Chemical Composition Base Element Fe (Iron) C (Carbon) 0.1 % (minimum) Cr (Chromium) 4 to 6 % Fe (Iron) 91.3 to 95.5 % (estimate) Mn (Manganese) 1 % (maximum) Mo (Molybdenum) 0.4 to 0.65 % P (Phosphorus) 0.04 % (maximum) S (Sulfur) 0.03 % (maximum) Si (Silicon) 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 550 MPa (minimum) Ultimate Tensile Strength 690 MPa (minimum) Elongation 16 % strain (minimum) 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 Chromium molybdenum steel Country USA Standards Body ASTM (USA) Description Bolts for high-temp service up to M100 (4 in.) diameter Designation B5 Specification Type Standard Specification ASTM A193/A193M 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