Brass Copper Castings India
C90200 Tin Bronze


Copper Alloy No. C90200
Tin Bronze CDA 902
Chemical Composition % by weight
Element Nominal Minimum Maximum
Aluminum - - .005
Antimony - - .20
Copper 93 91 94
Iron - - .20
Lead - - .30
Nickel - - .50
Phosphorus - - .05
Silicon - - .005
Sulfur - - .05
Tin 7 6 8
Zinc - - .50

Applications

Bearings and Bushings

Mechanical Properties

M07 - As Continuous Cast

Hardness* Brinell Hardness (500 kg load) 70
Tensile Strength** KSI 38
Yield Strength ** KSI (0.5% Ext. under load) 16
Elongation** % in 2 inch 30

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

Physical Properties

Thermal Conductivity BTU/ (sq ft-ft-hr-F) 36
Specific Heat BTU/lb/ºF @ 68F .09
Thermal Expansion Per °F from 68 F to 572 F .0000101
Density lb/cu in @ 68 F .318
Electrical Conductivity* (Annealed) % IACS @ 68 F 13
Modulus of Elasticity KSI 16,000

*Volume basis

Fabrication Practices

Stress relieving temperature 500 F
Time at temperature 1 hour per inch of section thickness
Responds to heat treatment No
Machinability rating (Free Cutting Brass=100) 20
Suitability for being joined by: Soldering/Excellent
Brazing/Good*
Oxyacetylene Welding/Fair
Gas Shielded Arc Welding/Fair
Coated Metal Arc Welding/Fair