Weight %. The arsenic addition inhibits dezincification of the alpha phase; correct heat treatment completes DZR qualification.
| Element | Symbol | Min % | Max % | Typical % |
|---|---|---|---|---|
| Copper | Cu | 61.0 | 63.0 | 62.0 |
| Zinc | Zn | Balance | ~35.5 | |
| Lead | Pb | 1.5 | 2.5 | 2.0 |
| Arsenic ✓ | As | 0.02 | 0.15 | 0.06 |
| Iron | Fe | — | 0.30 | 0.08 |
| Property | Condition | Value | Unit |
|---|---|---|---|
| Tensile Strength (Rm) | R360 | 360–470 | MPa |
| Proof Stress (Rp0.2) | R360 | ≥140 | MPa |
| Elongation (A) | R360 | ≥20 | % |
| Hardness | R360 typical | 90–115 | HB |
| Machinability | vs C36000 = 100 | ~62% | — |
| Density | — | 8.52 | g/cm³ |
| Thermal Conductivity | — | ~130 | W/(m·K) |
| Melting Range | solidus–liquidus | 900–930 | °C |
| Standard | Designation |
|---|---|
| EN (Europe) | CW602N / CuZn36Pb2As |
| UNS / ASTM (USA) | C35330 — ASTM B453 |
| BS (UK legacy) | CZ132 |
| DIN (Germany) | CuZn36Pb2As |
| DZR test method | ISO 6509-1 (CuCl₂) |
CW602N (CuZn36Pb2As) contains a small arsenic addition (typically 0.02–0.15%) that inhibits the selective leaching of zinc in aggressive, chlorinated or soft waters. Resistance is verified by the ISO 6509-1 dezincification test, making it the established DZR grade for water-contact fittings.
Specify CW602N whenever the part is wetted by potable or aggressive water — valve internals, tap components, fitting bodies in soft-water regions. CW617N is fine for dry-side or non-wetted parts and is easier to machine (CW602N rates about 62% machinability).
CW602N is an accepted DZR material under schemes such as WRAS (UK), ACS (France) and KIWA (Netherlands), and is RoHS-compliant under Exemption 6(c). Note that approval applies to the finished product, not the raw alloy — the fitting itself must be tested and listed by the certifying body.
The closest equivalents are C35330 arsenical brass (US, ASTM) and CZ132 (former UK BS designation). Composition is specified in EN 12164; Brassland supplies EN 10204 Type 3.1 mill certificates and can arrange ISO 6509-1 test evidence per lot on request.
The established DZR grade, ISO 6509-1 qualified, made 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.