Copper Alloy C95500 CDA 955 Bronze Alloy

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.

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/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

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

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