. OSHA requires employers to control welding fumes, provide eye and face protection, and manage electric-shock and hot-work hazards — but your own habits do most of the protecting.

• Helmet and lens: auto-darkening helmets with the correct shade for your amperage range.
• Fire-resistant clothing: leather sleeves and jacket, especially overhead, plus our full welding PPE guide breaks down every layer.
• Respiratory protection: ventilation or a supplied-air respirator for low-hydrogen and stainless work, where fumes are worst.
• Insulated gloves and dry stance: electric-shock risk climbs when you’re leaning on steel in sweat-soaked clothes. If you’ve ever wondered why MIG welding safety rules mirror stick rules so closely, this is one shared hazard.
• Hot slag discipline: chipping slag is the number-one cause of eye injuries among stick welders. Glasses on, even after the arc stops.

For a deeper dive into every layer of protection, see what a welder actually wears on the job.

Build a Qualification Matrix

A qualification matrix is simply a spreadsheet listing every process, position, material and thickness you’re certified in, with expiry dates. It sounds bureaucratic, but welders who carry one get hired faster because they can answer a recruiter’s question in ten seconds instead of digging through paperwork. Track your continuity — AWS D1.1 requires documented welding within the preceding six months to maintain qualification — and update it the day you pass a new coupon.

The Direct Answer, One Last Time

SMAW can be performed in the flat, horizontal, vertical and overhead positions on plate — designated 1F/1G, 2F/2G, 3F/3G and 4F/4G — and in all pipe positions including 1G, 2G, 5G, 6G and 6GR. That full-position range, paired with stick’s portability and tolerance for wind, dirt and field conditions, is why structural steel, pipeline and maintenance employers keep asking for it. Master vertical-up with E7018, keep your arc short overhead, run your practice ladder in order, and qualify 3G/4G plus 6G — and you’ll never be the welder who cost a crew a week of re-testing.

Ready to turn positions into a career path? Start with is stick welding hard — an honest beginner’s guide, then follow up with our pipe welding procedures guide as you head toward 5G and 6G.

Frequently Asked Questions

Can SMAW be performed in all welding positions?

Yes. Shielded Metal Arc Welding is a true all-position process — it can be run in flat (1F/1G), horizontal (2F/2G), vertical (3F/3G) and overhead (4F/4G) on plate, and in pipe positions 1G, 2G, 5G and 6G. Position limits on a job come from the WPS, the electrode and the welder’s qualification, not from the process itself.

What is the hardest position to weld with a stick electrode?

Overhead (4F/4G) and fixed-pipe 6G are generally considered the hardest. Overhead fights gravity with a molten puddle directly above your hood, requiring a short arc, reduced amperage and a small diameter rod. 6G adds compound angles on a fixed 45-degree pipe so the welder passes through several positions in one continuous weld.

Which SMAW positions does an AWS D1.1 3G and 4G test qualify me for?

A 3G (vertical) and 4G (overhead) groove test is the standard combination for structural plate work and covers the demanding out-of-position plate ranges under AWS D1.1. The exact extent — including fillet positions — is defined in D1.1 Table 6.10, so confirm your test report’s position column before starting a job.

Does a 5G pipe test qualify me for 2G?

No. A 5G coupon (horizontal fixed pipe) takes you through flat, vertical and overhead, so it qualifies 1G, 3G and 4G but leaves horizontal 2G uncovered. If you need 2G, you must test separately on a 2G coupon or pass the 6G test, which covers all pipe positions and is always accepted in lieu of 5G.

What electrodes can be used in every position?

Common all-position stick electrodes include E6010, E6011, E6013, E7018 and E7024-classified all-position variants. Look at the position digit in the AWS classification: a ‘1’ in that slot (like E7018 and E6010) means the rod is rated for all positions, while a ‘2’ means flat and horizontal only.

Do I have to weld vertical-up or can I run vertical-down?

Both exist, but they are not interchangeable. Vertical-down is fast and common on thin material and downhill pipe runs, while vertical-up gives deeper penetration and more reliable fusion and is required for most structural groove weld qualifications. Always follow the progression specified in the WPS — changing it can invalidate the qualification.

Why is SMAW still used when MIG is faster?

Stick welding needs no shielding gas bottle, tolerates wind, rust, paint and out-of-position work, and is the practical choice for field repair, open-root pipe and restricted access. Wire processes win in flat and horizontal shop production, but SMAW remains the most versatile all-position process for field and heavy structural work.

How do I get certified to weld in all positions?

Two paths cover most work: pass AWS D1.1 plate groove tests (typically 3G and 4G) for structural steel, and pass an ASME Section IX 6G test for pressure piping, which grants all-position SMAW qualification. Bring your WPS, wear required PPE, and expect visual inspection followed by side-bend or radiographic testing.