Copper Alloy No. CDA 958



Composition - Percent

  Nominal Minimum Maximum
Aluminum 9 8.5 9.5
Copper 81 79.0 ...
Iron 4 3.5 4.5
Lead ... ... .03
Manganese 1 .8 1.5
Nickel 5 4.0 5.0
Silicon ... ... .10

Physical Properties

Melting Point
(Liquidus)
1940°F
Melting Point
(Solidus)
1910°F
Density .276 lb./cu. in. @ 68°F
Specific Gravity 7.64
Coefficient of
Thermal Expansion
.000009 per °F from 68°F to 572°F
Thermal Conductivity 20.8 BTU/sq. ft./ft./hr/°F @68°F
Electrical Conductivity 7.1 %IACS @ 68°F
Specific Heat .105 BTU/lb./°F @ 68°F
Modulus of Elasticity
(Tension)
16,500 ksi

Mechanical Properties

Min. Typ.
Tensile Strength - ksi (kg/mm²) 85.0 95
Yield Strength - ksi (kg/mm²)
(.5% Extension Under Load)
35.0 38
Yield Strength - ksi (kg/mm²)
(.2% Offset)
... ...
Elongation in 2 inches (50mm)
Percent
15 25