Chemical Composition Base Element Fe (Iron) C (Carbon) 0.45 % (maximum) Cr (Chromium) 0.5 to 1.25 % Fe (Iron) 93.4 to 96.9 % (estimate) Mn (Manganese) 0.6 to 1 % Mo (Molybdenum) 0.2 % (minimum) Ni (Nickel) 1.65 to 3.5 % P (Phosphorus) 0.012 % (maximum) S (Sulfur) 0.015 % (maximum) Si (Silicon) 0.15 to 0.35 % Composition Note Fe is listed as a Base element for this material, but its % value is not listed in the specification. The value shown is a calculated one. Mechanical Properties Ultimate Tensile Strength 860 MPa (minimum) Elongation 18 % strain (minimum) Brinell Hardness 255 to 302 Other Information Material Class Ferrous Alloy Alloy Family Alloy Steel Alloy Group Nickel chromium molybdenum steel Alloy Sub-Group 4337/ E4337 Country USA Standards Body ASTM (USA) Description Vacuum-treated alloy steel forgings intended for use as turbine rotor disks and wheels. Designation Class 14 Specification Type Standard Specification ASTM A471 Specification Year 2002 Specification Status Active Specification Status Notes active 2002 Source Worldwide Guide to Equivalent Irons and Steels, 5th ed. ASM International 2006 Available forms Wrought Similar Alloys Click here to find similar alloys Links Organizations American Society for Testing and Materials (ASTM)
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Chemical Composition