6912 FLB

6912 FLB is an extruded leaded alpha/beta brass alloy with a small addition of aluminium, which gives it a bright golden colour. It is primarily used in builders' hardware and comes in the form of extruded rods and flats. The lead content provides free cutting characteristics, while the aluminium addition enhances its formability and surface appearance.

Chemical Composition

• Copper (Cu): 56.50 – 60.00%

• Lead (Pb): 0.60 – 2.00%

• Iron (Fe): Up to 0.30%

• Total Other Impurities (excluding Fe): Up to 0.75%

• Zinc (Zn): Remainder (Balance)

Mechanical Properties

• Tensile Strength (UTS): Minimum 310 MPa

• Elongation: Minimum 25%

• Hardness: Not specifically stated, but typically moderate

Physical Properties

• Density: 8.40 g/cm³

• Coefficient of Thermal Expansion (CTE): 26.0 μm/m·°C (14.4 μin/in·°F)

• Specific Heat Capacity: 0.380 J/g·°C (0.0908 BTU/lb·°F)

• Thermal Conductivity: 113 W/m·K (784 BTU·in/hr·ft²·°F)

• Melting Point: 880–900 °C (1620–1650 °F)

Fabrication Properties

• Machinability (relative to CuZn39Pb3): 95%

• Cold Workability: Poor

• Hot Workability: Excellent

Applications

• Builders' hardware, such as butts and hinges

• Components requiring good machinability and a bright finish

• Suitable for extrusion into various sections, including round, hex, square, and rectangular profiles