... High pressure Boiler pipe St45.8 1.OD:21-711MM2.WT:1-60MM3.Length:5-12MBV&SGS Description15CrMo,34CrMo4,Cr5Mo Alloy steel pipe ... StandardASTM A213,A200,A335,DIN17175,JIS G3458 G3462, GB5310,GB6479,GB9948MaterialP1 ... ,P2,P5,P9, P11,P12,P22,P91,T1, ...