| Adding Ni and Zn elements to the copper matrix results in a silver white alloy with excellent mechanical properties, deep drawing properties, good cold working formability, and easy cutting. It can be used to manufacture precision parts such as communication shielding forest materials, instruments and meters, medical equipment, daily necessities, and decorations. | ||||||
| Grade | Chemical composition（%） | |||||
| GB | ASTM | JIS | Cu | Ni+Co | Fe | Zn |
| BZn18-18 | C75200 | C7521 | 63.0-66.5 | 16.5-19.5 | ≤0.25 | Balance |
| 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 | 6.0 | 33 | ||
| 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 | 90-120 | ≥375 | ≥190 | ≥25 | 0 | 0 |
| H02 | 120-180 | 440-570 | ≥250 | 12-20 | 0 | 1 |
| H04 | 150-210 | 540-640 | ≥420 | 5-18 | 1 | 3 |
| H06 | ≥185 | ≥610 | ≥520 | - | - | - |
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