Copper Alloy No. C46400

Naval Brass , CDA 464

ASTM B21 , ASTM B171

Chemical Composition % by weight

Element	Nominal	Minimum	Maximum
Copper	60	59	62
Lead	-	-	.20
Iron	-	-	.10
Tin	.8	.5	1
Zinc	39.2	Remainder
Arsenic**	-	.02	.06
Sb or P**	-	.02	.10

* The uninhibited alloy is is copper alloy no. C46400. 

** Arsenic, Antimony and Phosphorus inhibited alloys are identified respectively by copper alloy nos. C46500, C46600 and C46700.

Applications

Hardware: Aircraft turnbuckle barrels, balls, bolts.

Industrial: Condenser plates, welding rod.

Common Fabrication Processes

Blanking, drawing, forming and bending, heading and upsetting, hot forging and pressing, hot heading and upsetting, shearing.

Hardness*	Rockwell B Scales	82
Tensile Strength**	KSI	75
Yield Strength** (.5% EAU)	KSI	53
Elongation**	% in 2 inch	20

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

Physical Properties

Thermal Conductivity	BTU/ (sq ft-ft-hr-F)	67
Specific Heat	BTU/lb/ºF @ 68F	.09
Thermal Expansion	Per °F from 68 F to 572 F	.0000118
Density	lb/cu in @ 68 F	.304
Electrical Conductivity* (Annealed)	% IACS @ 68 F	26
Modulus of Elasticity (Tension)	KSI	15,000

*Volume basis

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