Chemical Composition Base Element Fe (Iron) C (Carbon) 0.2 to 0.25 % Cr (Chromium) 0.45 to 0.65 % Cu (Copper) 0.2 to 0.4 % Fe (Iron) 96.7 to 97.9 % (estimate) Mn (Manganese) 0.9 to 1.2 % Ni (Nickel) 0.2 to 0.4 % P (Phosphorus) 0.04 % (maximum) S (Sulfur) 0.04 % (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 Yield Strength 940 MPa (minimum) Ultimate Tensile Strength 1040 MPa (minimum) Elongation 9 % strain (minimum) Rockwell Hardness C scale 33 to 39 Other Information Material Class Ferrous Alloy Alloy Family Alloy Steel Alloy Group Nickel chromium steel Alloy Sub-Group Low-carbon nickel chromium steel Country USA Standards Body ASTM (USA) Description Atmospheric corrosion resistant fasteners in thread diameters M16-M36 for general engineering; QT Designation Class 10.9.3 Type F Specification Type Standard Specification ASTM F568M Specification Year 2004 Specification Status Active Specification Status Notes active 2004 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