ASTM A335 – Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service Grade: P91 Elements Composition Carbon 0.08-0.12 Manganese 0.30–0.60 Phosphorus 0.020 Sulfur 0.010 Silicon 0.20-0.50 Chromium 8.00–9.50 Molybdenum 0.85–1.05 Others V: 0.18–0.25 N: 0.030–0.070 Ni: 0.40 Al: 0.02 Cb: 0.06–0.10 Ti: 0.01 Zr: 0.01   Tensile Requirements Tensile strength, min ksi [Mpa] 85[585] Yield strength, min:…