C27450

C27450 is a lead-free yellow brass alloy also known as CuZn37 or CW508L. It has a copper content of about 62-65% and is widely used for its good combination of strength, corrosion resistance, and cold-forming ability.

Chemical Composition

• Copper (Cu): 60.0% - 65.0%

• Zinc (Zn): Balance (~35-40%)

• Lead (Pb): Maximum 0.25%

• Iron (Fe): Maximum 0.35%

• Other elements (Phosphorus, etc.): Maximum 0.5%

Mechanical Properties

• Tensile Strength: Typically around 390 MPa (varies with temper)

• Yield Strength: Around 370 MPa (varies with temper)

• Elongation: Varies by temper, typically good ductility

• Hardness (HRB): Around 68 (typical for rod temper H04)

Physical and Fabrication Properties

• Density: 8.44 g/cm³

• Electrical Conductivity: Approximately 27% IACS at 68°F

• Melting Point: Approx. 1680°F (910°C)

• Excellent for cold forming processes such as deep drawing, bending, and spinning

• Good machinability (though less than leaded brasses)

• High corrosion resistance, especially for plumbing and hardware applications

• Suitable for brazing, soldering, and welding in some cases

Common Applications

• Hardware components, machinery parts, and valves

• Bathroom and plumbing fixtures

• Electrical and electronic components

• Deep drawn and bent parts such as washers, rivets, screws, and springs