Brass Copper Castings India
Copper Alloy No. C92500


Copper Alloy No. C92500
Leaded Tin Bronze SAE 640 , CDA 925 ASTM B 505
Chemical Composition % by weight
Element Nominal Minimum Maximum
Aluminum - - .005
Antimony - - .25
Copper 87 85 88
Iron - - .30
Lead 1 1 1.5
Nickel 1 .8 1.5
Phosphorus - - .30
Silicon - - .005
Sulfur - - .05
Tin 11 10 12
Zinc - - .50

Applications

Gears, automotive synchronizer rings.

Mechanical Properties

M07 - As Continuous Cast

Hardness* Brinell Hardness (500 kg load) 80
Tensile Strength** KSI 38 min
Yield Strength ** KSI (0.5% Ext. under load) 24 min
Elongation** % in 2 inch 10 min

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

Physical Properties

Thermal Conductivity BTU/ (sq ft-ft-hr-F) N/A
Specific Heat BTU/lb/ºF @ 68F .09
Thermal Expansion Per °F from 68 F to 350 F N/A
Density lb/cu in @ 68 F .317
Electrical Conductivity* (Annealed) % IACS @ 68 F 12
Modulus of Elasticity KSI 16,000

*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) 30
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