AWS B2.1-1-021:1994

Standard Welding Procedure Specification for Gas Tungsten Arc Welding Followed by Shielded Metal Arc Welding of Carbon Steel (M-1/P-1/S-1, Group 1 or 2), 1/8 through 1-1/2 inch Thick, ER70S-2 and E7018, As-Welded or PWHT Condition
standard by American Welding Society, 01/01/1994

AWS B2.1-1-007:2002 (R2013)

Standard Welding Procedure Specification (Swps) for Gas Tungsten Arc Welding of Galvanized Steel (M-1), 18 through 10 Gauge, in the As-Welded Condition, with or without Backing
standard by American Welding Society, 01/01/2002