Copper Alloy No. C95500

Aluminum Bronze 9D, CDA 955 Nickel Aluminum Bronze , Grade D

ASTM B 505 , ASTM B 271

Chemical Composition % by weight


Element Nominal Minimum Maximum
Aluminum 11 10 11.5
Copper 81 78 -
Iron 4 3 5
Manganese - - 3.5
Nickel 4 3 5.5



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


Mechanical Properties (as cast)


M07 - As Continuous Cast

Hardness* Brinell Hardness (3000 kg load) 190
Tensile Strength** KSI 95 min
Yield Strength ** KSI (0.5% Ext. under load) 42 min
Elongation** % in 2 inch 10

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

Physical Properties

Thermal Conductivity BTU/ (sq ft-ft-hr-F) 24.2
Specific Heat BTU/lb/F @ 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

*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 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
  Oxyacetylene Welding/Not Recommended
  Carbon Arc Welding/Poor
  Gas Shielded Arc Welding/Good
  Coated Metal Arc Welding/Good

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.