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3/8" Weld Qualification Test Plate for AWS D-1.1 Limited Thickness with 1/4"x2" Backing Strip
This 3/8-inch AWS D1.1 limited thickness weld test plate is a code-compliant certification coupon...
Individual AWS D1.1 code-compliant weld test coupons only.
Does not include Authorization to Test sticker, WPS/PQR, or mail-in testing. Intended for in-house testing with your own inspector or as a replacement coupon for an existing test kit.
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This 3/8-inch AWS D1.1 limited thickness weld test plate is a code-compliant certification coupon...
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This 1-inch AWS D1.1 unlimited thickness weld test plate is a code-compliant certification coupon...
Before ordering a qualification kit, you will make four key selections.
Your qualification is based on:
Together, these define what you are legally qualified to weld under AWS D1.1.
A 3/8″ groove weld test is considered a limited thickness qualification.
If you pass a 3/8″ test, you are qualified to weld:
Best for: Most shop and field structural work under 3/4″ thick.
A 1″ groove weld test qualifies as an unlimited thickness qualification.
If you pass a 1″ test, you are qualified to weld:
Best for: Heavy structural, critical welds, and maximum employability.
We support the following AWS-recognized processes:
Commonly called stick welding.
Why choose it: Universally accepted, durable, and still heavily used.
Commonly called MIG welding.
Why choose it: Efficient, precise, and widely used in shop settings.
Often called dual shield.
Why choose it: High productivity and excellent mechanical properties.
Plate qualifications are position-specific.
Weld performed from the top side of a flat plate. Easiest position, lowest qualification coverage.
Plate is vertical; weld is horizontal. More challenging than flat, common in structural work.
Weld performed vertically. Qualifies you for 1G and 2G automatically. Major step up in skill.
✓ Covers: 1G, 2G, 3G
Weld from underneath. Most difficult. Does NOT qualify for 2G or 3G.
✓ Covers: 1G, 4G only
Because 3G and 4G do not overlap, welders who need full plate coverage must pass both: 3G (flat, horizontal, vertical) + 4G (overhead). Together, these two tests qualify you for all plate positions.
Your final qualification depends on:
That is why selecting the right combination up front matters—and why this guide exists.