CW601N

CW601N is a high-leaded brass alloy, also known as C34200, characterised by excellent machinability and good mechanical properties. It is widely used for making precision machined parts, fasteners, and components requiring moderate strength and corrosion resistance.

Chemical Composition

• Copper (Cu): 62.0 – 65.0%

• Lead (Pb): 1.5 – 2.5%

• Zinc (Zn): 32.0 – 36.5%

• Iron (Fe): Up to 0.15%

• Other impurities: Up to 0.4%

Mechanical Properties

• Tensile Strength: 338 – 586 MPa depending on temper and form

• Yield Strength: 117 – 427 MPa

• Elongation: 5 – 38% (varies by temper)

• Hardness: Rockwell B 54–87

Physical Properties

• Density: 8.47 g/cm³

• Melting Range: Solidus 1630°F (888°C), Liquidus 1670°F (910°C)

• Electrical Conductivity: Approx. 26% IACS

• Thermal Conductivity: 67 BTU/(ft²·hr·°F)

• Coefficient of Thermal Expansion: 11.3 × 10⁻⁶ /°F

Fabrication and Applications

• Excellent machinability with a rating of 90% relative to free-cutting brass

• Suitable for blanking, machining, piercing, punching, stamping

• Excellent soldering and good brazing properties

• Not recommended for oxyacetylene or gas shielded arc welding

• Common in clocks, keys, fasteners, bearing cages, gears, valve stems, and automotive parts