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
Propeller hubs, blades and other parts in contact with salt water.
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.
Thermal Conductivity BTU/ (sq ft-ft-hr-F) 20.8 Specific Heat BTU/lb/ºF @ 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
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.