Product Description High Performance Copper Alloy C70250StandardDINENASTMJISMaterial codeNo.Material codeNo.UNS No.JIS No.CuNi3SiMgCuNi3SiMgC70250ApplicationsComponents for electrical industry connectors Relay springs Springs Semiconductor componentsChemical Composition (%)NiSiMgCu2.1-4.20.25-1.20.05-0.30>96.2Physical PropertiesElectrical conductivity IACS%(20℃)40Thermal conductivity W/(m*K)190Modulus of elasticity (KN/mm2)130MeritGood corrosion resistance in nature atmosphere and industrial atmosphere. It is good at stress corrosion cracking.Mechanical PropertiesTemper ClassTemperTensile StrengthYield StrengthElongation A50Vickers HardnessBending Test90 degree (R/T)(Rm,Mpa)(Rp0.2,Mpa)(%) (HV)GWBWR620TM00620-760500max10min180-21000R650TM01650-780585min7min190-25011R690TM02690-860655min5min220-2601.51.5R760TM04760-840720min7min210-25022Product DisplayPackaging & Shipping