Find suppliers for this alloyC64740
Chemical Composition
(1) Cu value includes Ag. (2) Cu + Sum of Named Elements 99.5% min. (3) Ni value includes Co.
Min (%)
Max (%)
Mechanical Properties*
Temper Code
Tensile Strength
YS-0.2% Offset
Vickers Hardness, 500 gm
Flat Products1/2 HardH0278   Typ
75   Typ
7   Min
165   Typ
Extra HardH0693   Typ
89   Typ
5   Min
195   Typ
HardH0485   Typ
84   Typ
5   Min
180   Typ
SpringH08100   Typ
96   Typ
5   Min
210   Typ
* Measured at room temperature, 68°F (20°C).
Physical Properties
Melting Point - Liquidus°F1967
Melting Point - Solidus°F1850
Densitylb/cu in. at 68°F0.32
Specific Gravity8.9
Electrical Conductivity% IACS at 68°F30
Thermal ConductivityBtu/ sq ft/ ft hr/ °F at 68°F70
Coefficient of Thermal Expansion 68-57210⁻⁶ per °F (68 – 572°F)9.4
Specific Heat CapacityBtu/ lb /°F at 68°F0.09
Modulus of Elasticity in Tensionksi17800
Fabrication Properties
Technique Suitability
Oxyacetylene WeldingGood
Gas Shielded Arc WeldingExcellent
Coated Metal Arc WeldingNot Recommended
Spot WeldNot Recommended
Seam WeldNot Recommended
Butt WeldGood
Capacity for Being Cold WorkedExcellent
Capacity for Being Hot FormedExcellent
Forgeability Rating65
Machinability Rating20
Fabrication Process Properties

No fabrication process properties for this alloy

Thermal Properties
Treatment Minimum* Maximum*
* Temperature is measured in Fahrenheit.
Hot Treatment12001800
Typical uses
Product Category Product Reason Category Reason
ElectricalCircuit Breaker ComponentsConductivity (Thermal)Thermal Conductivity
Circuit Breaker ComponentsCorrosion ResistanceResistance to Corrosion - General and Pitting in Water Radiators
Circuit Breaker ComponentsSolderabilitySolderability
ConductorsConductivity (Thermal)Thermal Conductivity
ConductorsCorrosion ResistanceCorrosion Resistance
ConductorsMechanical PropertiesDuctility
Conductors, Electrical and Thermal, High StrengthConductivity (Electrical)Electrical Conductivity
Conductors, Electrical and Thermal, High StrengthConductivity (Thermal)Thermal Conductivity
Conductors, Electrical and Thermal, High StrengthCorrosion ResistanceCorrosion Resistance
Conductors, Electrical and Thermal, High StrengthCorrosion ResistanceStress corrosion resistance, high
Conductors, Electrical and Thermal, High StrengthForming CharacteristicsFormability
Conductors, Electrical and Thermal, High StrengthMechanical PropertiesHigh Strength
Conductors, Electrical and Thermal, High StrengthPlating CharacteristicsPlatability
Contacts, switchConductivity (Electrical)Electrical Conductivity
Contacts, switchConductivity (Thermal)Thermal Conductivity
Contacts, switchMechanical PropertiesFatigue Strength, High
Contacts, switchMechanical PropertiesStrength, High
Contacts, switchMechanical PropertiesThermal Softening Resistance
Lead FramesConductivity (Electrical)Electrical Conductivity
Applicable Specifications

No applicable specifications for this alloy

Corrosion Properties

No information available.