C85700 / CDA 857 Yellow Brass Alloys
Specification :
| CDA | ASTM | Asarcon | SAE | AMS | Federal | Military | Other |
|---|---|---|---|---|---|---|---|
| C857 | B505 B505M |
QQ-C-390, A1; QQ-B-621, CLASS A |
MIL-C-15345, ALLOY 3 | Leaded Naval Brass |
Chemical Composition :
| Cu%1 | Pb% | Sn% | Zn% | Fe% | Ni%2 | Al% | Si% | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Chemical Composition according to ASTM B505/B505M-18
1In determining Cu min., Cu may be calculated as Cu + Ni. 2Ni value includes Co.
Single values represent maximums.
|
|||||||||||
| 58.00- 64.00 |
0.80- 1.50 |
0.50- 1.50 |
32.00- 40.00 |
0.70 | 1.00 | 0.80 | 0.05 | ||||
Machinability :
| Copper Alloy UNS No. | Machinability Rating | Density (lb/in3 at 68 °F) |
|---|---|---|
| C857 | 80 | 0.304 |
Mechanical Properties :
|
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 2in. or 50mm min | Brinell Hardness (500 kg load) | Remarks | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| ksi | MPa | ksi | MPa | % | typical BHN | ||||||
| 40 | 276 | 14 | 97 | 15 | 75 | ||||||
Physical Properties :
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Physical Properties provided by CDA
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| US Customary | Metric | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Melting Point – Liquidus | 1725 °F | 941 °C | |||||||||
| Melting Point – Solidus | 1675 °F | 913 °C | |||||||||
| Density | 0.304 lb/in3 at 68 °F | 8.41 gm/cm3 at 20 °C | |||||||||
| Specific Gravity | 8.41 | 8.41 | |||||||||
| Electrical Conductivity | 22% IACS at 68 °F | 0.128 MegaSiemens/cm at 20 °C | |||||||||
| Thermal Conductivity | 48.5 Btu/sq ft/ft hr/°F at 68 °F | 83.9 W/m at 20 °C | |||||||||
| Coefficient of Thermal Expansion 68-572 | 12 · 10-6 per °F (68-572 °F) | 20.7 · 10-6 per °C (20-300 °C) | |||||||||
| Specific Heat Capacity | 0.09 Btu/lb/°F at 68 °F | 377.1 J/kg at 293 °C | |||||||||
| Modulus of Elasticity in Tension | 14000 ksi | 87000 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 | Fair | ||||||||||
| Oxyacetylene Welding | Not Recommended | ||||||||||
| Gas Shielded Arc Welding | Not Recommended | ||||||||||
| Coated Metal Arc Welding | Not Recommended | ||||||||||