Cast C89831
C89831 is a C844 lead-free replacement alloy. C89831 supports the market demand for lead-free material and compliance with the 3874 Reduction of Lead in Drinking Water Act (effective January 2014).
Information
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: C89831 is compliant with key legislation including (1) Federal Safe Drinking Water Act 1974 - SDWA, (2) Federal Reduction of Lead in Drinking Water Act 2011 and (3) California AB1953
Typical uses
Industrial: corrosion-resistant/pressure-tight castings, high-speed/heavy-pressure bearings, impellers, pumps
Chemical composition
| Cu%1 | Pb% | Sn% | Zn% | Fe% | P% | Ni%2 | Al% | Bi% | S% | Sb% | Si% |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 87.00-91.00 | 0.10 | 2.70-3.70 | 2.00-4.00 | 0.30 | 0.05 | 1.00 | 0.005 | 2.70-3.70 | 0.08 | 0.25 | 0.005 |
1 .01-2.0% as any single or combination of Ce La or other rare earth(x) elements as agreed upon. (x)ASM International definition: one of the group of chemically similar metals with atomic numbers 57 through 71 commonly referred to as lanthanides. 2 Ni value includes Co.
Note: Cu + sum of named elements, 99.0% min. Single values represent maximums.
Machinability
| Copper alloy UNS no. | Machinability rating | Density (lb / in³ at 68°F) |
|---|---|---|
| C89831 | 85 | 0.318 |
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 | |
| 29 | 200 | 13 | 90 | 5 | 55 | |
Physical properties
| US Customary | Metric | |
|---|---|---|
| Melting point - liquidus | 1893 °F | 1033 °C |
| Melting point - solidus | 1518 °F | 825 °C |
| Density | 0.318 lb/in³ at 68 °F3 | 8.81 gm/cm³ at 20 °C |
| Specific gravity | 8.81 | 8.81 |
| Electrical conductivity | 20.38% IACS at 68 °F | 0.117 MegaSiemens/cm at 20 °C |
| Thermal conductivity | 50 Btu/sq ft/ft hr/°F at 68 °F | 86.6 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 | 0.092 Btu/lb/°F at 68 °F | 385.4 J/kg at 20 °C |
| Modulus of elastic in tension | 13700 ksi | 94458 MPa |
Fabrication properties
| Technique | Suitability |
|---|---|
| Soldering | Excellent |
| Brazing | Good |
| Oxyacetylene welding | Not recommended |
| Gas shielded arc welding | Not recommended |
| Coated metal arc welding | Poor |
| Machinability rating | 85 |
Fabrication properties provided by CDA