Seamless Alloy-Steel Pipe 34CrMo4 standard:astm a335 grade:P1, P2, P5, P9, P11, P12, P21, P22, P91, P92 Seamless Alloy- ... Steel Pipe 34CrMo4Standard: ASTM A335Steel Gr.: P1, P2, P5, P9, P11, P12, P21, P22, P91, P92Usage: High temperature ... : T2, T5, T9, T11, T12, T22, T91, T92 A335: P1, P2, P5, P9, P11, P12, P21, P22, P91, P92 DIN17175: 15Mo3 ...