Chemical Composition Base Element Fe (Iron) C (Carbon) 0.35 to 0.5 % Cr (Chromium) 0.8 to 1.15 % Fe (Iron) 96.7 to 97.8 % (estimate) Mn (Manganese) 0.75 to 1.05 % Mo (Molybdenum) 0.15 to 0.25 % P (Phosphorus) 0.025 % (maximum) S (Sulfur) 0.025 % (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 4.5e8 Pa (minimum) Ultimate Tensile Strength 7.25e8 to 8.95e8 Pa Elongation 19 % strain (minimum) Brinell Hardness 217 (minimum) 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 Thin-walled forgings (including glass bottles) for pressure vessel use. Alternate Name formerly Type V Grade 5 Class 65 Designation Grade J Class 65 Specification Type Standard Specification ASTM A372/A372M 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