Chemical Composition Base Element Fe (Iron) C (Carbon) 0.23 % (maximum) Cr (Chromium) 1.5 to 2 % Fe (Iron) 92.4 to 95.2 % (estimate) Mn (Manganese) 0.2 to 0.4 % Mo (Molybdenum) 0.4 to 0.6 % Ni (Nickel) 2.75 to 3.9 % P (Phosphorus) 0.02 % (maximum) S (Sulfur) 0.02 % (maximum) Si (Silicon) 0.4 % (maximum) V (Vanadium) 0.03 % (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 490 MPa (minimum) Ultimate Tensile Strength 620 to 795 MPa Elongation 18 % 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 Miscellaneous high-alloy steel Country India Standards Body BIS (India) Description Alloy steel forgings for pressure vessels such as those used in reactor systems; QT Designation Grade III 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

Base Element

Fe (Iron)