Chemical Composition Base Element Fe (Iron) C (Carbon) 0.75 to 0.85 % Cr (Chromium) 19 to 21 % Fe (Iron) 73.4 to 77 % (estimate) Mn (Manganese) 0.3 to 0.75 % Ni (Nickel) 1.2 to 1.7 % P (Phosphorus) 0.04 % (maximum) S (Sulfur) 0.03 % (maximum) Si (Silicon) 1.75 to 2.25 % 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 High-Alloy Steel (Corrosion and Heat Resistant, Stainless, and Nickel Steels) Alloy Group Miscellaneous or unclassified Alloy Sub-Group High-carbon high-alloy steel Country United Kingdom Standards Body BSI (United Kingdom) Description Valve Designation 443S65 Specification Type Standard Specification BS 970/4 Specification Year 1970 Specification Status Obsolete Specification Status Notes Superseded withdrawn Source Worldwide Guide to Equivalent Irons and Steels, 5th ed.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