Does AWS D1.1 stud welding qualification use the same Table 6.6 essential variables as SMAW or GMAW?

No. Stud welding is governed by its own chapter in AWS D1.1 (Chapter 7 in the 2025 edition) with its own qualification requirements. The stud type, base metal, and stud diameter are the primary qualification variables, not the same Table 6.6 rows that apply to arc welding processes.

What tests qualify a stud welding procedure under AWS D1.1?

AWS D1.1 requires bend testing and torque testing of production qualification studs. The number of test studs and the pass/fail criteria depend on the stud size and the qualification type (prequalified conditions or procedure qualification).

Does changing stud diameter require requalification?

Yes. Stud diameter is a primary variable for stud welding qualification. Qualifying with a 3/4 in diameter stud does not automatically qualify 7/8 in or 1 in diameter studs — each size may need its own qualification test or must fall within a range explicitly covered by the code.

Are ferrules required for all stud welding under AWS D1.1?

For drawn-arc stud welding, the ferrule (arc shield) is required by the code to control the weld bead geometry and protect the arc pool. Capacitor-discharge stud welding uses a different process mechanism and has different requirements. Confirm your stud system type before assuming ferrule requirements.

Stud welding qualification under AWS D1.1: what QC managers need

AWS D1.1 stud welding has its own qualification path separate from Table 6.6. Here's what CWI inspectors need to know about stud WPS requirements, testing, and production controls.

Shear studs on composite beams. Deck anchors on steel framing. Headed anchors on transfer structures. Stud welding is everywhere in structural steel fabrication and erection — but it operates under a separate qualification framework from conventional arc welding processes.

Most WPS conversations center on SMAW, GMAW, FCAW, and GTAW procedures qualified against Table 6.6. Stud welding falls under Chapter 7 of AWS D1.1:2025, which has its own qualification provisions, its own testing requirements, and its own set of variables that define what a given procedure covers in production.

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

Why stud welding is different

Drawn-arc stud welding uses a process entirely unlike shielded metal arc or flux-core welding:

The stud is held in a welding gun against the base metal with the ferrule in place.
A trigger fires a pilot arc, lifting the stud off the base metal to create the arc gap.
The main current discharge melts the stud tip and a corresponding pool on the base metal surface.
The gun plunges the stud into the molten pool. The ferrule contains the weld flash.
The weld solidifies in under a second. The ferrule is knocked off and the fused area is inspected.

Because the "weld" is essentially a single plunge event rather than a multi-pass procedure, the essential variables differ from conventional arc welding. There is no travel speed, no electrode feed rate, no interpass temperature to track pass-by-pass. The primary process variables are the stud material and diameter, the base metal, the equipment settings (lift height, current level, weld time), and the ferrule condition.

Chapter 7 qualification framework

AWS D1.1:2025 Chapter 7 establishes two paths to production qualification:

Prequalified conditions. The code defines a set of base metal, stud type, and equipment conditions that are accepted without a procedure test — provided the manufacturer's recommended settings are followed and the equipment is certified. This path is common for standard shear stud applications on ASTM A36 or A572 base metal with Type B studs meeting AWS D1.1 material requirements.

Procedure qualification test. When prequalified conditions don't cover the application — unusual base metal, stud-through-deck configuration, coated base metal, or non-standard stud geometry — a procedure qualification test is required. The qualification test produces a stud procedure specification (analogous to a WPS) supported by production test records (analogous to a PQR).

Before assuming prequalified conditions apply to your project, verify that:

The stud material and geometry meet the code's Type B or other specified classification
The base metal is in one of the code's listed groups
Through-deck conditions (if applicable) fall within the prequalified parameters
The equipment used is on the manufacturer's approved list for those settings

Primary qualification variables

For stud welding, the primary variables that define what a procedure covers are:

Stud type and classification. AWS D1.1 classifies headed anchors by geometry and base material. Changing stud type — for instance, from a standard headed shear stud to a bent stud or deformed shank stud — requires requalification.

Stud diameter. A procedure qualified with 3/4 in diameter studs covers a specific diameter range. Moving to a significantly different diameter requires new qualification testing. Check the specific diameter extension rules in Chapter 7 for the applicable range.

