Chemical Composition Base Element Fe (Iron) C (Carbon) 0.52 to 0.6 % Cr (Chromium) 0.65 to 0.95 % Cu (Copper) 0.25 % (maximum) Fe (Iron) 96.5 to 98 % (estimate) Mn (Manganese) 0.65 to 0.95 % Ni (Nickel) 0.35 % (maximum) P (Phosphorus) 0.03 % (maximum) S (Sulfur) 0.03 % (maximum) Si (Silicon) 0.17 to 0.37 % 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 2.26e7 lbf/ft^2 (minimum) Ultimate Tensile Strength 2.56e7 lbf/ft^2 (minimum) Elongation 9 % strain (minimum) Other Information Material Class Ferrous Alloy Alloy Family Alloy Steel Alloy Group Chromium steel Alloy Sub-Group 5150/ 5155 Country China Standards Body SAC (China) Description Bar, flat; HR/CD; QT Designation 55CrMnA Specification Type Standard Specification GB 1222 Specification Year 1984 Specification Status Active Specification Status Notes Active in 2005 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 China State Bureau of Quality and Technical Supervision (CSBTS) (GB/JB/YB)
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Chemical Composition