C90200 Tin Bronze
Copper Alloy No. C90200
Tin Bronze CDA 902
Chemical Composition % by weight
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 |