C94500 High Leaded Tin Bronze
Copper Alloy No. C94500
High Leaded Tin Bronze CDA 945
Chemical Composition % by weight
High Leaded Tin Bronze CDA 945
Chemical Composition % by weight
Element | Nominal | Minimum | Maximum |
Aluminum | - | - | .005 |
Antimony | - | - | .8 |
Copper | 74 | Remainder | |
Iron | - | - | .15 |
Lead | 20 | 16 | 22 |
Nickel | - | - | 1 |
Phosphorus | - | - | .05 |
Silicon | - | - | .005 |
Sulfur | - | - | .08 |
Tin | 7 | 6 | 8 |
Zinc | - | - | 1.2 |
Applications
Locomotive wearing parts, high load low speed bearings
M07 - As Continuous Cast
Hardness* | Brinell Hardness (500 kg load) | 50 |
Tensile Strength** | KSI | 25 |
Yield Strength ** | KSI (0.5% Ext. under load) | 12 |
Elongation** | % in 2 inch | 15 |
**Test values are nominal approximations and depend on specimen size and orientation.
Physical Properties
Thermal Conductivity | BTU/ (sq ft-ft-hr-F) | 30 |
Specific Heat | BTU/lb/ºF @ 68F | .09 |
Thermal Expansion | Per °F from 68 F to 392 F | .0000103 |
Density | lb/cu in @ 68 F | .340 |
Electrical Conductivity* (Annealed) | % IACS @ 68 F | 10 |
Modulus of Elasticity | KSI | 10,500 |
*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) | 80 |
Suitability for being joined by: | Soldering/Good |
Brazing/Poor* | |
Oxyacetylene Welding/Not Recommended | |
Gas Shielded Arc Welding/Not Recommended | |
Coated Metal Arc Welding/Not Recommended |