CZ109

CZ109 is a lead-free brass alloy, often identified as CW509L or UNS C28000, containing approximately 59-62% copper with zinc making up the balance. It is known for being a cost-effective, corrosion-resistant, and machinable material suitable for general engineering purposes.

Chemical Composition

• Copper (Cu): 59.0% – 62.0%

• Zinc (Zn): Remainder

• Lead (Pb): Up to 0.10%

• Total other elements, including iron, nickel, etc.: Up to 0.30%

Mechanical Properties

• Tensile Strength: Around 340 MPa

• Proof Stress: Minimum 25 MPa (varies based on temper and form)

• Elongation: Moderate ductility depending on temper and processing

Key Features

• Excellent hot formability and high ductility

• Corrosion-resistant, especially in marine and chemical environments

• Suitable for manufacturing condenser and heat exchanger tubeplates

• Used in decorative architectural elements, extruded sections, hot-stamped components, and limited cold bending applications

Applications

• Offshore and marine hardware

• Chemical processing equipment

• Decorative and architectural extruded sections

• Heat exchanger and condenser tubeplates