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| Alloy No. | Chemical Composition | |||
| Cu | Mn | Ni | Zn | |
| C7521 | 62.0-66 | 0-0.5 | 16.5-19.5 | Remainder |
| C7541 | 60.0-64 | 0-0.5 | 12.5-15.5 | Remainder |
| C7701 | 54.0-58 | 0-0.5 | 16.5-19.5 | Remainder |
| Grade. | Condition | Thickness (mm) |
Tensile strength (Mpa) |
Elongation (%) |
Hardness (HV) |
| CuNi15Zn20 | M | ≥0.3 | ≥340 | ≥35 | |
| Y2 | 440~570 | ≥5 | |||
| Y | 540~690 | ≥1.5 | |||
| T | ≥640 | ≥1 | |||
| CuNi18Zn20 | M | 0.15~1.2 | ≥375 | ≥20 | --- |
| Y2 | 440~570 | ≥5 | 120~180 | ||
| Y | ≥540 | ≥3 | ≥150 | ||
| CuNi18Zn27 | M | 0.15~1.0 | ≥400 | ≥40 | --- |
| Y2 | 540~655 | ≥8 | 150~210 | ||
| Y | 630~735 | ≥4 | 180~240 | ||
| T | 705~805 | --- | 210~260 | ||
| CuNi19 | M | ≥0.2 | ≥290 | ≥25 | -- |
| Y | ≥390 | ≥3 | -- | ||
| CuNi30 | M | ≥0.2 | ≥370 | ≥23 | 85-125 |
| Y | ≥540 | ≥3 | ≥150 |
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