High Leaded Tin Bronze SAE 64 , CDA 937 , 80-10-10
ASTM B 505 , ASTM B 271
Chemical Composition % by weight
| Element | Nominal | Minimum | Maximum |
| Aluminum | - | - | .005 |
| Antimony | - | - | .55 |
| Copper | 80 | 78 | 82 |
| Iron | - | - | .15 |
| Lead | 10 | 8 | 11 |
| Nickel | - | - | 1 |
| Phosphorus | - | - | .15 |
| Silicon | - | - | .005 |
| Sulfur | - | - | .08 |
| Tin | 10 | 9 | 11 |
| Zinc | - | - | .8 |
C93700 has excellent machining properties, medium strength and good corrosion resistance and will withstand mild acids as found in mine water.
Bearings manufactured from C93700 have excellent wear resistance under conditions of high speed, heavy pressure and vibration, have low friction and can be used where lubrication is less than adequate and there may be minor misalignment. C93700 bearings require a hardened shaft and maximum shaft surface speeds of 4 m/sec can be tolerated.
Applications
Bearings for high speed and heavy pressures, pumps, impellers, corrosion resistant applications, pressure tight castings.
Mechanical Properties
M07 - As Continuous Cast
| Hardness* | Brinell Hardness (500 kg load) | 60 |
| Tensile Strength** | KSI | 35 |
| Yield Strength ** | KSI (0.5% Ext. under load) | 20 |
| Elongation** | % in 2 inch | 20 |
**Test values are nominal approximations and depend on specimen size and orientation.
Physical Properties
| Thermal Conductivity | BTU/ (sq ft-ft-hr-F) | 27.1 |
| Specific Heat | BTU/lb/ºF @ 68F | .09 |
| Thermal Expansion | Per °F from 68 F to 392 F | .0000103 |
| Density | lb/cu in @ 68 F | .320 |
| Electrical Conductivity* (Annealed) | % IACS @ 68 F | 10 |
| Modulus of Elasticity | KSI | 11,000 |
*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) | 80 |
| Suitability for being joined by: | Soldering/Good |
| Brazing/Good* | |
| Oxyacetylene Welding/Not Recommended | |
| Gas Shielded Arc Welding/Not Recommended | |
| Coated Metal Arc Welding/Not Recommended |