ASTM A743 CF16Fa
Chemical Composition, weight % Carbon: 0.16 Max Manganese: 1.50 Max Silicon: 2.00 Max Phosphorus: 0.04 Max Sulfur: 0.20-0.40 Chromium: 18.0-21.0 Nickel: 9.0-12.0 Molybdenum: 0.40-0.80 Tensile Requirements Tensile Strength, ksi: 70 Min Yield Strength, ksi: 30 Min Elongation in 2 in.: 25% Min