C37000

C37000, also known as Muntz Metal or CW607N, is a low lead forging brass alloy with good machinability, strength, and corrosion resistance. It is a type of alpha-beta brass with lead content added to enhance cutting and machining characteristics while maintaining excellent forging properties.

Chemical Composition

• Copper (Cu): 59.0 – 62.0%

• Lead (Pb): 0.8 – 1.5%

• Iron (Fe): Max 0.15%

• Zinc (Zn): Balance (remainder)

Mechanical Properties

• Tensile Strength: Typically around 310 to 355 MPa

• Yield Strength: Approximately 140 to 200 MPa

• Elongation: Around 20 to 40%

• Hardness: Rockwell B scale, approximately 45 to 75

Physical Properties

• Density: Approximately 8.41 g/cm³

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

• Thermal Conductivity: Around 69 BTU/(ft²·hr·°F)

• Melting Point: Liquidus approximately 1650°F (900°C), Solidus approximately 1630°F (885°C)

• Coefficient of Thermal Expansion: About 11.6 x 10⁻⁶ per °F

Fabrication and Uses

• Good forgeability with excellent hot working properties

• Suitable for soldering and brazing; welding generally not recommended

• Machinability rating is about 70% compared to free machining brasses

• Commonly used for automatic screw machine parts, mechanical components, plumbing fixtures, and industrial hardware