Copper alloys
CW602N
CuZn36Pb2As · DZR brass
Arsenic-inhibited brass resistant to dezincification. Used instead of CW617N for fittings in aggressive mains water and hot water installations.
- Rp0.2 · MPa
- —
- Rm · MPa
- —
- TEMPERATURE
- −10 … +110 °C
- COST
Chemical composition
The values in this section are being verified.
Mechanical properties
The values in this section are being verified.
Service temperature
−10 °C+110 °C−200−1000100200300400500600700800
110–120 °C for DZR brass valves.
This is the limit of the material itself. A valve's service temperature is usually set by the seal and seat materials; product pages give it for each seal option.
Physical properties and heat treatment
- HEAT TREATMENT
- After forging, a 2-hour heat treatment at 500–550 °C is needed for dezincification resistance (Diehl).
Media suitability GENERAL TREND
Fresh water
Seawater
Steam
Hydrocarbons, oil
Dilute acid
Caustic
Air, gas
Low temperature
Emsal assessment. The final choice is made from corrosion tables, taking concentration, temperature, chloride content and flow velocity into account.
Strengths and weaknesses
Strengths
- Dezincification resistant (DZR)
- Good machinability
Weaknesses
- Heat treatment after forging is essential, otherwise the DZR property is lost
- More expensive than CW617N, lower forgeability
Manufacturing and use
- ECONOMY
- Medium.
- MANUFACTURING METHODS
- Hot forging + heat treatment · Turning from bar
- TYPICAL VALVE PARTS
- Body (plumbing) · Stem · Union
Source: EN 12164 / EN 12165. Values compiled and verified by Emsal Vana; for binding values, refer to the current edition of the standard and the material certificate.