CW507L

CW507L is a high zinc content yellow brass alloy, also known by designations C27000 and CuZn36, widely used for cold forming and engineering purposes.

Chemical Composition

• Copper (Cu): 63.5% - 65.5%

• Zinc (Zn): Balance (about 34.5% - 36.5%)

• Lead (Pb): Up to 0.05%

• Iron (Fe): Up to 0.05%

• Nickel (Ni): Up to 0.30%

• Tin (Sn): Up to 0.10%

• Aluminium (Al): Up to 0.02%

• Other impurities: Typically under 0.10%

Mechanical Properties

• Tensile Strength: 350 - 440 MPa (varies by temper)

• Proof Stress: Minimum 170 MPa

• Elongation: Minimum 28%

• Hardness (HRB): Typically 30 - 90 depending on form and temper

Physical Properties

• Density: 8.47 g/cm³

• Melting Range: 1660°F (solidus) to 1710°F (liquidus)

• Thermal Conductivity: 67 BTU/sq ft/ft/hr/°F (approx. 116 W/m·K)

• Electrical Conductivity: 27% IACS

• Coefficient of Thermal Expansion: 11.3 x 10⁻⁶ /°F

Fabrication and Machinability

• Excellent cold working capacity (drawing, forming, bending, shearing)

• Poor hot forming ability

• Good corrosion resistance

• Excellent soldering and brazing capability

• Fair oxyacetylene and gas shielded arc welding; not suitable for coated metal arc welding

• Machinability rating: Around 30%

• Good mechanical strength and ductility

Typical Applications

• Architectural and decorative hardware

• Plumbing and electrical fittings

• Fasteners, springs, and washers

• Heat exchanger components and tubes

• General engineering and machinery parts