AWS B2.1-4-218 : 2021 Title: (SWPS) FOR SHIELDED METAL ARC WELDING OF CHROMIUM- MOLYBDENUM STEEL (M-4/P-4, GROUP 1 or 2), E8018-B2, 1/8 THROUGH 1/2 IN. THICK, AS-WELDED CONDITION; 1/8 THROUGH 1-1/2 in. THICK, PWHT CONDITION, PRIMARILY PIPE APPLICATIONS Year: 2021 Publisher: American Welding Society Availability: Within 1-2 working days