› › Aws B2 1 4 219 2021 Standard Welding Procedure Specification Swps For Gas Tungsten Arc Welding Followed By Shielded Metal Arc Welding Of Chromium Molybdenum Steel M 4 P 4 Group 1 Or 2 Er80s 82 And E8018 82 1 8 Inch 3 Mm Through 1 2 Inch 13 Mm Thick As Welded Condition; 1 8 Inch 3 Mm Through 1 1 2 Inch 38 Mm Thick Pwht Condition Primarily Pipe Applications