CW614N

CW614N is an alpha/beta phase brass with excellent free-cutting properties and superb machinability, rated 100% on the machinability scale for copper alloys. It is used for making high-speed machined components like bolts, screws, nuts, gears, electrical conductor parts, valve details, fittings, profiles, window frames, door sills, and lock components. This alloy exhibits good corrosion resistance but is not resistant to dezincification. Cold working capability is poor, but hot workability is excellent, typically done between 630 and 730°C. It can be soldered excellently, brazed well, but welding is not generally recommended or limited to butt welding.

Chemical Composition

• Copper (Cu): 57.00% – 59.00%

• Lead (Pb): 2.50% – 3.50%

• Iron (Fe): Up to 0.30%

• Tin (Sn): Up to 0.30%

• Nickel (Ni): Up to 0.30%

• Aluminium (Al): Up to 0.05%

• Total Others: Up to 0.20%

• Zinc (Zn): Remainder

Mechanical and Physical Properties (Typical)

• Tensile Strength: ≥ 410 MPa

• Yield Strength (0.2% offset): ~330 MPa

• Elongation: ≥ 15%

• Brinell Hardness: ~120 HB

• Density: About 8.5 g/cm³

• Melting Point: Around 875 – 890 °C

• Electrical Conductivity: ~28% IACS

• Thermal Conductivity: 120 W/m·K

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

• Modulus of Elasticity: About 110 GPa