CZ108

CZ108, also known as CW508L, is a high-purity yellow brass alloy with approximately 62-64% copper and 37% zinc. It is primarily used where excellent hot and cold forming properties are required, especially in sheet and plate forms.

Chemical Composition

• Copper (Cu): 62.0% – 64.0%

• Zinc (Zn): Balance (approximately 36-38%)

• Lead (Pb): Up to 0.30%

• Iron (Fe), Nickel (Ni), Tin (Sn), and Aluminium (Al) are present in minor amounts

• Other impurities: Up to 0.20%

Mechanical Properties

• Proof Stress: 110 - 500 MPa (varies by temper and thickness)

• Tensile Strength: 300 - 550 MPa

• Elongation: 3 - 38% (depending on temper)

• Hardness (Vickers): 55 - 180 HV

Physical Properties

• Density: 8.44 g/cm³

• Melting Point: Around 916 °C

• Thermal Conductivity: 116 W/m·K

• Coefficient of Thermal Expansion: 20.5 x 10⁻⁶ /K

• Electrical Conductivity: Approx. 27.6% IACS

Fabrication and Machinability

• Excellent cold working and drawing capabilities, suitable for tubes and sheets

• Fair capacity for hot working

• Excellent soldering and brazing ability

• Good weldability with oxyacetylene and spot welding; fair for gas shielded arc welding

• Machinability: Moderate, best at slow speeds and light feeds

• Not suitable for seam welding and coated metal arc welding

Typical Applications

• Heat exchangers, radiator parts

• Decorative sheet and plate components

• Electrical and scientific apparatus

• Plumbing and HVAC tubing