Welding Wps Variables: GMAW
ASME BPVC Section IX and AWS D1.1 welding procedure specification (WPS) essential, supplementary essential, and nonessential variables for 8 processes (SMAW, GMAW, GTAW, FCAW, SAW, ESW, EGW, PAW) with QW variable numbers, requalification requirements, and P-number applicability
| welding process | variable key | P number applicability | QW variable number | description | notes | requalification required | typical range or limits | variable category | variable name | variable type |
|---|---|---|---|---|---|---|---|---|---|---|
| GMAW | essential#QW-403.11 | all | QW-403.11 | Change in the P-Number of base metal | Same rule as SMAW; QW-424 defines allowable combinations | yes | P-1 through P-15F; see QW-424 | base_metal | P-Number change | essential |
| GMAW | essential#QW-403.8 | all | QW-403.8 | Deposited weld metal thickness outside qualified range | Same thickness qualification rules as other arc processes | yes | Qualified range per QW-451 tables | base_metal | Thickness range | essential |
| GMAW | essential#QW-404.32 | all | QW-404.32 | Change from solid to flux-cored or metal-cored wire | Change between wire types requires new qualification | yes | Solid wire (GMAW); cored wire (FCAW-G or MCAW) are different processes | filler_metal | Filler metal diameter | essential |
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