ASTM A335 – Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service Grade: P9 Chemical Requirements  max  % Elements Composition Carbon 0.15 Manganese 0.30–0.60 Phosphorus 0.025 Sulfur 0.025 Silicon 0.25 – 1.00 Chromium 8.00 – 10.00 Molybdenum 0.90 – 1.10   Tensile Requirements Tensile strength, min ksi[Mpa] 60[415] Yield strength, min: ksi[Mpa] 30[205]   Elongation Requirements Longitudinal  Transverse…