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Copper Alloy No. C95800

Alpha Nickel Aluminum Bronze CDA 958

ASTM B 505 , ASTM B 271

Chemical Composition % by weight

Element Nominal Minimum Maximum
Aluminum 9 8.5 9.5
Copper 81 79 -
Iron 4 3.5 4.5
Manganese 1 .8 1.5
Nickel 5 4 5
Silicon - - .10

Applications

Propeller hubs, blades and other parts in contact with salt water.

Mechanical Properties (as cast)

M07 - As Continuous Cast

Hardness* Brinell Hardness (3000 kg load) 159
Tensile Strength** KSI 90
Yield Strength ** KSI (0.5% Ext. under load) 38
Elongation** % in 2 inch 18

**Test values are nominal approximations and depend on specimen size and orientation.

Physical Properties

Thermal Conductivity BTU/ (sq ft-ft-hr-F) 20.8
Specific Heat BTU/lb/F @ 68F .105
Thermal Expansion Per F from 68 F to 572 F .000009
Density lb/cu in @ 68 F .276
Electrical Conductivity* (Annealed) % IACS @ 68 F 7.1
Modulus of Elasticity KSI 16,500

*Volume basis

Fabrication Practices

Stress relieving temperature 600 F or 316 C
Time at temperature 1 hour per inch of section thickness
Responds to heat treatment *
Machinability rating (Free Cutting Brass=100) 50
Suitability for being joined by: Soldering/Good
Brazing/Fair
Oxyacetylene Welding/Not Recommended
Carbon Arc Welding/Poor
Gas Shielded Arc Welding/Good
Coated Metal Arc Welding/Good

*Castings exposed to seawater or other aggressive environments should be temper annealed.

The values listed above represent reasonable approximations suitable for general engineering use. Due to commercial variations in composition and to manufacturing limitations, they should not be used for specification purposes. See applicable A.S.T.M. specification references.