C92900 Leaded Tin Bronze CDA 929

Copper Alloy No. C92900

Leaded Nickel Tin Bronze CDA 929

ASTM B 505

Chemical Composition % by weight

Element	Nominal	Minimum	Maximum
Aluminum	-	-	.005
Antimony	-	-	.25
Copper	84	82	86
Iron	-	-	.20
Lead	2.6	2	3.2
Nickel	3.4	2.8	4
Phosphorus	-	-	.50
Silicon	-	-	.005
Sulfur	-	-	.05
Tin	10	9	11
Zinc	-	-	.25

Applications

Gear, wear plates and guides, cams.  

Mechanical Properties

M07 - As Continuous Cast

Hardness	Brinell Hardness (500 kg load)	80
Tensile Strength	KSI	45 min
Yield Strength	KSI (0.5% Ext. under load)	25 min
Elongation	% in 2 inch	8 min

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

Physical Properties

Thermal Conductivity	BTU/ (sq ft-ft-hr-F)	33.6
Specific Heat	BTU/lb/ºF @ 68F	.09
Thermal Expansion	Per °F from 68 F to 392 F	.0000095
Density	lb/cu in @ 68 F	.320
Electrical Conductivity* (Annealed)	% IACS @ 68 F	9.2
Modulus of Elasticity	KSI	14,000

*Volume basis

Fabrication Practices

Stress relieving temperature	500 F or 260 C
Time at temperature	1 hour per inch of section thickness
Responds to heat treatment	No
Machinability rating (Free Cutting Brass=100)	40
Suitability for being joined by:	Soldering/Excellent
	Brazing/Good*
	Oxyacetylene Welding/Not Recommended
	Gas Shielded Arc Welding/Not Recommended
	Coated Metal Arc Welding/Not Recommended

*Since brazing is performed at temperatures within the hot-short range, strain must be avoided during the brazing and cooling of this alloy.

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