C27451

C27451 is a lead-free yellow brass alloy known for its suitability in applications requiring high corrosion resistance, especially for potable water uses.

Chemical Composition (Typical per ASTM B124)

• Copper (Cu): 61.0% - 65.0%

• Lead (Pb): Max 0.25%

• Iron (Fe): Max 0.35%

• Phosphorus (P): 0.05% - 0.20%

• Zinc (Zn): Balance

• Other elements: Up to 0.50%

Mechanical Properties

• Tensile Strength: Around 55 ksi (approx. 380 MPa)

• Yield Strength (~0.5% offset): Around 35 ksi (approx. 240 MPa)

• Elongation: Approximately 25%

• Rockwell Hardness (B scale): 55 - 75

Physical Properties

• Density: 8.44 g/cm³

• Electrical Conductivity: About 22.8% IACS at 68°F

• Thermal Conductivity: Approximately 67 Btu/sq ft/ft/hr/°F (116 W/m·K)

• Melting Range: Solidus ~1650°F, Liquidus ~1680°F

• Coefficient of Thermal Expansion: Approx. 11.4 x 10⁻⁶ /°F

Fabrication and Properties

• Excellent soldering and brazing

• Good resistance to dezincification, making it suitable for drinking water systems

• Suitable for forging, machining, and forming processes where moderate strength is sufficient

• Lead-free, eco-friendly alternative for applications demanding compliance with regulations on lead content

Typical Uses

• Plumbing fixtures and drinking water supply fittings

• Valves and pump parts that contact potable water

• Architectural and decorative hardware in corrosive environments