Brass reference / Leaded brass
CW602N DZR brass
A leaded brass with an arsenic addition and a controlled heat treatment, developed for European water fittings.
Also known as CZ132, DZR brass, Dezincification resistant brass. Published typical values for the alloy, never a promise from a shop.
Composition
| Element | Nominal weight % |
|---|---|
| Copper | 61.0 to 63.0 |
| Lead | 1.7 to 2.8 |
| Arsenic | 0.02 to 0.15 |
| Zinc | remainder |
Properties
- UNSNo direct UNS equivalent
- EN equivalentCuZn36Pb2As / CW602N
- Hardness60 to 80 HRB
- Density8.44 g/cm3
- Typical tolerance±0.02 mm typical
- Common formsRound and hex bar, hot stamping stock
What it is for, and what it is not
Specify it for
- Water fittings in markets where the lead limit allows a leaded alloy
- Hot water service needing dezincification resistance
- Hot stamped then machined fittings
- Parts specified to ISO 6509 with a depth limit
Do not specify it for
- US wetted potable water parts, the lead content is over the NSF/ANSI 372 limit
- Any part where lead-free is the requirement rather than corrosion resistance
What a buyer should know
This alloy answers corrosion, not the lead question. The arsenic addition plus a controlled heat treatment stabilises the structure against dezincification, and the alloy still machines and hot forges well. It is widely used for water fittings in the UK and Europe, and it does not meet the US 0.25 percent weighted average lead rule.
Nominal lead is 1.7 to 2.8 percent, which is above the 0.25 percent weighted average limit that NSF/ANSI 372 sets for wetted potable water surfaces. See NSF/ANSI 61 and 372 and RoHS exemption 6(c).
Closest alternatives
| Alloy | Lead % | Mach. | DZR | Why you might switch |
|---|---|---|---|---|
| C377 forging brassC37700 | 1.5 to 2.5 | 80 | Poor | Hot forged to a near net shape then machined only where a sealing face or thread requires it. |
| C69300 silicon brassC69300 | under 0.09 | 80 | High | The usual lead-free answer for potable water, roughly twice as strong as C360 and highly dezincification resistant. |
| Bismuth brassC49300 / C49350 | under 0.25 | 80 | Moderate | Bismuth replaces lead as the chip breaker, so it behaves closest to C360 on an existing C360 program. |
Need a shop that runs CW602N?
Send the drawing and we match it with up to 3 shops that turn brass. Free for buyers, reply within 24 business hours.