Chemical Composition Base Element Fe (Iron) C (Carbon) 0.17 to 0.23 % Cr (Chromium) 0.8 to 1.2 % Fe (Iron) 95.4 to 97.1 % (estimate) Mn (Manganese) 0.7 to 1.1 % Mo (Molybdenum) 0.08 to 0.16 % Ni (Nickel) 1 to 1.4 % P (Phosphorus) 0.035 % (maximum) S (Sulfur) 0.05 % (maximum) Si (Silicon) 0.15 to 0.4 % 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. Other Information Material Class Ferrous Alloy Alloy Family Alloy Steel Alloy Group Nickel chromium molybdenum steel Alloy Sub-Group 4320/4320H Country Finland Standards Body SFS (Finland) Description Case hardened Designation 20NiCrMo5 Specification Type Standard Specification SFS 509 Specification Year 1976 Specification Status Active Specification Status Notes withdrawn Source Worldwide Guide to Equivalent Irons and Steels, 5th ed.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 Finnish Standard Association (SFS)
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Chemical Composition