Copper Sand Cast Alloy (UNS C89844) – Mechanical Properties
Copper UNS C89844 has a copper content of not less than 83%.
The following table shows the mechanical properties of UNS C89844 sand cast alloy as a function of heat treatment.
| Temper | Tensile Str. | Yield Str. | Elong. |
|---|---|---|---|
| M01 | 234MPa (34ksi) | 103MPa (15ksi) | 30% |
The chemical composition of UNS C89844 copper alloy is outlined in the following table.
| Cu% | Pb% | Sn% | Zn% | Fe% | P% | Ni%1 | Al% | Bi% | S% | Sb% | Si% |
|---|---|---|---|---|---|---|---|---|---|---|---|
Chemical composition provided by CDA 1Ni value includes Co. Note: Cu + sum of named elements, 99.3% min. Single values represent maximums. | |||||||||||
| 83.00- 86.00 | 0.20 | 3.00- 5.00 | 7.00- 10.00 | 0.30 | 0.05 | 1.00 | 0.005 | 2.00- 4.00 | 0.08 | 0.25 | 0.005 |
C89844 Product description: Bismuth tin bronze
Solids: 1/2″ to 10″ O.D.
Tubes: 1 1/8″ to 9″ O.D.*
Rectangles: Up to 15″
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
Compliance: C89844 is compliant with key legislation including (1) Federal Safe Drinking Water Act – SDWA, (2) S. 3874 Federal Reduction of Lead in Drinking Water Act, (3) California AB1953, and (4) Vermont Act 193
*Consult mill for wall thickness
Typical uses
Plumbing: fittings/valves for potable water
Chemical composition
| Cu% | Pb% | Sn% | Zn% | Fe% | P% | Ni%1 | Al% | Bi% | S% | Sb% | Si% |
|---|---|---|---|---|---|---|---|---|---|---|---|
Chemical composition provided by CDA 1Ni value includes Co. Note: Cu + sum of named elements, 99.3% min. Single values represent maximums. | |||||||||||
| 83.00- 86.00 | 0.20 | 3.00- 5.00 | 7.00- 10.00 | 0.30 | 0.05 | 1.00 | 0.005 | 2.00- 4.00 | 0.08 | 0.25 | 0.005 |
Machinability
| Copper alloy UNS No. | Machinability rating | Density (lb/in3 at 68 °F) |
|---|---|---|
| C89844 | 70 | 0.31 |
Mechanical properties
| 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 | |
| 28 | 193 | 13 | 90 | 5 | 55 | |
Physical properties
Physical properties provided by CDA | |||||||||||
| US Customary | Metric | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Melting point – liquidus | 1850 °F | 1010 °C | |||||||||
| Melting point – solidus | 1550 °F | 853 °C | |||||||||
| Density | 0.310 lb/in3 at 68 °F | 8.58 gm/cm3 at 20 °C | |||||||||
| Specific gravity | 8.58 | 8.58 | |||||||||
| Electrical conductivity | 16.8% IACS at 68 °F | 0.095 MegaSiemens/cm at 20 °C | |||||||||
| Thermal conductivity | 46.7 Btu/sq ft/ft hr/°F at 68 °F | 80.9 W/m at 20 °C | |||||||||
| Coefficient of thermal expansion 68-392 | 10 · 10-6 per °F (68-392 °F) | 17.3 · 10-6 per °C (20-200 °C) | |||||||||
| Specific heat capacity | 0.08 Btu/lb/°F at 68 °F | 335.2 J/kg at 20 °C | |||||||||
| Modulus of elasticity in tension | 13000 ksi | 89622 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. | |||||||||||
| Technique | Suitability | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Soldering | Excellent | ||||||||||
| Brazing* | Good | ||||||||||
| Oxyacetylene welding | Not recommended | ||||||||||
| Gas shielded arc welding | Not recommended | ||||||||||
| Coated metal arc welding | Not recommended | ||||||||||
| Machinability rating | 70 | ||||||||||
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. |
