Weight %. The arsenic addition inhibits dezincification of the alpha phase; correct heat treatment completes DZR qualification.
| Element | Symbol | Min % | Max % |
|---|---|---|---|
| Copper | Cu | 61.0 | 63.0 |
| Zinc | Zn | Balance | |
| Lead | Pb | 1.7 | 2.8 |
| Arsenic ✓ | As | 0.02 | 0.15 |
| Iron | Fe | — | 0.10 |
Bars show the range from the table: bar length at mid-range, zinc as the remainder.
EN 12164 condition values (minimum values); older editions of the standard used R280 / R350 / R430. 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 C35330).
| Property | Condition | Value | Unit |
|---|---|---|---|
| Condition M | as manufactured | no limits | — |
| Tensile / Elongation | R280, Ø6–80 mm | ≥280 / ≥30 | MPa / % |
| Tensile / Elongation | R320, Ø6–60 mm | ≥320 / ≥20 | MPa / % |
| Tensile / Elongation | R400, Ø4–15 mm | ≥400 / ≥8 | MPa / % |
| Hardness | hardness conditions H070 / H090 / H105 | 70–110 / 90–135 / ≥105 | HB |
| Density | at 20 °C | 8.43–8.45 | g/cm³ |
| Melting Range | solidus–liquidus | 880–910 | °C |
| Thermal Conductivity | at 20 °C | 109–117 | W/(m·K) |
| Electrical Conductivity | at 20 °C | 24–26 | %IACS |
| Thermal Expansion | up to 300 °C | 20.0–20.7 | ×10⁻⁶/K |
| Modulus of Elasticity | at 20 °C | 103–106 | GPa |
| Machinability | CuZn39Pb3 = 100 (Kupferverband/DKI index 85) | 75–85 | index |
Typical density 8.43–8.45 g/cm³. Density is a typical physical value of the alloy, not a limit of EN 12164 or ASTM B453.
| 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 — soft or chloride-rich — waters. Resistance is verified by the ISO 6509-1 dezincification test, making it the established DZR grade for water-contact fittings.
Specify CW602N where the part is wetted by aggressive water and the market accepts a leaded DZR brass — valve internals, tap components, fitting bodies in soft-water regions. For drinking water in the EU (European positive list, applying from 31 December 2026), the USA and Australia, specify a lead-free grade such as CW724R. CW617N is fine for dry-side or non-wetted parts and is easier to machine (about 90 against 75–85 for CW602N, CuZn39Pb3 = 100).
Approval is granted to the finished product, never to the alloy: WRAS in the UK, Kiwa Water Mark in the Netherlands and DVGW in Germany assess the fitting, and the product maker holds the approval. In the EU, CW602N is not on the European positive list (Implementing Decision (EU) 2024/367, applying from 31 December 2026); compositions approved nationally between 13 July 2021 and 31 December 2026 may be used until 31 December 2032 if the product meets 5 µg/l lead at the tap. In electrical and electronic equipment its lead is covered by RoHS Exemption 6(c).
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.
Write the standard and designation together, for example “EN 12164 – CW602N / CuZn36Pb2As”. State the condition or a minimum property on the drawing when it matters; the table above gives the standard values. Tolerances follow ISO 2768-m unless the title block says otherwise.
The mill’s EN 10204 Type 3.1 inspection certificate for the alloy lot reports the measured chemical composition and mechanical test results. Brassland adds a Certificate of Conformity for the order and RoHS and REACH declarations at no charge; PPAP Level 1–3 packages are available for OEM qualification.
EN 12164 – CW602N / CuZn36Pb2As. The UNS equivalent is C35330 — ASTM B453.Primary source: Kupferverband (DKI) — CuZn36Pb2As data sheet.
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: 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 CW602N 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.