1.alloy steel tubes and pipes standard GB,DIN ,ASTM ASME ,JIS 2.8-1240 1- ... 3. material:all kinds of alloy 4.,massive stock alloy steel tubes and pipes applies to petroleum,chemical industry ,electric power,boiler with its ... ,P2,P5,P11,P12 P22 Useful:High-Temperature Service Seamless ferritic alloy-steel pipe for high-temperature serviceChemical properties (%)MaterialCSiMnPSMoCr %%%%max%maxA ...