CZ133

CZ133 is a naval brass alloy known for its excellent combination of strength, corrosion resistance, and property retention at elevated temperatures, making it ideal for marine applications. It is an alpha-beta brass with about 39% zinc, 1% tin, and copper making up the balance.

Chemical Composition

• Copper (Cu): 61.00 – 63.00%

• Lead (Pb): 1.70 – 2.80%

• Aluminium (Al): 0 – 0.05%

• Iron (Fe): 0 – 0.10%

• Nickel (Ni): 0 – 0.30%

• Tin (Sn): Approx. 1%

• Zinc (Zn): Balance

• Total others: 0 – 0.20%

Mechanical Properties

• Tensile Strength: 340 – 480 MPa

• Proof Stress: 200 – 350 MPa

• Elongation: 8 – 20%

• Hardness: Up to 140 HB

Physical Properties

• Density: 8.50 g/cm³

• Melting Point: ~885°C

• Modulus of Elasticity: 105 GPa

• Electrical Resistivity: 0.66 x 10⁻⁶ Ω·m

• Thermal Conductivity: 115 W/m·K

Fabrication and Applications

• Good machinability (rating 90 vs standard free-machining brass at 100)

• Fair cold working, poor hot forming

• Excellent soldering, good brazing, fair butt welding

• Applications include riveted and machined components in marine and industrial environments