... X40, X60, A312, 304, 316 etcE: Conforms to international standards, like: ASTM A53, ASTM A500, ASTM A513, ASTM A312, BS1387, DIN2391, DIN2394, DIN17175, JIS G3452, EN10210 ... thickness of 3~30mmStandardGB/T8162,GB/T8163 and DIN/JIS/ASTM standarda. DIN Standard 10#(ST37-2,ST35-8),20#( ... -C,A210-A-1,A315-B,AISI1020),45#(AISI1045), 16mn(ASTM A210-C) etc.Usageboiler use,water transport, building, machinery, ...