Brass Copper Castings India
C94700 Tin Bronze (heat treated)


Copper Alloy No. C94700 HT
Heat Treated Nickel Tin Bronze CDA 947
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