CW602N

CW602N is a dezincification-resistant (DZR) brass alloy classified as CW602N or CZ132 with lead and arsenic additions. It is primarily used for plumbing fittings, valves, and components where high corrosion resistance, especially against dezincification, is required. CW602N offers excellent machinability, good ductility, and strong corrosion resistance.

Chemical Composition

• Copper (Cu): 61.0 – 63.0%

• Lead (Pb): 1.7 – 2.8%

• Arsenic (As): 0.02 – 0.15%

• Zinc (Zn): 35.0 – 37.0%

• Tin (Sn): Up to 0.1%

• Iron (Fe): Up to 0.1%

• Nickel (Ni): Up to 0.3%

• Aluminium (Al): Up to 0.05%

• Manganese (Mn): Up to 0.1%

• Total other impurities: Up to 0.2%

Mechanical Properties (Specimen Diameter 18-40 mm)

• Tensile Strength: Min 350 MPa

• Proof Strength: Min 150 MPa

• Elongation: Min 22%

Physical Properties

• Density: 8.43 g/cm³

• Melting Range: Solidus 1645°F (910°C), Liquidus 1660°F (910°C)

• Thermal Conductivity: 117 W/m°C

• Electrical Conductivity: 26% IACS

• Thermal Expansion Coefficient: 20.7 x 10⁻⁶ /°C

• Specific Heat: 377 J/kg°C

Fabrication and Applications

• Excellent hot formability, good cold formability

• Good machinability (75% relative to free cutting brass)

• Excellent soldering and good brazing

• Welding not recommended (oxyacetylene, arc, resistance)

• Typical uses: Water fittings, valves, taps, and fluid handling systems requiring dezincification resistance