ASTM A-335, A-387 GR. P1, P5, P9, P11, P12, P22, P91 Size Range: 1/8″ – 26″ Schedules : 20, 30, 40, Standard (STD), Extra Heavy (XH), 80, 100, 120, 140, 160, XXH Alloy Steel contains substantial quantities of elements other than carbon such as nickel, chromium, silicon, manganese, tungsten, molybdenum, vanadium and limited amounts of…