C46500

C46500, also known as Arsenical Naval Brass, is a copper alloy with high ductility, electrical and thermal conductivity, impact strength, and good corrosion resistance. It contains copper, zinc, tin, arsenic, and small amounts of lead and iron. This alloy is commonly used in marine applications and other environments where corrosion resistance combined with good mechanical properties is critical.

Chemical Composition

• Copper (Cu): 59.00 – 62.00%

• Tin (Sn): 0.50 – 1.00%

• Arsenic (As): 0.02 – 0.10%

• Lead (Pb): Up to 0.20%

• Iron (Fe): Up to 0.10%

• Zinc (Zn): Balance

Mechanical Properties (Typical for temper 1/4 Hard)

• Tensile Strength (UTS): Around 415 MPa for smaller diameters, decreasing to 270 MPa for larger sizes

• Proof Stress: Around 170 – 185 MPa

• Elongation: 22 – 25%

• Hardness: 55 – 95 HRB

Physical Properties

• Melting Point: Solidus ~1630°F (887°C), Liquidus ~1650°F (899°C)

• Density: About 8.41 g/cm³

• Electrical Conductivity: Approximately 26% IACS

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

• Coefficient of Thermal Expansion: 11.8 x 10⁻⁶ per °F

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

• Modulus of Elasticity: 15,000 ksi

Fabrication and Applications

• Excellent soldering and brazing properties

• Good weldability with some limitations

• Fair cold workability, excellent hot workability (forgeability rating 90)

• Commonly used in marine hardware, fasteners, plumbing, and industrial components