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C70310 Wrought COPPER NICKELS Copper-Nickel Alloys true true https://api.copper.org/alloys.xhtml/C70310
Chemical Composition
Elements
Cu(1,2) Pb Sn Zn Fe P Ni(3) Ag Mg Si Zr
(1) Cu value includes Ag.
(2) Cu + Sum of Named Elements 99.5% min.
(3) Ni value includes Co.
Min (%) 1.0 0.02 0.08 0.005
Max (%) Rem 0.05 1.0 2.0 0.10 0.05 4.0 0.50 0.10 1.0 0.05
Mechanical Properties *
Form Temper Temper Code Tensile Strength
(ksi)		 YS-0.2% Offset
(ksi)		 Elongation
(%)
* Measured at room temperature, 68°F (20°C).
Strip Mill-hardened Temper, TM - 1/2 Hard TM02 95 Min for Standard
 85 Min for Standard
 10 Typ
Mill-hardened Temper, TM - Hard TM04 100 Min for Standard
 95 Min for Standard
 6 Typ
Mill-hardened Temper, TM - XHMS Spring TM08 110 Min for Standard
 105 Min for Standard
 4 Typ
Physical Properties
Melting Point - Liquidus°F 1994
Melting Point - Solidus°F 1957
Densitylb/cu in. at 68°F 0.319
Specific Gravity 8.85
Electrical Conductivity% IACS at 68°F 38
Coefficient of Thermal Expansion 68-21210 to -6 power per °F (68 – 212°F) 9.4
Modulus of Elasticity in Tensionksi 18600
Fabrication Properties
Technique Suitability
Soldering Good
Brazing Good
Oxyacetylene Welding Good
Gas Shielded Arc Welding Good
Coated Metal Arc Welding Good
Spot Weld Good
Seam Weld Good
Butt Weld Good
Capacity for Being Cold Worked Excellent
Capacity for Being Hot Formed Excellent
Common Fabrication Processes
  • Forming and Bending
  • Stamping
Thermal Properties

No thermal properties for this alloy

Typical uses
Product Category Product Reason Category Reason
Electrical Connectors
Contacts
Switches and Relays
Terminals
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.