C93700 / CDA 937 Leaded Tin Bronze Alloys
Specification :
| CDA | ASTM | Asarcon | SAE | AMS | Federal | Military | Other Desc |
|---|---|---|---|---|---|---|---|
| C937 | B505 B505M B144-3A |
1010 | 64 J461 J462 |
QQ-C-390, E10 | MIL-B-11553, COMP 23 | Bearing Bronze |
Chemical Composition :
| Cu% | Pb% | Sn% | Zn% | Fe%1 | P%2 | Ni%3 | Al% | S% | Sb% | Si% | |
|---|---|---|---|---|---|---|---|---|---|---|---|
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Chemical Composition according to ASTM B505/B505M-18
1Fe shall be .35% max., when used for steel-backed bearings. 2For continuous castings, P shall be 1.5%, max. 3Ni value includes Co.
Note: Cu + Sum of Named Elements, 99.0% min. Single values represent maximums.
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| 78.00- 82.00 |
8.00- 11.00 |
9.00- 11.00 |
0.80 | 0.70 | 0.10 | 0.50 | 0.005 | 0.08 | 0.50 | 0.005 | |
Machinability :
| Copper Alloy UNS No. | Machinability Rating | Density (lb/in3 at 68 °F) |
|---|---|---|
| C937 | 80 | 0.32 |
Mechanical Properties :
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Mechanical Properties according to ASTM B505/B505M-18
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| Tensile Strength, min | Yield Strength, at .5% Extension Under Load, min | Elongation, in 2 in. or 50 mm min | Brinell Hardness (500 kg load) | Remarks | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| ksi | MPa | ksi | MPa | % | typical BHN | ||||||
| 35 | 241 | 20 | 138 | 6 | 60 | ||||||
Physical Properties :
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Physical Properties provided by CDA
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| US Customary | Metric | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Melting Point – Liquidus | 1705 °F | 929 °C | |||||||||
| Melting Point – Solidus | 1403 °F | 762 °C | |||||||||
| Incipient Melting | 600 °F | 316 °C | |||||||||
| Density | 0.32 lb/in3 at 68 °F | 8.86 gm/cm3 at 20 °C | |||||||||
| Specific Gravity | 8.86 | 8.86 | |||||||||
| Electrical Conductivity | 10% IACS at 68 °F | 0.059 MegaSiemens/cm at 20 °C | |||||||||
| Thermal Conductivity | 27.1 Btu/sq ft/ft hr/°F at 68 °F | 46.9 W/m at 20 °C | |||||||||
| Coefficient of Thermal Expansion 68-392 | 10.3 · 10-6 per °F (68°-392 °F) | 17.8 · 10-6 per °C (20°-200 °C) | |||||||||
| Specific Heat Capacity | 0.09 Btu/lb/°F at 68 °F | 377.1 J/kg at 20 °C | |||||||||
| Modulus of Elasticity in Tension | 11000 ksi | 75800 MPa | |||||||||
| Magnetic Permeability | 1 | 1 | |||||||||
Fabrication Properties :
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Fabrication Properties provided by CDA
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| Joining Technique | Suitability | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Soldering | Good | ||||||||||
| Brazing | Good | ||||||||||
| Oxyacetylene Welding | Not Recommended | ||||||||||
| Gas Shielded Arc Welding | Not Recommended | ||||||||||
| Coated Metal Arc Welding | Not Recommended | ||||||||||
Thermal Properties :
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Thermal Properties provided by CDA
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| Treatment | Temp./Time – US | Temp./Time – SI | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Stress Temperature | 500 | 260 | |||||||||
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| Solution Time | 0.0 | ||||||||||
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