Chemical Composition Base Element Fe (Iron) C (Carbon) 0.2 to 0.26 % Fe (Iron) 96.3 to 97.7 % (estimate) Mn (Manganese) 0.35 to 0.75 % Mo (Molybdenum) 0.2 to 0.3 % Ni (Nickel) 1.5 to 2 % P (Phosphorus) 0.035 % (maximum) S (Sulfur) 0.04 % (maximum) Si (Silicon) 0.1 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 Ultimate Tensile Strength 930 MPa Elongation 10 % strain Other Information Material Class Ferrous Alloy Alloy Family Alloy Steel Alloy Group Nickel molybdenum steel Alloy Sub-Group 4620/ 4621 Country United Kingdom Standards Body BSI (United Kingdom) Description Bloom billet slab bar rod, forging case hardened Designation 665M23 Specification Type Standard Specification BS 970/1 Specification Year 1983 Specification Status Obsolete Specification Status Notes Withdrawn Source Worldwide Guide to Equivalent Irons and Steels, 5th ed.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 British Standards Institution (BSI)
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Chemical Composition