CW622N
CW622N, a leaded brass, represents a notable advancement in the 60/40 brass category. It finds extensive use in large-scale production of brass components where optimizing output and tool longevity are paramount considerations. Additionally, this material is preferred when there is no subsequent cold forming required after machining.
CHEMICAL COMPOSITION
| Elements | Min (%) | Max (%) |
| Cu | 55.00 | 57.00 |
| Pb | 0.8 | 1.60 |
| Sn | – | 0.30 |
| Fe | – | 0.30 |
| Al | 0.5 | 0.5 |
| 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 |
| 10-6 /K 21.40 | 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 |
