CW624N
CW624N, a leaded brass alloy, stands as a significant enhancement of the traditional 60/40 brass. It is the top choice for the mass production of brass components when the primary objectives are achieving peak output and maximizing tool lifespan. Moreover, it is the preferred option when no additional cold forming is needed following the machining process.
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 |
