CW611N

CW611N is a low leaded naval brass alloy, also known as CZ129, that closely resembles muntz metal but contains finely dispersed lead particles. It offers excellent hot working properties, good cold formability, and machinability, making it suitable for hot forging, upsetting, and machining applications.

Chemical Composition

• Copper (Cu): 59.0 – 60.0%

• Lead (Pb): 0.80 – 1.60%

• Nickel (Ni): Up to 0.30%

• Iron (Fe): Up to 0.20%

• Aluminium (Al): Up to 0.05%

• Tin (Sn): Up to 0.20%

• Zinc (Zn): Balance

• Total Others: Up to 0.20%

Mechanical Properties (Temper R410)

• Tensile Strength (Rm): 360 – 550 MPa (depending on diameter)

• Yield Strength (Rp0.2): 150 – 450 MPa

• Elongation (A): 5 – 35%

• Hardness (HB): 110 – 150

Physical Properties

• Density: 8.41 g/cm³

• Melting Point: 920°C

• Electrical Conductivity: 26% IACS

• Thermal Conductivity: 121 W/m·K

• Thermal Expansion Coefficient (20-200°C): 20.9 x 10⁻⁶ /°C

• Specific Heat Capacity: 377 J/kg·K

• Young's Modulus: 97 GPa

Fabrication and Applications

• Excellent hot workability and good cold formability

• Good corrosion resistance

• Excellent soldering and good brazing

• Welding not recommended for oxy-acetylene or gas-shielded arc; resistance welding is not recommended for spot and seam

• Typical uses include architectural, decorative, and industrial components, including hot forging and machining parts