... thickness of 3~30mmStandardGB/T8162,GB/T8163 and DIN/JIS/ASTM standarda. DIN Standard 10#(ST37-2,ST35-8),20#( ... .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,water transport ... please do not hesitate to let us know, thanks ASTM A106 Grade B carbon seamless steel pipe