CuZn39Pb2
CW612NFree-cutting brass with 2% lead. Good machinability (80% of CuZn39Pb3) with slightly better cold formability. Used for fittings, valves, electrical connectors, and turned parts where slightly less Pb is acceptable or required by regulation. ≈ UNS C37700.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | UNS | USA | UNS C37700 (approx) | C37700 | REF |
| 🇪🇺 | EN | Europe | CuZn39Pb2 | CW612N | 100% |
Sources: ASTM B124, EN 12164
Chemical composition comparison (wt%)
Side-by-side: CuZn39Pb2 (EN) (EN 12164) vs CuZn39Pb2 (EN) (EN 12164)
| Element | CuZn39Pb2 (EN) | CuZn39Pb2 (EN) | Overlap |
|---|---|---|---|
| Ni | 0–0.3% | 0–0.3% | OK |
| Cu | 59–62% | 59–62% | OK |
| Al | 0–0.05% | 0–0.05% | OK |
| Zn | — | — | — |
| Pb | 1.6–2.5% | 1.6–2.5% | OK |
| Fe | 0–0.3% | 0–0.3% | OK |
| Sn | 0–0.3% | 0–0.3% | OK |
Mechanical properties
As Drawn
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 410–550 | MPa |
| Yield Strength | ≥ 250 | MPa |
| Elongation | ≥ 10 | % |
| Hardness HB | 100–160 | HB |
| Elastic Modulus | ≥ 100 | GPa |
| Density | ≥ 8.45 | g/cm3 |
Related materials
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CuZn36Pb3
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CuSn6
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