C34500

C34500 is a high leaded brass alloy known for its excellent machinability, good mechanical properties, and corrosion resistance. It is often used in applications requiring extensive machining and moderate strength, such as automotive parts, plumbing fittings, and industrial components.

Chemical Composition

• Copper (Cu): 62.0 – 65.0%

• Lead (Pb): 1.5 – 2.5%

• Zinc (Zn): 32.0 – 36.5%

• Iron (Fe): Up to 0.15%

• Other residuals: Up to 0.4%

Mechanical Properties

• Tensile Strength: 340 – 430 MPa

• Yield Strength: 120 – 180 MPa

• Elongation: 7 – 28% (depending on temper)

• Hardness (Rockwell B): 50 – 80

Physical Properties

• Density: 8.47 g/cm³

• Melting Range: Solidus ~1630°F (887°C), Liquidus ~1700°F (927°C)

• Electrical Conductivity: 26% IACS

• Thermal Conductivity: 67 BTU/(ft²·hr·°F)

• Coefficient of Thermal Expansion: 11.3 × 10⁻⁶ /°F

• Specific Heat Capacity: 0.09 BTU/lb/°F

Fabrication and Applications

• Excellent machinability with a machinability rating of 90%

• Good formability and moderate strength

• Suitable for soldering and brazing; welding is not generally recommended

• Commonly used in automotive parts, plumbing fittings, fasteners, and other machined components