Description
CW707R is a brass alloy designed to resist dezincification while maintaining superb cold working characteristics and a pure α-structure. It’s particularly well-suited for applications in warm, acidic waters. Additionally, CW707R can be effectively employed in processes like coining, riveting, crimping, flanging, cold extrusion, and other cold working operations.
Chemical Composition
Mechanical Properties According To EN 12451 (As Per Temper R340)
| Range (mm) |
From |
To |
UTS Min (MPa) |
PS Min (MPa) |
Elongation Min (%) |
Hardness Min |
Hardness Max |
| Round (Dia) |
1.5 |
75 |
340 |
130 |
45 |
– |
– |
| Hex (A/F) |
3 |
70 |
340 |
130 |
45 |
– |
– |
| Square (A/F) |
3 |
60 |
340 |
130 |
45 |
– |
– |
| PHYSICAL PROPERTIES |
| Electrical conductivity %IACS |
28% |
| Thermal conductivity W/(m·K) |
126 |
| Thermal expansion coefficient (0–300 °C) |
10-6/K 19.7 |
| Density |
8.55 g/cm3 |
| Modulus of elasticity |
114 Gpa |
| FABRICATION PROPERTIES |
| Machinability (CuZn39Pb3 = 100 %) |
25% |
| Capacity for being cold worked |
Excellent |
| Capacity for being hot worked |
Fair |
| Resistance welding (butt weld) |
Good |
| Inert gas shielded arc welding |
Fair |
| Gas welding |
Good |
| Hard soldering |
Excellent |
| Soft soldering |
Excellent |
| Melting range |
910-965 °C |
| Hot working |
750 – 870 °C |
| Soft annealing (1–3 h) |
450–680 °C |
| Thermal stress relieving (1–3 h) |
200–300 °C |
