Weight %. Aluminium and arsenic inhibit dezincification; lower zinc supports DZR performance.
| Element | Symbol | Min % | Max % |
|---|---|---|---|
| Copper | Cu | 62.0 | 64.0 |
| Zinc | Zn | Balance | |
| Lead | Pb | 1.2 | 1.6 |
| Aluminium ✓ | Al | 0.5 | 0.7 |
| Arsenic ✓ | As | 0.02 | 0.15 |
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.
| 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 | 8.44 | g/cm³ |
| Melting Range | solidus–liquidus | 875–900 | °C |
| Thermal Conductivity | typical | 93 | W/(m·K) |
| Electrical Conductivity | typical (12.5 MS/m) | 21 | %IACS |
| Thermal Expansion | typical | 21.3 | ×10⁻⁶/K |
| Modulus of Elasticity | at 20 °C, annealed | 100 | GPa |
| Machinability | CuZn39Pb3 = 100 | 55 | index |
| Standard | Designation |
|---|---|
| EN (Europe) | CW625N / CuZn35Pb1.5AlAs |
| Type | Dezincification-resistant (arsenical) brass |
| DIN (Germany) | CuZn35Pb1.5AlAs |
| ISO | CuZn35Pb1.5AlAs |
| Related DZR grades | CW602N · C35330 |
CW625N (CuZn35Pb1.5AlAs) is a dezincification-resistant (DZR) leaded brass per EN 12164/12165 — aluminium and arsenic inhibit dezincification. It is used for water fittings and valve components where corrosion resistance matters; it is leaded, not lead-free.
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.
CW614N and CW617N are standard leaded machining/forging brasses. CW625N (CuZn35Pb1.5AlAs) is different — a dezincification-resistant (DZR) grade with aluminium and arsenic added to resist dezincification in water, trading some machining speed for corrosion resistance.
CW625N is a dezincification-resistant (arsenical) brass; the comparable DZR grades are CW602N (CuZn36Pb2As) and C35330. For lead-free service use CW724R or C69300 instead. 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 CW625N 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.