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Chemical Composition
Elements
Cu(1,2) P Ni Mg Si
(1) Cu + Sum of Named Elements 99.8% min.
(2) Cu value includes Ag.
Min (%) 0.02 0.50 0.02 0.10
Max (%) Rem 0.20 2.4 0.15 0.40
Mechanical Properties

No mechanical properties for this alloy

Physical Properties
Densitylb/cu in. at 68°F 0.322
Specific Gravity 8.91
Thermal ConductivityBtu/ sq ft/ ft hr/ °F at 68°F 148.8
Coefficient of Thermal Expansion 68-57210 to -6 power per °F (68 – 572°F) 9.3
Modulus of Elasticity in Tensionksi 18500
Fabrication Properties

No fabrication properties for this alloy

Common Fabrication Processes

No fabrication process properties for this alloy

Thermal Properties

No thermal properties for this alloy

Typical uses
Product Category Product Reason Category Reason
Electrical Connectors Conductivity (Electrical) Electrical Conductivity
Connectors Conductivity (Thermal) Thermal Conductivity
Connectors Forming Characteristics Formability
Connectors Mechanical Properties Fatigue Strength, High
Connectors Mechanical Properties Strength, High
Connectors Mechanical Properties Thermal Softening Resistance
IC-Lead frame semi-conductor material Conductivity (Electrical) Electrical Conductivity
IC-Lead frame semi-conductor material Conductivity (Thermal) Thermal Conductivity
IC-Lead frame semi-conductor material Mechanical Properties Fatigue Strength, High
IC-Lead frame semi-conductor material Mechanical Properties Strength, High
IC-Lead frame semi-conductor material Mechanical Properties Thermal Softening Resistance
Applicable Specifications
Form Specific Sub-Form Application System Standard Description
Sheet & Strip ASTM B422/B422M COPPER-ALUMINUM-SILICON-COBALT ALLOY AND COPPER-NICKEL-ALUMINUM-SILICON ALLOY SHEET AND STRIP
Strip ASTM B888/B88M COPPER ALLOY STRIP FOR USE IN MANUFACTURE OF ELECTRICAL CONNECTORS OR SPRING CONTACTS
Corrosion Properties

No Corrosion Properties Available.