C35350

C35350 is a high-leaded brass alloy known for excellent machinability combined with good corrosion resistance and mechanical strength. It is widely used for making precision-machined parts, decorative components, and marine hardware.

Chemical Composition

• Copper (Cu): 61.0 – 63.0%

• Lead (Pb): 2.0 – 4.5%

• Tin (Sn): 0.05 – 0.6%

• Zinc (Zn): Balance (usually around 35 – 37%)

• Iron (Fe): Up to 0.4%

• Phosphorus (P): Up to 0.2%

• Nickel (Ni): Up to 0.3%

Mechanical Properties

• Tensile Strength: Around 440 – 500 MPa depending on temper

• Yield Strength: Usually about 200 – 380 MPa

• Elongation: Typically 10 – 30%

• Hardness: Vickers hardness about 140 (typical)

• Fatigue Strength: ~25 ksi

Physical Properties

• Density: 8.4 g/cm³ (0.301 lb/cu in)

• Melting Point: Solidus 1578°F (857°C), Liquidus 1654°F (900°C)

• Electrical Conductivity: About 23% IACS

• Thermal Conductivity: 61 BTU/(ft²·hr·°F)

• Coefficient of Thermal Expansion: 12.2 × 10⁻⁶ per °F

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

• Modulus of Elasticity: 16,000 ksi

• Modulus of Rigidity: 4,560 ksi

Fabrication and Applications

• Poor cold workability and poor hot workability (forgeability)

• Excellent soldering and good brazing

• Welding not recommended

• Machinability rating about 88% (relative to free cutting brass)

• Typical applications include precision machine parts, marine hardware, gears, rivets, and decorative hardware