ASME Section II Part C SFA-5 Welding Consumables Specification: SFA-5.1 SMAW / SFA-5.5 Low-Alloy / SFA-5.18 GMAW / SFA-5.20 FCAW Procurement Guide for Pressure Vessel Fabricators
ASME Section II Part C SFA-5 welding consumables specification governs electrode, filler metal, and flux for pressure vessel + boiler fabrication. 6 critical SFA-5 specifications (5.1 SMAW carbon / 5.5 SMAW low-alloy / 5.17 SAW carbon / 5.18 GMAW / 5.20 FCAW / 5.23 SAW Cr-Mo) + 5-position classification system + base-material selection quick reference (SA-516 / SA-387 / SA-203 / SA-353 / SA-240 / S31803) + 7-step procurement decision framework + 5 common mistakes.