C46200

C46200, commonly known as Naval Brass, is a copper-zinc-tin alloy with added tin for improved strength, corrosion resistance, and property retention at cryogenic temperatures. It has excellent hot formability and is widely used in marine, industrial, and subsea applications requiring durability and corrosion resistance.

Chemical Composition

• Copper (Cu): 62.0 – 65.0%

• Zinc (Zn): Remainder (about 33.3 – 37.5%)

• Tin (Sn): 0.5 – 1.0%

• Lead (Pb): Up to 0.2%

• Iron (Fe): Up to 0.1%

• Other elements: Up to 0.4%

Mechanical Properties (ASTM B21, Temper HO2)

• Tensile Strength (UTS): 360 – 400 MPa (varies with diameter)

• Proof Stress: About 170 – 185 MPa

• Elongation: 22 – 27%

• Hardness: Not explicitly stated, but typically moderate to hard

Physical Properties

• Density: 8.41 g/cm³

• Melting Point: Solidus ~1630°F (888°C), Liquidus ~1650°F (899°C)

• Electrical Conductivity: 26% IACS at 68°F

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

• Thermal Expansion Coefficient: 11.8 × 10⁻⁶ /°F

• Modulus of Elasticity: 15,000 ksi

• Modulus of Rigidity: 5600 ksi

Fabrication and Uses

• Fair cold workability, excellent hot workability

• Excellent soldering and brazing ability; good oxyacetylene welding

• Machinability rating is about 30%

• Commonly used for fasteners, marine hardware, industrial components, and applications requiring strength, corrosion resistance, and good formability