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

Applications

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

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/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

*Volume basis

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

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.