AWS B2.1-8-025:2001 (R2012)

Standard Welding Procedure Specification for Gas Tungsten Arc Welding Followed by Shielded Metal Arc Welding of Austenitic Stainless Steel (M-8/P-8/S-8, Group 1), 1/8 through 1-1/2 inch Thick, As-Welded Condition
standard by American Welding Society, 10/31/2001

AWS B2.1-1-209:2019

Standard WPS for Gas Tungsten 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" Thick, ER70S-2 and E7018, As-Welded or PWHT Condition, Primarily Pipe Applications
standard by American Welding Society, 03/01/2019