Weight %. Slightly lower Zn than CW617N shifts the balance toward ductility while Pb keeps machining economical.
| Element | Symbol | Min % | Max % | Typical % |
|---|---|---|---|---|
| Copper | Cu | 60.0 | 61.0 | 60.5 |
| Zinc | Zn | Balance | ~38 | |
| Lead | Pb | 1.6 | 2.5 | 2.0 |
| 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. | 230–350 | MPa |
| Elongation (A) | EN 12164, temper-dep. | 3–20 | % |
| Hardness | temper-dependent | 90–150 | HB |
| Machinability | free-cutting; confirm on cert | — | — |
| Density | 20 °C | 8.44 | g/cm³ |
| Thermal Conductivity | confirm on cert | — | W/(m·K) |
| Melting Range | confirm on cert | — | °C |
| Standard | Designation |
|---|---|
| EN (Europe) | CW608N / CuZn38Pb2 |
| BS (UK legacy) | CZ128 |
| DIN (Germany) | CuZn38Pb2 |
| ISO | CuZn38Pb2 |
| UNS / ASTM (USA) | C37700 (exact equivalent) |
CW608N (CuZn38Pb2, UNS C37700) is a free-cutting leaded brass per EN 12164/12165. It machines and hot-stamps cleanly and is widely used for fittings, valve components and general turned parts.
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 C69300 silicon brass.
All three are leaded machining brasses. CW614N (CuZn39Pb3) has the most lead and the best chip-breaking for pure bar turning; CW617N (CuZn40Pb2) is the hot-forging grade; CW608N (CuZn38Pb2, = US C37700) is the general-purpose free-cutting and hot-stamping grade, used for machined and forged fittings and valve components.
The nearest equivalents are C37700-family leaded brasses (US, ASTM) and former UK designation CZ128. Composition is specified in EN 12164; Brassland supplies EN 10204 Type 3.1 mill certificates with every lot.
Machining economy plus forming headroom, 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.