Chemical Composition Base Element Fe (Iron) C (Carbon) 0.47 to 0.55 % Cr (Chromium) 0.8 to 1.1 % Fe (Iron) 96.7 to 97.8 % (estimate) Mn (Manganese) 0.65 to 0.95 % P (Phosphorus) 0.035 % (maximum) S (Sulfur) 0.035 % (maximum) Si (Silicon) 0.15 to 0.35 % V (Vanadium) 0.15 to 0.25 % 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 1080 MPa (minimum) Ultimate Tensile Strength 1230 MPa (minimum) Elongation 10 % strain (minimum) Brinell Hardness 363 to 429 Other Information Material Class Ferrous Alloy Alloy Family Alloy Steel Alloy Group Chromium vanadium steel Alloy Sub-Group 6150/6150H Country South Korea Standards Body KS (South Korea) Description Cr-V steel, mainly use for coil spring, torsion bar spring. Designation SPS 6 Specification Type Standard Specification KS D 3701 Specification Year 2002 Specification Status Active Specification Status Notes Active 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 Deutsches Institut fur Normung e.V. (DIN) (German Standardization Institute)
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Chemical Composition