Weight %. A standard free-cutting brass with ~1% lead for clean machining.
| Element | Symbol | Min % | Max % | Typical % |
|---|---|---|---|---|
| Copper | Cu | 60.0 | 61.0 | 60.5 |
| Zinc | Zn | Balance | ~38 | |
| Lead | Pb | 0.8 | 1.6 | 1.2 |
| Iron | Fe | — | 0.30 | 0.08 |
| Nickel | Ni | — | 0.30 | 0.05 |
| Property | Condition | Value | Unit |
|---|---|---|---|
| Tensile Strength (Rm) | EN 12164, temper-dep. | 360–500 | MPa |
| Proof Stress (Rp0.2) | EN 12164, temper-dep. | 250–350 | MPa |
| Elongation (A) | EN 12164, temper-dep. | 8–20 | % |
| Hardness | temper-dependent | 70–130 | HB |
| Machinability | vs CuZn39Pb3 = 100 | ~70% | — |
| Density | 20 °C | 8.44 | g/cm³ |
| Thermal Conductivity | — | ~117 | W/(m·K) |
| Melting Range | solidus–liquidus | 880–900 | °C |
| Standard | Designation |
|---|---|
| EN (Europe) | CW607N / CuZn38Pb1 |
| UNS / ASTM (USA) | C37000 |
| BS (UK legacy) | CZ129 |
| DIN (Germany) | CuZn38Pb1 / 2.0372 |
| ISO | CuZn38Pb1 |
CW607N (CuZn38Pb1) is a free-cutting leaded brass per EN 12164 (UNS C37000). With about 1% lead it machines cleanly and suits general turned parts, fittings, fasteners and connectors across mechanical and electrical engineering.
Yes, under RoHS Annex III Exemption 6(c) (lead up to 4% in copper alloys), currently valid to 30 June 2027. For mandatory lead-free applications specify CW724R or C6802 instead.
CW602N (CuZn36Pb2As) is an arsenical, DZR-qualified grade (ISO 6509-1) for aggressive potable water. CW607N (CuZn38Pb1) is a different alloy — a standard free-cutting brass, not DZR. If the drawing or water authority demands certified DZR, use CW602N or C35330.
The nearest US grade is free-cutting brass C37000; the former UK designation is CZ129. Composition is specified in EN 12164; Brassland supplies EN 10204 Type 3.1 mill certificates with every lot.
Balanced machinability and corrosion behaviour, to your drawing. ISO 9001:2015. Quote within 24 hours.
Request a QuoteComposition ranges, mechanical properties, machinability ratings and regulatory data on this page are cross-referenced against the publishers below. Tolerances and minimum values are taken from the relevant published standard at the time of writing — for procurement specification, always reference the current published edition.
Last reviewed: June 2026. EN/ISO/ASTM standards are updated periodically. This datasheet reflects the editions listed; for safety-critical or contract-critical applications, always verify against the current published edition of the standard. For project-specific deviations or supplier-specific composition windows, request a Type 3.1 mill certificate (EN 10204) with your order.