Weight %. The arsenic addition (0.02–0.25%) inhibits dezincification in the alpha phase; correct heat treatment completes DZR qualification per ISO 6509-1.
| Element | Symbol | Min % | Max % | Typical % |
|---|---|---|---|---|
| Copper | Cu | 59.5 | 64.0 | 61.5 |
| Zinc | Zn | Balance | ~35 | |
| Lead | Pb | 1.5 | 3.5 | 2.0 |
| Arsenic | As | 0.02 | 0.25 | 0.10 |
| Property | Condition | Value | Unit |
|---|---|---|---|
| Tensile Strength | by temper | 380–470 | MPa |
| Yield Strength | typical, half-hard | ≥150 | MPa |
| Elongation | typical | ≥20 | % |
| Hardness | typical | 90–110 | HB |
| Machinability | vs C36000 = 100 | ~62% | — |
| Density | — | 8.47 | g/cm³ |
| Melting Range | solidus–liquidus | ~885–900 | °C |
| Standard | Designation |
|---|---|
| UNS / ASTM (USA) | C35330 — ASTM B453 |
| EN — equivalent | CW602N / CuZn36Pb2As |
| BS (UK legacy) | CZ132 |
| DZR test method | ISO 6509-1 (CuCl₂) |
| Trade name | DZR Brass / DR Brass |
C35330 is an arsenical, leaded DZR (dezincification-resistant) brass per ASTM B453 — 59.5–64% copper, 1.5–3.5% lead for machinability, and 0.02–0.25% arsenic to suppress dezincification. It is the UNS designation for the same metallurgy as CW602N (CZ132), the standard grade for water-fitting components.
The EN equivalent is CW602N (CuZn36Pb2As); the legacy British designation is CZ132. The same bar stock typically certifies to either designation — we confirm the certificate wording at quotation.
Small arsenic additions (0.02–0.25%) inhibit the selective leaching of zinc from the alpha phase in chlorinated or high-chloride waters. Combined with the correct heat treatment, the alloy passes the ISO 6509-1 CuCl₂ dezincification test. Specify the qualification on your drawing — chemistry alone does not guarantee DZR.
Its DZR behaviour is designed for water contact, but it is a leaded grade — fine where local rules permit leaded DZR brass (much of the UK/EU/AU market), not for US wetted parts under NSF/ANSI 372. End-product approval is the product maker's responsibility; for lead-free DZR specify C69300 or CW724R.
Arsenical DZR brass components, 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.