Copper Alloy No. C63000

Nickel Aluminum Bronze

ASTM B 150 CDA 630 , ASTM B171

Chemical Composition % by weight

Element	Nominal	Minimum	Maximum
Copper	82	Rem.	Rem.
Iron	3	2	4
Tin	-	-	.20
Zinc	-	-	.30
Aluminum	10	9	11
Manganese	-	-	1.5
Silicon	-	-	.25
Nickel (incl. Co)	5	4	5.5

Applications

Nuts, bolts, valve seats, plunger tips, marine shafts, valve guides, aircraft parts, pump shafts, structural members.

Common Fabrication Processes

Hot forming, forging, machining.

Hardness*	Rockwell B Scales	98
Tensile Strength**	KSI	118
Yield Strength** (.5% EAU)	KSI	75
Elongation**	% in 2 inch	15

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

Physical Properties

Thermal Conductivity	BTU/ (sq ft-ft-hr-F)	22.6
Specific Heat	BTU/lb/ºF @ 68F	.09
Thermal Expansion	Per °F from 68 F to 572 F	.0000090
Density	lb/cu in @ 68 F	.274
Electrical Conductivity* (Annealed)	% IACS @ 68 F	7
Modulus of Elasticity (Tension)	KSI	17,500

*Volume basis

Capacity for being cold worked	Poor
Capacity for being hot formed	Good
Machinability Rating (Free Cutting Brass=100)	30
Suitability for being joined by:	Soldering/Not Recommended
	Brazing/Fair
	Oxyacetylene Welding/Not Recommended
	Gas Shielded Arc Welding/Good
	Coated Metal Arc Welding/Good
Resistance Welding	Spot/Good
	Seam/Good
	Butt/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.