Chemical Composition Base Element Fe (Iron) Al (Aluminum) 0.02 % (minimum) B (Boron) 0.005 % (maximum) C (Carbon) 0.2 % (maximum) Cr (Chromium) 2 % (maximum) Cu (Copper) 1.5 % (maximum) Fe (Iron) 90.2 to 99.9 % (estimate) Mn (Manganese) 1.7 % (maximum) Mo (Molybdenum) 1 % (maximum) N (Nitrogen) 0.02 % (maximum) Nb (Niobium) 0.06 % (maximum) Ni (Nickel) 2 % (maximum) P (Phosphorus) 0.03 % (maximum) S (Sulfur) 0.03 % (maximum) Si (Silicon) 0.1 to 0.8 % Ti (Titanium) 0.2 % (maximum) V (Vanadium) 0.1 % (maximum) Zr (Zirconium) 0.15 % (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 530 MPa (minimum) Ultimate Tensile Strength 650 to 830 MPa Elongation 16 % strain (minimum) Other Information Material Class Ferrous Alloy Alloy Family Alloy Steel Alloy Group Nickel chromium molybdenum steel Alloy Sub-Group 4320/4320H Country Japan Standards Body JSA (Japan) Description High YS steel products in the QT condition; 50 mm<t<=70 mm Designation E550 E Specification Type Standard Specification JIS G3128 Specification Year 1999 Specification Status Active Specification Status Notes active 1999 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 Japanese Industrial Standards Committee (JISC)
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Chemical Composition

Base Element

Fe (Iron)