Copper Alloy C95600 CDA 956 Silicone Bronze Casting Alloy

Copper Alloy No. C95600

Aluminum Bronze CDA 956

Chemical Composition % by weight

Element	Nominal	Minimum	Maximum
Copper	90.3	88	Rem.
Lead	-	-	-
Iron	-	-	-
Nickel (incl Co)	-	-	.25
Aluminum	7	6	8
Manganese	-	-	-
Magnesium	-	-	-
Silicon	2.5	1.8	3.2
Zinc	-	-	-
Tin	-	-	-

Applications

Cable connectors, pole line hardware, terminals, gears, worm gears, marine hardware, valve stems.

Mechanical Properties (as cast)

M07 - As Continuous Cast

Hardness*	Brinell Hardness (3000 kg load)	140
Tensile Strength**	KSI	75
Yield Strength **	KSI (0.5% Ext. under load)	34
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)	22.3
Specific Heat	BTU/lb/ºF @ 68F	.09
Thermal Expansion	Per °F from 68 F to 572 F	.000009
Density	lb/cu in @ 68 F	.278
Electrical Conductivity	% IACS @ 68 F	8
Modulus of Elasticity	KSI	15,000

*Volume basis

Fabrication Practices

Stress relieving temperature	600 F or 315 C
Time at temperature	1 hour per inch of section thickness
Responds to heat treatment	Yes
Solution heat treating temperature	1600-1675 F or 870-910 C
Time at temperature	1 hour per inch of section thickness
Quenching medium	Water
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)	60
Suitability for being joined by:	Soldering/Good
	Brazing/Good
	Oxyacetylene Welding/Not Recommended
	Gas Shielded Arc Welding/Good
	Coated Metal Arc Welding/Fair

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