CDA676 Manganese Bronze
CDA676 Manganese Bronze is a copper-zinc alloy with iron, lead, manganese and tin additions. It is suitable for components that require good hot forming capacity, brazing performance and machinability.
- Description
- Product Specifications
Description
CDA676 Manganese Bronze is used for industrial components where strength, formability and reliable bronze performance are required. The alloy is listed for applications such as gate valve stems, welding rods and valve balls.
This material offers excellent soldering and brazing suitability, good oxyacetylene welding and spot welding performance, and excellent hot forming capacity. It has a forgeability rating of 80 and a machinability rating of 60.
Key Features:
- Manganese bronze alloy
- Excellent soldering and brazing suitability
- Good oxyacetylene welding and spot welding suitability
- Excellent hot forming capacity
- Forgibility rating of 80
- Machinability rating of 60
- Poor cold working capacity
- Used for gate valve stems, welding rods and valve balls
| Element | Composition | Nominal |
|---|---|---|
| Copper (Cu) | 57.0-60.0% | 58.5% |
| Iron (Fe) | 0.40-1.3% | 0.8% |
| Lead (Pb) | 0.50-1.0% | 0.7% |
| Manganese (Mn) | 0.05-0.50% | 0.27% |
| Tin (Sn) | 0.50-1.5% | 1.0% |
| Zinc (Zn) | Remainder | 38.7% |
| Cu + Named Elements | 99.5% min | – |
| Form | Temper | Section Size | Tensile Strength | Yield Strength | Rockwell Hardness |
|---|---|---|---|---|---|
| Rod | H01 | 50.8 mm | 496 MPa | 290 MPa | 77 B |
| Rod | H02 | 25.4 mm | 579 MPa | 414 MPa | 90 B |
| Rod | O60 | – | 448 MPa | 207 MPa | 65 B |
| Rod | H01 | 25.4 mm | 531 MPa | 310 MPa | 83 B |
| Melting Point – Liquidus | 890°C |
|---|---|
| Melting Point – Solidus | 865°C |
| Density | 8.36 g/cm³ at 20°C |
| Electrical Conductivity | 0.139 MegaSiemens/cm at 20°C |
| Thermal Conductivity | 105.7 W/m.K at 20°C |
| Coefficient of Thermal Expansion | 20.4 x 10⁻⁶ per °C, 20-300°C |
| Modulus of Elasticity | 103400 MPa |
| Modulus of Rigidity | 38600 MPa |
| Soldering | Excellent |
|---|---|
| Brazing | Excellent |
| Oxyacetylene Welding | Good |
| Gas Shielded Arc Welding | Fair |
| Spot Weld | Good |
| Cold Working | Poor |
| Hot Forming | Excellent |
| Forgeability Rating | 80 |
| Machinability Rating | 60 |
| Applicable Specifications | AWS A5.8 and ASTM B283 |
| Typical Uses | Gate valve stems, welding rods and valve balls |
