C94700 Nickel Tin Bronze
C94700
Product description Nickel-tin bronze
Solids: 1/2" to 10" O.D.
Tubes: 1" to 16" O.D.*
Rectangles: Up to 20"
Standard lengths: 144"
Shape/Form: Semi-finished, mill stock or near-net shapes, anode, bar stock, billet/bloom, squares, hex, plate, profile or structural shape, flats/rectangular bar
*Consult mill for wall thickness
Typical uses
Electrical: Circuit breaker parts
Industrial: Bearings, feeding mechanisms, gears, nozzles, piston cylinders, shift forks, valve components, wear guides
Note: Also available in heat-treated condition.
Similar or equivalent specification
| CDA | ASTM | SAE | AMS | Federal | Military | Other |
|---|---|---|---|---|---|---|
| C94700 | B505 B505M B947 B292-A |
J461 J462 |
QQ-C-390, F2 | Cast Nickel-tin bronze |
Chemical composition
| Cu% | Pb%1 | Sn% | Zn% | Fe% | P% | Ni%2 | Al% | Mn% | S% | Sb% | Si% |
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Chemical composition according to ASTM B505/B505M-23 1It is possible that the mechanical requirements of Copper alloy UNS No. C94700 in the heat-treated condition will not be attained if the lead content exceeds 0.01%. 2Ni value includes Co. Note: Cu + sum of named elements, 98.7% min. Single values represent maximums. |
|||||||||||
| 85.00- 90.00 |
0.09 |
4.50- 6.00 |
1.00- 2.50 |
0.25 |
0.05 |
4.50- 6.00 |
0.005 |
0.20 |
0.05 |
0.15 |
0.005 |
Machinability
| Copper alloy UNS No. | Machinability rating | Density (lb/in3 at 68 °F) |
|---|---|---|
| C94700 | 30 | 0.32 |
Mechanical properties
|
Mechanical properties according to ASTM B505/B505M-23 |
|||||||||||
| Tensile strength, min | Yield strength, at 0.5% extension under load, min | Elongation, in 2 in. or 50 mm min | Brinell hardness (500 kg load) | Remarks | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| ksi | MPa | ksi | MPa | % | typical BHN | ||||||
| 45 | 310 | 20 | 138 | 25 | 85 | ||||||
Physical properties
|
Physical properties provided by CDA |
|||||||||||
| US Customary | Metric | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Melting point - liquidus | 1880 °F | 1027 °C | |||||||||
| Melting point - solidus | 1660 °F | 904 °C | |||||||||
| Density | 0.32 lb/in3 at 68 °F | 8.86 gm/cm3 at 20 °C | |||||||||
| Specific gravity | 8.86 | 8.86 | |||||||||
| Electrical conductivity | 12% IACS at 68 °F | 0.07 MegaSiemens/cm at 20 °C | |||||||||
| Thermal conductivity | 31.2 Btu/sq ft/ft hr/°F at 68 °F | 54 W/m at 20 °C | |||||||||
| Coefficient of thermal expansion 68-392 | 10.9 ·10-6 per °F (68-392 °F) | 18.8 ·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 | 15000 ksi | 103400 MPa | |||||||||
Fabrication properties
|
Fabrication properties provided by CDA *Since brazing is performed within the hot-short range, strain must be avoided during brazing and cooling. |
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| Technique | Suitability | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Soldering | Excellent | ||||||||||
| Brazing* | Excellent | ||||||||||
| Oxyacetylene welding | Fair | ||||||||||
| Gas shielded arc welding | Good | ||||||||||
| Coated metal arc welding | Good | ||||||||||
| Machinability rating | 30 | ||||||||||
Thermal properties
|
Thermal properties provided by CDA *Temperature is measured in fahrenheit. **For stress relief, solution treatment and annealing - time is measured in hours/inch of thickness. For precipitation heat treatment - time is measured in hours. |
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| Treatment | Min* | Max* | Value* | Time** | Medium | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Stress relief | 500 | ||||||||||
| Solution treatment | 1425 | 1475 | 2 | Water | |||||||
| Precipitation treatment | 580 | 5 | Air | ||||||||
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