1.alloy steel pipes standard GB,DIN ,ASTM ASME ,JIS 2.8-1240 1- ... 4.,massive stock alloy steel pipes applies to petroleum,chemical industry ,electric power,boiler with its metits of high temperature resistant ,low temperature ... grade:P1,P2,P5,P11,P12 P22Useful:High-Temperature Service Seamless ferritic alloy-steel pipe for high-temperature service Chemical properties (%)MaterialCSiMnPSMoCr %%%%max ...