PDF Standards AWS B2.1-22-015:2011
Standard Welding Procedure Specification (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
standard by American Welding Society, 07/07/2010