a387 grade 12 class1 welding

SA 387 Grade 11 Class 1 Welding

Apr 20, 2013 · SA 387 Grade 11 Class 1 Welding. By 803056 Date 04-16-2013 18:12 Edited 04-16-2013 18:23. The carbon equivalency doesn't look that high, but if your research suggests preheat and post weld heat treat is required, there is probably a good reason for doing so. By the way, GMAW and FCAW are separate processes. A387 GRADE 12 CLASS 2|A387 Gr.12 CL.2|A387GR12CL2 ASTM A387 Gr 12 CL 2 is a chromium molybdenum alloy steel plate intended primarily for welded boiler and pressure vessels designed of elevated temperature service. The Cr content 1.00% and the Mo content 0.5%. Each grade except grade 21L, Grade 22L, Grade 91 and Grade 911 is available in two classes of tensile strength levels.