Copper Alloy No. C93800
Copper Alloy No. C93800
High Leaded Tin Bronze SAE 67 , CDA 938 , 78-7-15
ASTM B 505 , ASTM B 271, ASTM B 584
Chemical Composition % by weight
High Leaded Tin Bronze SAE 67 , CDA 938 , 78-7-15
ASTM B 505 , ASTM B 271, ASTM B 584
Chemical Composition % by weight
| Element | Nominal | Minimum | Maximum |
| Aluminum | - | - | .005 |
| Antimony | - | - | .8 |
| Copper | 77 | 75 | 79 |
| Iron | - | - | .15 |
| Lead | 14.5 | 13 | 16 |
| Nickel | - | - | 1 |
| Phosphorus | - | - | .05 |
| Silicon | - | - | .005 |
| Sulfur | - | - | .08 |
| Tin | 6.9 | 6.3 | 7.5 |
| Zinc | - | - | .8 |
Applications
Bearings for general service and moderate pressures, pump impellers and bodies for use in acid mine water.Turbocharger bearings.
Mechanical Properties
M07 - As Continuous Cast
| Hardness* | Brinell Hardness (500 kg load) | 55 |
| Tensile Strength** | KSI | 30 |
| Yield Strength ** | KSI (0.5% Ext. under load) | 16 |
| Elongation** | % in 2 inch | 18 |
**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 400 F | .0000103 |
| Density | lb/cu in @ 68 F | .334 |
| Electrical Conductivity* (Annealed) | % IACS @ 68 F | 11.5 |
| 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 |