AWS B2.1.22.015 : 2002
AWS B2.1.22.015 : 2002
STANDARD WELDING PROCEDURE SPECIFICATION (SWPS) FOR GAS TUNGSTEN ARC WELDING OF ALUMINUM (M/P-22 TO M/P-22), 18 THROUGH 10 GAUGE, ER4043 OR R4043, IN THE AS-WELDED CONDITION, WITH OR WITHOUT BACKING
American Welding Society