New lead-free copper alloys (Kurika Bronze)
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【Special Permit No.3946244】
Features
- Reduces defects during casting (compared to our company's products)
- Inclusion of nickel is excellent for pressure resistance. Suitable for thick-walled cast metal as well.
- Casting design is made possible by conforming to JIS H5120 CAC406 standards
- Through the balance of Ni-P-Sn levels, has excellent machinability and workability through the balancing of Ni-P-Sn levels
- Environmentally-friendly chemical components. (Selenium, Antimony-free copper alloy)
- Mechanical properties conform to JIS H5120 CAC406 standards
Chemical Components
1.5 to 3.0 nickel is added to Cu-Sn-Zn-Bi-P
Graph 1 Major Chemical Components (by wt%)
| Type | Ni | Sn | Zn | Bi | P | Pb | Cu |
|---|---|---|---|---|---|---|---|
| KURIKA BRONZE Ingot JIS H2202 CACIn904 |
1.5-2.5 | 3.0-5.0 | 6.0-9.0 | 1.0-2.0 | ≦0.03 | ≦0.1 | Bal. |
| KURIKA BRONZE Casting JIS H5120 CAC904 |
1.5-2.5 | 3.0-5.0 | 6.0-9.0 | 1.0-2.0 | ≦0.05 | ≦0.25 | Bal. |
| KURIKA BRONZE Continuous Casting JIS H5120 CAC904C |
1.5-2.5 | 3.0-5.0 | 6.0-9.0 | 1.0-2.0 | ≦0.5 | ≦0.25 | Bal. |
| CDA C89845 | 1.5-2.5 | 3.0-5.0 | 6.0-9.0 | 1.0-2.0 | ≦0.05 | ≦0.09 | Bal. |
| Chemical Composition Example |
1.7 | 4.0 | 7.0 | 1.7 | ≦0.05 | ≦0.25 | Bal. |
Mechanical Properties
Mechanical properties conform to CAC406.
Machinability
- Concerning the machinability coefficient, on the condition that of CAC406 is 100, the Kurika Bronze is from 80 to 90.
- The superior Machinability, because of Bi-Ni compound-containing.
- Chip Shapes are fine, and conventional machining method could be applied.
CAC406C |
Kurika Bronze |
Why the inclusion of Ni?
With the inclusion of Ni, Ni-Sn compounds and Ni-P compounds are generated around the Bi atoms, thus improving pressure resistance and cutting performance.
