Chemical Composition Base Element Fe (Iron) C (Carbon) 0.3 to 0.48 % Cr (Chromium) 0.8 to 1.2 % Fe (Iron) 96.5 to 98 % (estimate) Mn (Manganese) 0.65 to 1 % Mo (Molybdenum) 0.15 to 0.25 % P (Phosphorus) 0.025 % (maximum) S (Sulfur) 0.025 % (maximum) Si (Silicon) 0.15 to 0.4 % V (Vanadium) 0.1 % (maximum) 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 690 MPa (minimum) Ultimate Tensile Strength 900 MPa (minimum) Elongation 14 % strain (minimum) Brinell Hardness 262 to 302 Other Information Material Class Ferrous Alloy Alloy Family Alloy Steel Alloy Group Chromium molybdenum steel Alloy Sub-Group 4140/ 4142 Country USA Standards Body ASTM (USA) Description Continuous grain flow forged carbon steel crankshafts for medium speed diesel and natural gas engines; vacuum degassed Designation Grade 5 Specification Type Standard Specification ASTM A983/A983M 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