CW510L

CW510L is a lead-free yellow brass alloy with approximately 57-59% copper and around 42% zinc. It is also known as CuZn42 and is recognised for excellent machinability and good corrosion resistance, making it suitable for plumbing and potable water applications.

Chemical Composition

• Copper (Cu): 57.00% – 59.00%

• Zinc (Zn): Balance (~41-43%)

• Lead (Pb): Up to 0.20%

• Iron (Fe): Up to 0.30%

• Tin (Sn): Up to 0.30%

• Nickel (Ni): Up to 0.30%

• Aluminium (Al): Up to 0.05%

• Other elements (total impurities): Up to 0.20%

Mechanical Properties (Temper 430)

• Ultimate Tensile Strength (UTS): Minimum 430 MPa

• Proof Stress (PS): Minimum 220 MPa

• Elongation: Minimum 10%

• Hardness: About 35 HRB (varies)

Physical Properties

• Electrical Conductivity: 31% IACS

• Thermal Conductivity: 139 W/m·K

• Thermal Expansion Coefficient: 

• 21.7×10−6/K

• 21.7×10

• −6

• /K

• Density: 8.41 g/cm³

• Modulus of Elasticity: 107 GPa

Fabrication and Machinability

• Machinability rating: Approximately 60% relative to free-cutting brass CuZn39Pb3

• Excellent hot working capacity; poor capacity for cold working

• Suitable for soldering, brazing, gas welding, and resistance welding

• Melting range: 870-900 °C

• Soft annealing recommended at 450-550 °C

Typical Applications

• Lead-free components for plumbing and potable water systems

• Electrical fittings and parts

• Hot stamping and machining applications

• General purpose engineering parts requiring corrosion resistance and moderate strength