Base metal. The base metal group is a qualification variable. Qualification on A572 Grade 50 does not automatically cover HSLA or weathering steel grades with substantially different carbon equivalents.

Stud-through-deck vs. direct-to-steel. Installing studs through a formed steel deck is more difficult than direct-to-steel welding. The through-deck geometry affects arc behavior and puddle containment. This is a distinct qualification condition under Chapter 7.

Equipment type. The stud welding gun model and power supply are specified in the procedure. Changing equipment types — for example, from one manufacturer's drawn-arc system to another with different lift and time controls — may require requalification or verification of equivalent performance.

Testing requirements

Bend test

The standard production test for stud welds is a bend test. The inspector strikes or bends the stud approximately 30 degrees from vertical using a hand hammer or bending bar. A passing result means:

No cracking in the weld or the heat-affected zone
No separation from the base metal

The bend test is simple and fast, which is why it's the primary production control for stud welding. One operator typically tests a set number of studs per shift or per lot.

Torque test

For stud applications where bending would damage the finished structure, a torque test may be substituted. A calibrated torque wrench is applied to the stud shank and the torque is recorded. The code specifies the minimum torque value based on stud diameter.

Visual inspection

Every stud weld gets a visual inspection immediately after the ferrule is removed:

360-degree flash (full weld flash around the stud base) is the primary acceptance indicator
The flash should be uniform; bare spots indicate arc gaps or improper ferrule seating
Arc strike marks adjacent to the stud base are rejectable

For production work, AWS D1.1 also specifies how many studs per structure area require bend or torque testing, and what to do when a production test fails — including expanded testing on adjacent studs.

What the stud WPS must document

Unlike a conventional WPS that lists polarity, filler classification, and pass sequence, a stud procedure specification records:

Stud manufacturer and product designation
Stud base material specification and diameter
Base metal specification and thickness range
Ferrule type and size
Equipment model and certified settings (lift height, weld current, weld time)
Deck configuration (direct-to-steel or through-deck with deck type and orientation)
Position (flat-position application in most structural applications; overhead and inclined stud welding has separate provisions)
Any required preheat (unusual for most stud applications but required for some base metal groups at low temperature)

The stud procedure specification should be traceable to the qualification test records, just as a WPS is traceable to a PQR. In a third-party audit, the inspector will ask for both.

Common nonconformances in stud welding QC

No procedure specification on file. Shops that have used drawn-arc stud welding for years often rely on informal "just follow the gun settings" practice. When an AISC audit or third-party CWI review asks for the stud WPS, nothing exists. See common WPS deficiencies found in third-party audits for the full list of what auditors look for.

Through-deck not separately qualified. The ironworker crew qualifies stud procedure on direct-to-steel base metal, then installs studs through the deck in the field without a through-deck qualification test. These are different conditions under Chapter 7.

Bent stud procedure substituted for headed stud. Architect specifies headed shear connectors; the erector has a qualification for bent studs. These are different stud types and require separate qualification.

Ferrule damage or moisture. Ferrules stored improperly can absorb moisture, causing porosity in the stud flash. Some quality systems require ferrule control procedures similar to low-hydrogen electrode conditioning.

Expanded testing not triggered on failures. When a production test stud fails the bend test, AWS D1.1 requires expanded testing of additional adjacent studs. Shops that simply replace the one failed stud without triggering expanded testing are out of compliance.

Integration with your WPS library

Because stud welding uses a different qualification path than conventional arc welding, it's easy for it to fall through the cracks in a WPS management system built around SMAW, GMAW, and FCAW procedures. The stud WPS should be part of the same document control system as all other welding procedure specifications, with the same revision control and distribution tracking.

For shops that need to maintain qualification documentation across multiple processes — SAW for plate, FCAW for built-up members, stud welding for composite beams — keeping all procedures in a single auditable library is the most reliable approach. See WPS revision control best practices for how to manage procedure editions without losing PQR traceability.

Shops looking to bring stud welding documentation into an organized WPS system alongside their conventional arc procedures can start with the WPS software pricing page to see how a rule-based platform handles multiple process types under one audit-ready workflow.