C94300 / CDA 943 Leaded Tin Bronze Alloys
Specification :
| CDA | ASTM | Asarcon | SAE | AMS | Federal | Military | Other |
|---|---|---|---|---|---|---|---|
| C943 | B505 B505M |
520 | QQ-C-390, E1; QQ-B-1005, COMP 18 | MIL-B-16261, Grade V | Soft Bronze |
Chemical Composition (according to ASTM B505/B505M-14)
| Cu% | Pb% | Sn% | Zn% | Fe% | P%1 | Ni%2 | Al% | S%3 | Sb% | Si% | |
|---|---|---|---|---|---|---|---|---|---|---|---|
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Chemical Composition according to ASTM B505/B505M-18
1For continuous castings, P shall be 1.5% max. 2Ni value includes Co. 3For continuous castings, S shall be 0.25% max.
Note: Cu + Sum of Named Elements, 99.0% min. Single values represent maximums.
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| 67.00- 72.00 |
23.00- 27.00 |
4.50- 6.00 |
0.80 | 0.15 | 0.08 | 1.00 | 0.005 | 0.08 | 0.80 | 0.005 | |
Machinability :
| Copper Alloy UNS No. | Machinability Rating | Density (lb/in3 at 68 °F) |
|---|---|---|
| C943 | 80 | 0.336 |
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 | ||||||
| 21 | 145 | 15 | 103 | 7 | 45 | ||||||
Physical Properties :
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Physical Properties provided by CDA
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| US Customary | Metric | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Density | 0.336 lb/in3 at 68 °F | 9.3 gm/cm3 at 20 °C | |||||||||
| Specific Gravity | 9.3 | 9.3 | |||||||||
| Electrical Conductivity | 9% IACS at 68 °F | 0.053 MegaSiemens/cm at 20 °C | |||||||||
| Thermal Conductivity | 36.2 Btu · ft/(hr · ft2 · °F) at 68 °F | 62.7 W/m at 20 °C | |||||||||
| Specific Heat Capacity | 0.09 Btu/lb/°F at 68 °F | 377.1 J/kg at 293 °C | |||||||||
| Modulus of Elasticity in Tension | 10500 ksi | 72400 MPa | |||||||||
| Incipient Melting | 600 °F | 316 °C | |||||||||
| 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 | Poor | ||||||||||
| 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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