HPb59-1 VS. CW617N
The closest equivalent grade of HPb59-1 in European standards is CW617N (CuZn39Pb2), also often referred to as CuZn39Pb1, which complies with the EN 12164 standard. Below is a detailed breakdown:
Chemical Composition Comparison:
| Composition | China GB/T 5231 HPb59-1 | Europe EN CW617N (CuZn39Pb2) |
|---|---|---|
| Cu | 57.0-60.0% | 57.0-59.0% |
| Pb | 0.8-1.9% | 1.5-2.5% |
| Zn | Remainder | Remainder |
| Impurities | Fe≤0.5%, Sn≤0.3%, Others≤0.5% | Fe≤0.5%, Sn≤0.2%, Ni+Co≤0.5% |
Key Notes:
1. Main Differences:
The lead content range of CW617N (1.5-2.5%) is slightly higher than the lower limit of HPb59-1 (0.8%). The minimum copper content of the two grades is the same, but the maximum copper content of CW617N is slightly lower (59.0% vs 60.0%).
2. Alternative Grade Reference:
If a European grade with lead content closer to HPb59-1 is required, CW612N (CuZn39Pb3) can be considered. However, its lead content is higher (1.8-2.5%), making it more suitable for scenarios with higher requirements for machinability.
3. Application Compatibility:
Both grades are free-cutting leaded brasses, applicable to products requiring good machining performance such as plumbing valves, pipe fittings, and hardware. In actual procurement and production, the selection can be made according to specific composition requirements.
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