C23400

C23400 is a red brass alloy also known as CuZn15, CW502L, or 85/15 brass due to its composition of approximately 85% copper and 15% zinc. It is distinguished by its excellent corrosion resistance, moderate strength, and good machinability.

Chemical Composition

• Copper (Cu): 81.0% – 84.0%

• Zinc (Zn): 15.7% – 19%

• Lead (Pb): Up to 0.05%

• Iron (Fe): Up to 0.05%

• Other impurities: Up to 0.20%

Mechanical Properties (Typical for Half-Hard Temper H02)

• Tensile Strength (UTS): 370 – 640 MPa

• Elongation: Around 16% or higher, depending on temper

• Rockwell B Hardness: 52 to 91

• Modulus of Elasticity: Approximately 110 GPa (16 million psi)

Physical and Thermal Properties

• Density: About 8.5 g/cm³

• Melting Range: Solidus at 930°C, Liquidus at 970°C

• Electrical Conductivity: Around 31% IACS

• Thermal Conductivity: Approx. 120 W/m·K

• Thermal Expansion Coefficient: About 19 µm/m-K

Fabrication and Uses

• Excellent machinability rating of about 30%

• Good resistance to dezincification and stress corrosion cracking

• Commonly used for plumbing fixtures, valves, fasteners, marine fittings, and architectural hardware

• Suitable for soldering, brazing, oxyacetylene welding; not recommended for coated metal arc welding

• Excellent cold forming and moderate hot forming capabilities