CDA 955 Bronze Alloy

Element % Nominal Minimum Maximum
Aluminum 11 10 11.5
Copper 81 78
Iron 4 3 5
Manganese 3.5
Nickel 4 3 5.5
Hardness BHN (3000 kg load) 190
Tensile Strength ksi 95
Yield Strength ksi (.5% ext. under load) 42
Elongation % in 2 inch 10

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.

Applications :
Valve guides and seats in aircraft engines, corrosion resistant parts, bearings, bushings, gears, worm gears, pickling hooks and baskets, agitators.

Physical Properties :

Thermal Conductivity BTU/ (sq ft-ft-hr-F) 24.2
Specific Heat BTU/lb/ºF @ 68F .10
Thermal Expansion Per °F from 68 F to 572 F .000009
Density lb/cu in @ 68 F .272
Electrical Conductivity* (Annealed) % IACS @ 68 F 8.5
Modulus of Elasticity KSI 16,000

Fabrication Practices :

Stress relieving temperature 600 F or 316 C
Time at temperature 1 hour per inch of section thickness
Responds to heat treatment Yes
Solution heat treating temperature 1585-1635 F or 860-890 C
Time at temperature 1 hour per inch of section thickness
Quenching medium Water or oil quench
Annealing temperature 1150-1225 F or 620-660 C
Time at temperature 1 hour per inch of section thickness
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