AWS B2.1-1-007 : 2002 Title: STANDARD WELDING PROCEDURE SPECIFICATION (SWPS) FOR; GAS TUNGSTEN ARC WELDING OF GALVANIZED STEEL (M-1), 18 THROUGH 10 GAUGE, IN THEAS-WELDED CONDITION, WITH OR WITHOUT BACKING Year: 2002 Publisher: American Welding Society Availability: Within 1-2 working days