AWS B2.1-22-015 : 2011 Title: (SWPS) FOR; GAS TUNGSTEN ARC WELDING OF ALUMINUM (M/P/S-22 TO M/P/S-22), 18 THROUGH 10 GAUGE, IN THE AS-WELDED CONDITION, WITH OR WITHOUT BACKING; SITE LICENSE Year: 2011 Publisher: American Welding Society Availability: Within 1-2 working days