Chemical Composition Base Element Fe (Iron) Al (Aluminum) 0.015 % (maximum) C (Carbon) 0.25 to 0.35 % Cr (Chromium) 1.05 to 1.5 % Fe (Iron) 94.5 to 97.5 % (estimate) Mn (Manganese) 1 % (maximum) Mo (Molybdenum) 1 to 1.5 % Ni (Nickel) 0.75 % (maximum) P (Phosphorus) 0.012 % (maximum) S (Sulfur) 0.015 % (maximum) Si (Silicon) 0.1 % (maximum) V (Vanadium) 0.2 to 0.3 % 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 Yield Strength 5.85e8 Pa (minimum) Ultimate Tensile Strength 7.25e8 to 8.6e8 Pa Elongation 17 % strain (minimum) Other Information Material Class Ferrous Alloy Alloy Family Alloy Steel Alloy Group Chromium molybdenum steel Alloy Sub-Group Chromium molybdenum vanadium steel Country USA Standards Body ASTM (USA) Description Vacuum-treated carbon and alloy steel forgings for turbine rotors and shafts; long. El and RA. Alternate Name Class 8 Designation Grade D, Class 8 Specification Type Standard Specification ASTM A470 Specification Year 2003 Specification Status Active Specification Status Notes active 2003 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

Base Element

Fe (Iron)