Weight %. A standard free-cutting brass with ~1% lead for clean machining.
| Element | Symbol | Min % | Max % |
|---|---|---|---|
| Copper | Cu | 60.0 | 61.0 |
| Zinc | Zn | Balance | |
| Lead | Pb | 0.8 | 1.6 |
| 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 (reference: Copper Development Association, UNS equivalent C37000).
| 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 | 8.41–8.44 | g/cm³ |
| Melting Range | solidus–liquidus | 880–899 | °C |
| Thermal Conductivity | at 20 °C | 110–119 | W/(m·K) |
| Electrical Conductivity | at 20 °C | 24–27 | %IACS |
| Thermal Expansion | 20–300 °C | 20.4–20.9 | ×10⁻⁶/K |
| Modulus of Elasticity | at 20 °C | 103 | GPa |
| Machinability | CDA rating of its UNS equivalent C37000 (C36000 = 100) | 70 | index |
| Standard | Designation |
|---|---|
| EN (Europe) | CW607N / CuZn38Pb1 |
| UNS / ASTM (USA) | C37000 |
| BS (UK legacy) | none listed (CZ129 is CW611N) |
| DIN (Germany) | CuZn38Pb1 |
| 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 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; no old British designation is listed for CW607N (CZ129 corresponds to CW611N). 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: 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 CW607N 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.