... A312, 304, 316 etcE: Conforms to international standards, like: ASTM A53, ASTM A500, ASTM A513, ASTM A312, BS1387, DIN2391, DIN2394, DIN17175, JIS G3452, EN10210 ... ,STPT49) etc.c. ASTM/AISI Standard10#(ASTM a106/53 Gr.B,A192,A179-C),20#(ASTM A106/53 Gr.B, A178-C,A210-A-1,A315 ... -B,AISI1020),45#(AISI1045), 16mn(ASTM A210-C) etc.Usageboiler use ...