... :bright and black painting 2.Material:P5, P11, P91, P22, T91, 12Cr1MoVG ASTM A335 P91 Seamless alloy steel pipe1. Alloy steel ... pipe, chemical and petroleum and so onMaterial12Cr1MoV, 15CrMo, Cr5Mo, P91, T91, P2, P5, P11, P12, 35CrMo, 42CrMo, 40CrMnMo, Cr9Mo, Cr2Mo, 20CrMn ...