C69710

C69710 is a leaded silicon brass alloy known for its moderately low melting point and relatively high tensile strength compared to other wrought brass alloys.

Chemical Composition

• Copper (Cu): 75-79%

• Zinc (Zn): ~16-22%

• Silicon (Si): 2-3%

• Lead (Pb): Up to 1%

• Arsenic (As): Present in small amounts for corrosion resistance

• Iron (Fe): Small amounts

Mechanical Properties (Typical, ASTM B371, Temper H02)

• Tensile Strength: Approximately 400 – 570 MPa

• Yield Strength: Around 230 – 350 MPa

• Elongation: Around 10 – 30% depending on temper

• Hardness: Varies with temper, generally moderate

Physical Properties

• Density: Approximately 8.3 g/cm³

• Melting Point: Lower than typical brasses due to lead and silicon content

• Electrical Conductivity: About 8% IACS

• Thermal Conductivity: Lower than pure copper due to alloying

Fabrication and Use

• Excellent machinability due to lead content

• Good strength and corrosion resistance from silicon and arsenic

• Used widely in valve parts, fittings, and components required to resist corrosion and wear

• Suitable for machining, soldering, and brazing; limited welding