... JISB2312 JISB2313, BS, GB, ISOMaterial --Carbon steel --ASTM A234WPB,,A234WPC,A420WPL6. 20#,Q235,10#,20#,A3, ... ASTM A234 WP12,WP11,WP22,WP5,WP9,WP91,16MnR, Cr5Mo, 12Cr1MoV, 10CrMo910,15CrMo, 12Cr2Mo1; ASTM A335 P5, P9, P11, P12, P22, P91 ASTM A860 WPHY ... 70, WPHY 65, WPHY 60, WPHY 52,WPHY 46,WPHY 42, etc .Qualification ...