C37100

C37100 is a widely used leaded brass alloy, mainly composed of copper and zinc with added lead for improved machinability. It belongs to the class of alpha-beta brass alloys and is well-suited for applications requiring good strength, corrosion resistance, and excellent machinability.

Chemical Composition

• Copper (Cu): 59.0 – 63.0%

• Zinc (Zn): Balance

• Lead (Pb): Approximately 1.5 – 2.5%

• Iron (Fe) and other minor elements: Trace amounts up to about 0.3%

Mechanical Properties

• Tensile Strength: Approximately 370 – 520 MPa depending on temper and form

• Yield Strength: 150 – 390 MPa

• Elongation: 8 – 40% (depending on temper)

• Hardness: Varies with treatment

Physical Properties

• Density: Approximately 8.4 g/cm³

• Melting Range: Around 890 – 900°C (Solidus to Liquidus)

• Electrical Conductivity: About 27% IACS

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

• Thermal Expansion Coefficient: Approx. 11.6 × 10⁻⁶ /°F

• Specific Heat Capacity: 0.09 BTU/lb/°F

• Modulus of Elasticity: Around 100 GPa

Fabrication and Applications

• Excellent machinability due to lead content

• Good corrosion resistance suitable for general engineering and decorative uses

• Widely used in building hardware, consumer products, electrical fittings, and industrial components

• Not typically recommended for welding applications