CW624N

DESCRIPTION

CW624N Leaded brass, is a significantly improved form of 60/40 brass, It is used in the mass production of brass components where maximum output and longest tool life are required, and where no further cold forming after machining is required.

CHEMICAL COMPOSITION

Elements Min (%) Max (%)
Cu 55.00 57.00
Pb 1.60 3.00
Sn - 0.30
Fe - 0.30
Al 0.50 0.50
Ni - 0.30
Total Others - 0.20
Zn Remainder

MECHANICAL PROPERTIES ACCORDING TO BS2874 (AS PER TEMPER M)

No Mechanical properties for this alloy. Mechanical properties as agreed between punchers and supplier.

PHYSICAL PROPERTIES
Electrical conductivity %IACS 25
Thermal conductivity W/(m·K) 113
Thermal expansion coefficient (0–300 °C)  10-6 /K 21.40
Density 8.46 g/cm3
Modulus of elasticity 96 Gpa
FABRICATION PROPERTIES 
Machinability (CuZn39Pb3 = 100 %) 80%
Capacity for being cold worked Poor
Capacity for being hot worked Excellent
Resistance welding (butt weld) Fair
Inert gas shielded arc welding Poor
Gas welding Poor
Hard soldering Fair
Soft soldering Excellent
Melting range 880–895 °C
Hot working 650–800 °C
Soft annealing  (1–3 h) 450–600 °C
Thermal stress relieving (1–3 h) 200–300 °C

TYPICAL USES

  • Builders Hardware
  • Consumer
  • Building
  • Industrial