ASTM A105: American Society for Testing and Material Carbon Steel Forgings for Piping Applications Chemical Requirements Element Composition, % Carbon 0.35 max Manganese 0.60–1.05 Phosphorus 0.035 max Sulfur 0.040 max Silicon 0.10–0.35 Copper 0.40 max Nickel 0.40 max Chromium 0.30 max Molybdenum 0.12 max Vanadium 0.05 max Columbium 0.02 max Mechanical Properties Tensile strength, min, psi [MPa] 70 000 [485] Yield strength, min, psi [MPa] 36 000 [250] Elongation in 2 in. or 50 mm, min, 30 %: Basic minimum elongation for walls 5?16 in. [7.9mm] and over in thickness, strip tests. When standard round 2-in. or 50-mm gage length or smaller proportionally sized specimen with the gage length equal to 4D is used 22 For strip tests, a deduction for each 1?32 -in. [0.8-mm] decrease in wall thickness below 5?16 in. [7.9 mm] […]