Chemical Composition Base Element Fe (Iron) C (Carbon) 0.26 to 0.33 % Cr (Chromium) 17 to 19 % Fe (Iron) 65.3 to 71.6 % (estimate) Mn (Manganese) 3 to 4 % Ni (Nickel) 8 to 10 % P (Phosphorus) 0.18 to 0.33 % S (Sulfur) 0.035 % (maximum) Si (Silicon) 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 620 MPa Ultimate Tensile Strength 830 MPa Elongation 15 % strain Brinell Hardness 269 (minimum) Other Information Material Class Ferrous Alloy Alloy Family High-Alloy Steel (Corrosion and Heat Resistant, Stainless, and Nickel Steels) Alloy Group Miscellaneous or unclassified Alloy Sub-Group Miscellaneous high-alloy steel Country USA Standards Body DoD (USA) Description Forging, bar billet, wire, low magnetic; supersedes MIL-S-17759B Designation II (Cr-Ni-Mn-P) Specification Type Standard Specification DoD-F-24669/5 Specification Year 1986 Specification Status Obsolete Specification Status Notes Cancelled 2001 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 Department of Defense (MIL/DoD-F/FED QQ)
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Chemical Composition