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| Adding Ni and Zn elements to the copper matrix results in a silver white alloy with excellent comprehensive mechanical properties, deep drawing performance, excellent corrosion resistance, and good cold working formability. It can be used to manufacture crystal resonators, musical instruments, eyeglass frames, and decorations. | |||||||
| Grade | Chemical composition（%） | Thickness (mm) |
|||||
| GB | ASTM | JIS | Cu | Ni+Co | Fe | Zn | |
| BZn12-24 | C75700 | C7451 | 63.0-66.0 | 11.0-13.0 | ≤0.3 | Balance | 0.08-5.0 |
| Physical properties | |||||||
| Density (g/cm³) |
Modulus of elasticity (GPa) |
Thermal expansion coefficient (×10-6/K) |
Electrical conductivity (%IACS) |
Thermal conductivity W(m·K) |
|||
| 8.7 | 125 | 16.2 | 7 | 40 8 |
|||
| Mechanical properties | Bend properties | ||||||
| Temper | Hardness HV |
Tension test | 90°R/T(Thick＜0.5mm) | ||||
| Tensile Strength Rm/MPa |
Yield Strength MPa |
Elongation % |
Good way | Bad way | |||
| O60 | – | ≥325 | – | ≥25 | 0 | 0 | |
| H02 | 105-155 | 390-510 | – | ≥10 | 1 | 1 | |
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