Aluminum Welding Certification: Codes, Costs, and Renewal

Aluminum welding certification is a hands-on credential issued by the American Welding Society through its Certified Welder program, confirming that you can produce sound welds in aluminum alloys under a specific code, process, and position. You earn it by passing a performance test at an AWS Accredited Test Facility, and you keep it by welding in that process at least once every six months. The AWS application fee is $70, and the test facility charges its own separate fee for the practical exam.¹

There is no written exam. You weld a test coupon in front of a Certified Welding Inspector, following a Welding Procedure Specification exactly, and the coupon is then inspected and usually destructively tested. Pass, and AWS mails you a card that lists the exact process, position, base metal group, and thickness range you qualified on.

Which Code Applies to Your Work

The right code depends on what you plan to weld on the job.

Structural aluminum. AWS D1.2/D1.2M:2014, the Structural Welding Code—Aluminum, governs most structural aluminum fabrication in the United States. It covers any structure made from aluminum alloys except pressure vessels and pressure piping.² One important feature of D1.2 is that it does not allow prequalified welding procedures. Every joint detail and welding procedure has to be individually qualified and documented in a WPS, which is the paper you’ll be welding to on test day.³

Aerospace. Flight hardware falls under AWS D17.1/D17.1M:2024, the Specification for Fusion Welding for Aerospace Applications. It covers aluminum alongside titanium, nickel, and other alloy families and sets mandatory requirements for design, personnel qualification, fabrication, inspection, and acceptance.⁴ Inspection is tighter: radiographic and other non-destructive methods are standard rather than exceptional, and acceptance criteria for defects are stricter. A sensible path into aerospace work starts with a D1.2 qualification and then adds D17.1 through an employer or training program in that sector.

Pressure vessels and piping. Aluminum welding on pressure equipment is governed by ASME Boiler and Pressure Vessel Code, Section IX, which has its own performance qualification rules. If your job is pressure work, a D1.2 structural ticket does not cover you.

Picking Your Process and Position

The two aluminum processes recognized under the Certified Welder program are Gas Tungsten Arc Welding (GTAW, often called TIG) and Gas Metal Arc Welding (GMAW, often called MIG). Each is a separate qualification. Passing a GTAW test gives you nothing on the GMAW side, and vice versa.

GTAW is slower and demands more manual skill, since you feed filler rod with one hand while running the torch with the other. Precision fabrication shops lean on it. GMAW uses a continuously fed wire and runs faster, which suits production environments, though it brings burn-through risk on thin aluminum and spatter from erratic arc behavior.

Your test position controls what you’re allowed to weld in the field. The standard plate positions are:

1G, flat: the puddle sits on top of the joint, and gravity helps you.
2G, horizontal: the weld axis is horizontal and the puddle wants to sag.
3G, vertical: welding runs up or down a vertical surface.
4G, overhead: welding above your head, the hardest plate position.

Qualifying in a harder position generally covers the easier ones. Passing a 3G test typically qualifies you for 1G and 2G as well. Pipe tests (5G and 6G) broaden your eligibility further and are commonly required for industrial piping work. The 6G test, on a pipe fixed at a 45-degree angle, is widely considered the most versatile ticket you can hold.

Where to Test and What It Costs

Every AWS Certified Welder test has to be administered at an Accredited Test Facility. The ATF provides the equipment and a Certified Welding Inspector who holds the Welder Performance Qualification endorsement. The CWI running your test cannot be anyone who trained you on that process within the six months before the test date.⁵ AWS keeps an online directory of accredited facilities.

The AWS application fee is $70. Submitting the application any way other than through the online system adds a $125 non-refundable surcharge.¹ The ATF charges separately for the practical exam, and those fees vary by facility and region. Some ATFs include test plates and filler metal; others bill them on top. Ask before you book.

What Happens on Test Day

Before you touch a torch, read the WPS for your test. It specifies the base metal alloy and thickness, filler metal, shielding gas and flow rate, amperage range, travel speed, preheat, and joint geometry. Common test base metals include 6061-T6 and 5052-H32. Deviating from the WPS during the test is an automatic failure.

You weld the coupon under direct observation. The CWI watches your technique, confirms you’re inside the WPS parameters, and then inspects the finished weld. Visual inspection comes first: cracks, undercut, incomplete fusion, and excessive reinforcement on the surface will end the test there.

If the weld passes visual, the coupon goes to destructive testing. The usual method is the guided bend test, where the plate is cut into specimens and bent around a mandrel to a set radius. The bend opens up internal flaws that look fine on the surface, like lack of fusion between passes or trapped porosity. The specimens have to survive without cracks beyond a specified size. For aerospace and other high-criticality work, radiographic testing is used instead of, or alongside, bend tests to find subsurface defects without destroying the coupon.

The CWI completes the paperwork and submits your application, test results, and registration fee to AWS. The facility has up to two weeks after the test to send the package in.⁶

What Your Card Actually Covers

Expect your certification card and a stack of maintenance forms within two to three weeks of AWS receiving the paperwork.⁶ The card identifies the process, position, base metal group, and thickness range you qualified on, and your scope is limited to those essential variables.

If you tested on 3/8-inch 6061-T6 plate in 3G with GTAW, that’s your scope, plus the lesser positions your test position covers. A different alloy group, a materially different thickness, or a different process means a separate qualification test.

Keeping the Certification Active

Your qualification stays valid only as long as you can prove you’re still welding in that process. AWS requires you to use the certified process at least once every six months. Go longer than six months without it, and the qualification expires.⁶

You track this on the maintenance form that comes with your card. Every six months you submit the form to AWS, signed by a supervisor or quality control representative confirming you’ve been performing the work.

Miss the deadline and you get a 60-day grace period, but the certification is treated as expired during that window, so you technically can’t weld under it until it’s renewed. Submitting during the grace period costs a $50 late fee on top of the normal renewal.⁶ Blow past the 60 days and you lose the credential entirely. Getting it back means retesting from scratch: ATF fees, new plates and filler, and the hours in the booth and waiting on results.

Keep the continuity log current for another reason too. On code-governed projects, employers are expected to have continuity records available for review. If a weld is later questioned in an audit or safety investigation, inspectors ask for proof that the welder was qualified on the date the work was done. A gap on that date can invalidate the weld even if the joint is sound.

1
American Welding Society. Certification and Education Programs Price List 2026
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American Welding Society. D1.2/D1.2M:2014 Structural Welding Code – Aluminum
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American Welding Society. AWS D1.2/D1.2M:2008 Structural Welding Code – Aluminum
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American Welding Society. D17.1/D17.1M:2024 Specification for Fusion Welding for Aerospace Applications
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American Welding Society. Accredited Test Facilities
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American Welding Society. Certified Welder Program