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C94700 Tin Bronze Heat Treated :

Copper Alloy No. C94700 HT

Heat Treated Nickel Tin Bronze CDA 947 , Nicomet® Bronze

Chemical Composition % by weight

Element	Nominal	Minimum	Maximum
Aluminum	-	-	.005
Antimony	-	-	.15
Copper	88	85	90
Iron	-	-	.25
Lead	-	-	.01
Manganese	-	-	.20
Nickel	5	4.5	6
Phosphorus	-	-	.05
Silicon	-	-	.005
Sulfur	-	-	.05
Tin	5	4.5	6
Zinc	2	1	2.5

Applications

Valve stems and bodies, bearings, wear guides, shift forks, feeding mechanisms, circuit breaker parts, gears, piston cylinders, nozzles.

Mechanical Properties

M07/TF00 As Continuous Cast, Solution and Precipitation Heat Treated

Hardness*	Brinell Hardness (3000 kg load)	180
Tensile Strength**	KSI	75 min
Yield Strength **	KSI (0.5% Ext. under load)	50 min
Elongation**	% in 2 inch	5 min

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

Physical Properties

Thermal Conductivity	BTU/ (sq ft-ft-hr-F)	31.2
Specific Heat	BTU/lb/ºF @ 68F	.09
Thermal Expansion	Per °F from 68 F to 392 F	.000011
Density	lb/cu in @ 68 F	.320
Electrical Conductivity* (Annealed)	% IACS @ 68 F	15
Modulus of Elasticity	KSI	15,000

*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 Yes

Solution heat treating temperature 1425-1475 F or 775-800 C

Time at temperature 2 hours per inch of section thickness

Quenching medium Water

Precipitation hardening temperature 580-620 F or 305-325 C

Time at temperature 5 hours

Quenching medium Air

Machinability rating (Free Cutting Brass=100) 30

Suitability for being joined by: Soldering/Excellent

Brazing/Excellent*

Oxyacetylene Welding/Fair

Carbon Arc Welding/Not Recommended

Gas Shielded Arc Welding/Good

Coated Metal Arc Welding/Good

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