C33500

C33500 is a low-leaded brass alloy designed for good machinability, moderate strength, and effective corrosion resistance, making it well-suited for hardware, watch backs, and other precision components.

Chemical Composition

• Copper (Cu): 62.0 – 65.0%

• Zinc (Zn): 33.8 – 37.8%

• Lead (Pb): 0.25 – 0.70%

• Iron (Fe): Up to 0.10%

• Other impurities: Up to 0.4%

Mechanical Properties

• Tensile Strength: 390 – 420 MPa (varies by temper)

• Yield Strength: ~345 MPa

• Elongation: 7 – 43% (depends on temper, higher for softer forms)

• Hardness: Rockwell B 55–80

Physical Properties

• Density: 8.47 g/cm³

• Melting Point: 1650–1700°F

• 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

• Good for soldering and brazing, fair for most welding

• Good cold workability, poor hot workability

• Machinability rating: 60 (relative to free-cutting brass)

• Used in hardware, watch backs, screw machine products, and components where formability and corrosion resistance are required