C95800 / CDA 958 Aluminum Bronze Alloys
CDA 958 ASTM B 505 , ASTM B 271
Chemical Composition % by weigh :
| 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/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 |
*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 |