Chemical Composition Base Element Fe (Iron) C (Carbon) 0.25 % (maximum) Cr (Chromium) 0.25 % Fe (Iron) 95.9 to 97.7 % (estimate) Mn (Manganese) 1.2 to 1.5 % Mo (Molybdenum) 0.45 to 0.6 % Ni (Nickel) 0.4 to 1 % P (Phosphorus) 0.03 % (maximum) S (Sulfur) 0.03 % (maximum) Si (Silicon) 0.4 % (maximum) V (Vanadium) 0.05 % (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 345 MPa (minimum) Ultimate Tensile Strength 550 to 725 MPa Elongation 16 % strain (minimum) Other Information Material Class Ferrous Alloy Alloy Family Alloy Steel Alloy Group Nickel chromium molybdenum steel Alloy Sub-Group Miscellaneous nickel chromium molybdenum steel Country India Standards Body BIS (India) Description Alloy steel forgings for pressure vessels such as those used in reactor systems; QT Designation Grade I A Specification Type Standard Specification IS 12145 Specification Year 2001 Specification Status Active Specification Status Notes active 2001 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 Bureau of Indian Standards (BIS)
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Chemical Composition