Does passing a groove weld WPQ test qualify a welder for fillet welds?

Yes. Under AWS D1.1:2025, a welder who passes a groove weld performance qualification test is also qualified to make fillet welds in the same or less restrictive positions. A 3G (vertical groove) qualification, for example, extends fillet weld qualification to the F1 (flat), F2 (horizontal), and F3 (vertical) fillet positions. A groove test does not automatically qualify all fillet positions — it qualifies those equal to or less restrictive than the groove position tested. Rule library based on AWS D1.1:2025; verify against your governing edition.

What test is required for fillet-weld-only WPQ under AWS D1.1:2025?

A welder qualifying only for fillet weld work must complete a fillet weld break test or a macro examination of a fillet weld test assembly. The test weld is made on a T-joint in the applicable position. The break test fractures the weld to evaluate root fusion and internal discontinuities. The macro examination sections the weld and evaluates throat and fusion at the weld cross-section. Either method is acceptable per AWS D1.1:2025.

How many positions does a fillet-only WPQ qualify?

A fillet weld test in the 2F (horizontal) position qualifies for F1 and F2 positions only. Testing in the 3F (vertical) position qualifies F1, F2, and F3. Testing in the 4F (overhead) position qualifies all four fillet positions: F1, F2, F3, and F4. There is no 1F test that extends coverage beyond the flat position, so F4 is the broadest single test for fillet-only qualification.

Does fillet WPQ qualification also cover groove welds?

No. A fillet weld performance qualification test under AWS D1.1:2025 does not extend to groove weld work. To qualify for CJP or PJP groove welds, the welder must complete a groove weld qualification test appropriate to the process, position, and base metal thickness.

Fillet Weld WPQ Under AWS D1.1: What Tests Qualify What

A welder qualified on groove welds also qualifies for fillet work — but fillet-only qualification has limits. Here is the test matrix under AWS D1.1:2025.

Structural steel fabrication is predominantly fillet welds. Beam-to-column connections, shear tabs, gusset plates, stiffeners, and base plate fillet welds make up the bulk of weld joints in most fab shop output. The performance qualification requirements for the welders making those welds are different from groove weld qualification — and the qualification range rules create combinations that are easy to misread.

Two Paths to Fillet Weld Qualification

Under AWS D1.1:2025, a welder can be qualified to perform fillet welds by either of two routes:

Route 1 — Groove weld WPQ test: A welder who passes a groove weld performance qualification test is automatically qualified to make fillet welds in the positions covered by that groove test. This is the most common route in structural fab shops because groove weld tests are more demanding and provide broader coverage.

Route 2 — Fillet weld WPQ test only: When a welder will make only fillet welds and no groove welds, a dedicated fillet weld qualification test can be used. This test is simpler than a groove weld test — it uses a T-joint configuration and requires either a break test or a macro examination rather than the destructive bend and tensile tests used for groove weld PQR.

Most full-time structural welders should qualify via Route 1. A fillet-only qualification makes sense for welders with limited scope — fit-up welders, tack welders, or specialized fillet-weld operators who will never touch a groove joint.

Rule library based on AWS D1.1:2025; verify against your governing edition.

How Groove WPQ Position Coverage Extends to Fillet Welds

AWS D1.1:2025 defines a qualification range for groove welds tested in each position. That range also sets the fillet weld positions covered. The general pattern:

1G (flat groove): qualifies F1 fillet (flat)
2G (horizontal groove): qualifies F1 and F2 fillets
3G (vertical groove): qualifies F1, F2, and F3 fillets
4G (overhead groove): qualifies F1, F2, and F4 fillets (not F3)
3G + 4G (both): qualifies all four fillet positions

The logic reflects the position difficulty scale. A welder who can run a groove weld overhead can run a fillet weld overhead. A welder qualified only for flat groove work does not carry that to vertical fillet work.

The 4G-without-3G gap is worth noting: a welder who tests only 4G groove does not qualify for vertical-up fillet work (F3) under D1.1. If the production weld schedule includes both overhead and vertical fillet welds, the welder needs a 3G test in addition to 4G, or a combined 3G + 4G test.

For position qualification tables across processes, see welder qualification positions: 1G through 6G under AWS D1.1.

The Fillet-Only WPQ Test Procedure

When qualifying only for fillet welds, the test assembly is a T-joint made up of two flat bar pieces (minimum dimensions are specified in D1.1). The welder runs a fillet weld on each side of the T, in the applicable position. Two test methods are available:

Break test: The completed T-joint is loaded transverse to the weld axis until the weld fractures. The exposed fracture surface is examined for root fusion, porosity, slag inclusions, and other discontinuities. The weld is acceptable if the fracture shows evidence of complete root fusion and the total discontinuity area does not exceed the acceptance criteria in D1.1.

