Chemical Composition Base Element Fe (Iron) C (Carbon) 0.45 % (maximum) Cr (Chromium) 0.7 to 1.25 % Fe (Iron) 96.9 to 98.4 % (estimate) Mn (Manganese) 0.6 to 1 % Mo (Molybdenum) 0.15 % (minimum) P (Phosphorus) 0.025 % (maximum) S (Sulfur) 0.02 % (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 1.15e7 lbf/ft^2 (minimum) Ultimate Tensile Strength 1.59e7 lbf/ft^2 (minimum) Elongation 18 % strain (minimum) Other Information Material Class Ferrous Alloy Alloy Family Alloy Steel Alloy Group Chromium molybdenum steel Alloy Sub-Group 4145/ 4147 Country USA Standards Body ASTM (USA) Description Carbon steel forgings for magnetic retaining rings for turbine generators; QT Designation Class 3 Specification Type Standard Specification ASTM A288-91 Specification Year 2003 Specification Status Active Specification Status Notes active 2003 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