CW707R
DESCRIPTION
CW707R is a dezincification resistant brass with excellent cold working properties and a pure α-structure. This alloy is used for applications in warm, acidic waters. CW707R is also suitable for coining, riveting, crimping, flanging, cold extrusion or other cold working operations.
CHEMICAL COMPOSITION
| Elements |
Min (%) |
Max (%) |
| Cu |
68.50 |
71.50 |
| Pb |
- |
0.07 |
| Fe |
- |
0.05 |
| As |
0.02 |
0.06 |
| Total Others |
- |
0.20 |
| Zn |
Remainder |
MECHANICAL PROPERTIES ACCORDING TO EN12451 (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 |
TYPICAL USES
- Architecture
- Automotive
- Builders Hardware
- Consumer
- Electrical
- Fasteners
- Industrial
- Ordnance
- Plumbing