Macro examination: The T-joint is sectioned through the weld cross-section. The section is ground, etched, and examined to evaluate effective throat, fusion at the root and toes, and internal soundness. This method is more informative than a break test for evaluating weld profile and throat adequacy, but requires a prepared metallographic section rather than a simple break.

Either test method is valid. Shops with in-house macro capability often prefer the macro examination because it is more thorough. Shops without metallographic equipment use the break test.

What the Test Evaluates — And What It Does Not

A fillet weld break test or macro examination evaluates root fusion and internal integrity in the test position. It does not evaluate:

Ability to hold dimensional tolerances on large production weld sequences
Skill on CJP groove welds (different joint geometry, different test)
Out-of-position fillet skill for positions not tested
Ability to make fillet welds on thick sections if the test was on thin material

Welder qualification under AWS D1.1:2025 is a minimum competency standard. It does not substitute for a shop's own production quality system, operator training, and first-article verification on new joint configurations.

Thickness Coverage for Fillet WPQ

Welder performance qualification for fillet welds under AWS D1.1:2025 is not thickness-limited the way groove weld qualification is. A fillet weld qualification applies to fillet welds of all sizes on base metal of unlimited thickness, provided the test was made in the applicable process and position.

This is one of the practical advantages of fillet-only qualification tests: once you're qualified in a position, thickness range is not a requalification trigger. Compare this to groove weld qualification where the thickness of the test plate establishes an upper and lower bound for the production base metal thickness range — see WPS qualification range: thickness and position limits.

Process Coverage

A welder qualified on one process (SMAW, GMAW, FCAW, SAW, GTAW) is not automatically qualified on a different process. Fillet weld WPQ is process-specific. If a welder's WPQ was issued for FCAW-G and production needs change to SMAW fillet welds, the welder must complete a separate SMAW qualification.

Process changes are among the most commonly missed welder qualification gaps in audit reviews. A welder who has been doing SMAW fillet work for years and transitions to FCAW-G for a job's tack welds is technically unqualified for FCAW-G until a WPQ is on file.

WPQ Documentation for Fillet-Only Qualification

The welder performance qualification record (WPQ) for a fillet-only test must document:

Welder name and identification stamp number
Date of test
Process (SMAW, GMAW, FCAW-G, etc.)
Position(s) tested and positions qualified
Filler metal classification used
Base metal specification
Test method (break test or macro examination)
Test results and acceptance
CWI or qualified welding inspector name and signature

The WPQ should remain on file for the duration of the welder's employment and for any period required by the contract or quality management system. AWS D1.1:2025 requires that qualification remain current — a welder who has not welded the qualified process for six months or more must requalify before returning to production work on that process. For a detailed review of the continuity tracking requirements, see welder continuity tracking under AWS D1.1 Clause 6.4.1.

Common WPQ Gaps Found in Fillet Weld Programs

From field QA audits of structural fabrication shops, these are the most frequent fillet weld WPQ findings:

1. Position not verified before assignment: A welder's WPQ covers F1 and F2 (from a 2G groove qualification). Production assigns them to vertical fillet welds (F3). No one checked the qualification card.

2. Process mismatch: WPQ was issued for SMAW. Production switched to FCAW-G for the beam web fillet welds. WPQ does not cover the new process.

3. Expired qualification from lapsed welding: The welder was on leave or a different process for more than six months. The qualification lapsed. No requalification was performed before production resumed.

4. Missing filler metal documentation: The WPQ lists "low-hydrogen electrode" without specifying the AWS A5.1 classification. This makes it impossible to verify the filler metal qualified at the time of test.

5. Fillet test not witnessed: The test was run but the CWI's signature is missing from the WPQ. AWS D1.1:2025 requires the test to be conducted in the presence of or under the supervision of the inspector.

A digital qualification matrix that tracks each welder by process, position, and continuity date makes these gaps visible before an inspector finds them. See the welder qualification matrix and alert system for how this works in practice.

When You Need Both a Fillet and a Groove WPQ

The most complete coverage for a structural welder comes from qualifying on both a groove and a fillet test across multiple positions. In practice, most shops qualify welders on 3G + 4G groove tests, which collectively cover all four fillet positions plus vertical and overhead groove work.

For shops with welders doing only simple fillet work — floor welders making horizontal fillet connections on columns, for example — a 2F fillet-only WPQ is a faster and less expensive path to a qualifying document. It covers exactly what those welders do, with no over-qualification.

For a full picture of how WPQ records integrate with the overall documentation package — including how welder IDs tie to specific production weld joints — see welder ID stamps and production traceability under AWS D1.1.