... JISB2311 JISB2312 JISB2313, BS, GB, ISOMaterial --Carbon steel --ASTM A234WPB,,A234WPC,A420WPL6. 20#,Q235,10#,20#,A3, Q235A, ... ,316,316L,321. 1Cr18Ni9Ti, 00Cr19Ni10,00Cr17Ni14Mo2, etcAlloy Steel --ASTM A234 WP12,WP11,WP22,WP5,WP9,WP91,16MnR, Cr5Mo, 12Cr1MoV, 10CrMo910,15CrMo, ... 12Cr2Mo1; ASTM A335 P5, P9, P11, P12, P22, P91 ,etc ...