Chemical Composition Base Element Fe (Iron) C (Carbon) 0.25 to 0.35 % Cr (Chromium) 0.7 to 0.9 % Cu (Copper) 0.5 % (maximum) Fe (Iron) 94.3 to 96.6 % (estimate) Mn (Manganese) 0.4 to 0.7 % Mo (Molybdenum) 0.2 to 0.3 % Ni (Nickel) 1.65 to 2 % P (Phosphorus) 0.04 % (maximum) S (Sulfur) 0.045 % (maximum) Si (Silicon) 0.2 to 0.8 % W (Tungsten) 0.1 % (maximum) 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 793 MPa (minimum) Ultimate Tensile Strength 1030 MPa (minimum) Elongation 7 % strain (minimum) Other Information Material Class Ferrous Alloy Alloy Family Alloy Steel Alloy Group Nickel chromium molybdenum steel Alloy Sub-Group Cast nickel chromium molybdenum steel Country USA Standards Body ASTM (USA) Description Cr-Ni-Mo castings made by the investment casting process; QT Designation 9Q Specification Type Standard Specification ASTM A732/A732M 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 Casting Similar Alloys Click here to find similar alloys Links Organizations American Society for Testing and Materials (ASTM)
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Chemical Composition