Find suppliers for this alloyC70260
Chemical Composition
Element
Cu(1,2)PNi(3)Si
(1) Cu value includes Ag. (2) Cu + Sum of Named Elements 99.5% min. (3) Ni value includes Co.
Min (%)1.00.20
Max (%)Rem0.013.00.7
Mechanical Properties*
Form
Temper
Temper Code
Tensile Strength
(ksi)
YS-0.2% Offset
Elongation
(%)
Fatigue Strength**
(ksi)
Section Size
(in)
Flat ProductsHardH0470   Typ
68   Typ
4   Typ
0.02
SpringH0897   Typ
90   Typ
6   Typ
35   Typ
0.02
* Measured at room temperature, 68°F (20°C). ** Fatigue Strength: 100 x 106 cycles, unless indicated as [N] x 106.
Physical Properties
Melting Point - Liquidus°F1940
Melting Point - Solidus°F1905
Densitylb/cu in. at 68°F0.32
Specific Gravity8.86
Electrical Conductivity% IACS at 68°F40
Thermal ConductivityBtu/ sq ft/ ft hr/ °F at 68°F90
Coefficient of Thermal Expansion 68-39210⁻⁶ per °F (68 – 392°F)9
Coefficient of Thermal Expansion 68-57210⁻⁶ per °F (68 – 572°F)10
Specific Heat CapacityBtu/ lb /°F at 68°F0.09
Modulus of Elasticity in Tensionksi19000
Modulus of Rigidityksi7200
Fabrication Properties
Technique Suitability
SolderingGood
BrazingGood
Oxyacetylene WeldingGood
Gas Shielded Arc WeldingGood
Coated Metal Arc WeldingFair
Spot WeldGood
Seam WeldGood
Butt WeldGood
Capacity for Being Cold WorkedGood
Capacity for Being Hot FormedExcellent
Forgeability Rating40
Machinability Rating30
Common Fabrication Processes
  • Bending
  • Forming
  • Stamping
Thermal Characteristics

No thermal characteristics for this alloy

Typical uses
Product Category Product Reason Category Reason
ElectricalSpringsConductivity (Electrical)Electrical Conductivity
SpringsMechanical PropertiesStrength
TerminalsConductivity (Electrical)Electrical Conductivity
TerminalsMechanical PropertiesStiffness
TerminalsMechanical PropertiesStrength
IndustrialContact SpringsConductivity (Electrical)Electrical Conductivity
Contact SpringsMechanical PropertiesStiffness
Contact SpringsMechanical PropertiesStrength
Applicable Specifications
Form Specific Sub-Form System Standard Description
Sheet & StripASTMB422/B422MCOPPER-ALUMINUM-SILICON-COBALT ALLOY AND COPPER-NICKEL-ALUMINUM-SILICON ALLOY SHEET AND STRIP
StripElectric Connector & Spring ContactASTMB888/B88MCOPPER ALLOY STRIP FOR USE IN MANUFACTURE OF ELECTRICAL CONNECTORS OR SPRING CONTACTS
Corrosion Properties

No information available.