C84400 / CDA 844 Red Brass Bronze Alloys
Specification :
| CDA | ASTM | Asarcon | SAE | AMS | Federal | Military | Other |
|---|---|---|---|---|---|---|---|
| C844 | B505 B505M B145-5A |
37 | QQ-C-390, B2; QQ-B-1005, COMP 11 |
MIL-B11553, COMP 11 | Valve Metal |
Chemical Composition :
| Cu%1 | Pb% | Sn% | Zn% | Fe% | P% | Ni%2 | Al% | S% | Sb% | 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.
|
|||||||||||
| 78.00- 82.00 |
6.00- 8.00 |
2.30- 3.50 |
7.00- 10.00 |
0.40 | 0.02 | 1.00 | 0.005 | 0.08 | 0.25 | 0.005 | |
Machinability :
| Copper Alloy UNS No. | Machinability Rating | Density (lb/in3 at 68 °F) |
|---|---|---|
| C844 | 90 | 0.314 |
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 | ||||||
| 30 | 207 | 15 | 103 | 16 | 55 | ||||||
Physical Properties :
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Physical Properties provided by CDA
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| US Customary | Metric | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Melting Point – Liquidus | 1840 °F | 1004 °C | |||||||||
| Melting Point – Solidus | 1549 °F | 843 °C | |||||||||
| Density | 0.314 lb/in3 at 68 °F | 8.69 gm/cm3 at 20 °C | |||||||||
| Specific Gravity | 8.69 | 8.69 | |||||||||
| Electrical Conductivity | 16.4% IACS at 68 °F | 0.095 MegaSiemens/cm at 20 °C | |||||||||
| Thermal Conductivity | 41.8 Btu/sq ft/ft hr/°F at 68 °F | 72.4 W/m at 20 °C | |||||||||
| Coefficient of Thermal Expansion 68-572 | 10 · 10-6 per °F (68-572 °F) | 17.3 · 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 | 13000 ksi | 89600 MPa | |||||||||
| Magnetic Permeability | 1 | 1 | |||||||||
Fabrication Properties :
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Fabrication Properties provided by CDA
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| Joining Technique | Suitability | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Soldering | Excellent | ||||||||||
| Brazing | Good | ||||||||||
| Oxyacetylene Welding | Not Recommended | ||||||||||
| Gas Shielded Arc Welding | Not Recommended | ||||||||||
| Coated Metal Arc Welding | Fair | ||||||||||