Cast C89844
C89844 is a C844 lead-free replacement alloy. C89844 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: C89844 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
Plumbing: fittings/valves for potable water
Chemical composition
| Cu% | Pb% | Sn% | Zn% | Fe% | P% | Ni%1 | Al% | Bi% | S% | Sb% | Si% |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 |
¹Ni value includes Co.
Note: Cu + sum of named elements, 99.3% min. Single values represent maximums.
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
| US Customary | Metric | |
|---|---|---|
| Melting point - liquidus | 1850 °F | 1010 °C |
| Melting point - solidus | 1550 ° | 853 °C |
| Density | 0.310 lb/in³ at 68 °F3 | 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 elastic in tension | 13000 ksi | 89622 MPa |
Fabrication properties
| 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 |
Fabrication properties provided by CDA
*Since brazing is performed withing the hot-short range, strain must be avoided during brazing and cooling.
Thermal properties
| Treatment | Value* | Time** |
|---|---|---|
| Stress relief | 500 | |
| Solution treatment | 0 |
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.