Weight %. Slightly lower Zn than CW617N shifts the balance toward ductility while Pb keeps machining economical.
| Element | Symbol | Min % | Max % |
|---|---|---|---|
| Copper | Cu | 60.0 | 61.0 |
| Zinc | Zn | Balance | |
| Lead | Pb | 1.6 | 2.5 |
| Iron | Fe | — | 0.20 |
| Nickel | Ni | — | 0.30 |
Bars show the range from the table: bar length at mid-range, zinc as the remainder.
EN 12164 condition values (minimum values). Condition names give the minimum tensile strength; hardness conditions (H…) are an alternative way to order. The EN 10204 3.1 certificate reports the values of the supplied bar. Physical properties are typical values; a range shows the spread of published data (references: Kupferverband/DKI data sheet; Copper Development Association, UNS equivalent C37700).
| Property | Condition | Value | Unit |
|---|---|---|---|
| Condition M | as manufactured | no limits | — |
| Tensile / Elongation | R360, Ø6–80 mm | ≥360 / ≥20 | MPa / % |
| Tensile / 0.2 % Proof / Elongation | R410, Ø2–40 mm | ≥410 / ≥230 / ≥12 | MPa / MPa / % |
| Tensile / 0.2 % Proof / Elongation | R500, Ø2–14 mm | ≥500 / ≥350 / ≥8 | MPa / MPa / % |
| Hardness | hardness conditions H070 / H100 / H120 | 70–100 / 100–145 / ≥120 | HB |
| Density | at 20 °C | 8.44 | g/cm³ |
| Melting Range | solidus–liquidus | 880–900 | °C |
| Thermal Conductivity | at 20 °C | 109–119 | W/(m·K) |
| Electrical Conductivity | at 20 °C | 24–27 | %IACS |
| Thermal Expansion | 20–300 °C | 20.4–21.0 | ×10⁻⁶/K |
| Modulus of Elasticity | at 20 °C | 102–103 | GPa |
| Machinability | CDA rating of its UNS equivalent C37700 (C36000 = 100); Kupferverband/DKI index 90 | 80 | index |
| Standard | Designation |
|---|---|
| EN (Europe) | CW608N / CuZn38Pb2 |
| BS (UK legacy) | CZ120 |
| DIN (Germany) | CuZn38Pb2 |
| ISO | CuZn38Pb2 |
| UNS / ASTM (USA) | C37700 — equivalent (CW608N lies inside its limits) |
CW608N (CuZn38Pb2, equivalent to 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, equivalent to US C37700) is the general-purpose free-cutting and hot-stamping grade, used for machined and forged fittings and valve components.
The UNS equivalent is C37700 forging brass (ASTM B283 / B124), whose limits contain CW608N’s copper and lead ranges; the former UK designation is CZ120. 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: September 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.
Brassland machines CW608N into brass turned parts and CNC machined components to your drawing in Jamnagar, India, including precision turned brass components on 28+ Swiss-type lathes, with an EN 10204 3.1 certificate on every shipment.