ASTM A335 – Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service Grade: P12 Chemical Requirements  max  % Elements Composition Carbon 0.05 – 0.15 Manganese 0.30–0.61 Phosphorus 0.025 Sulfur 0.025 Silicon 0.50 Chromium 0.80 – 1.25 Molybdenum 0.44 – 0.65   Tensile Requirements Tensile strength, min ksi[Mpa] 60[415] Yield strength, min: ksi[Mpa] 32[220]   Elongation Requirements Longitudinal  Transverse…