AWS B2.1-5A-223:1999

Standard Welding Procedure Specification (WPS) for Shielded Metal Arc Welding of Chromium-Molybdenum Steel (M-5A/P-5A), ER9018-B3, 1/8 Through 1/2 in. Thick, As-Welded Condition, 1/8 Through 1-1/2 in. Thick, PWHT Condition, Primarily Pipe Applications

American Welding Society , 01/01/1999