CW716R
CW716 is a specialized brass alloy characterized by medium strength, excellent resistance to atmospheric corrosion, and favorable sliding properties. These attributes are achieved through the inclusion of manganese and aluminum as alloying elements. CW716R is typically employed as a standard bearing material in applications with moderate loads within the field of machine construction.
CHEMICAL COMPOSITION
| Elements | Min (%) | Max (%) |
| Cu | 59.00 | 61.50 |
| Pb | – | 1.00 |
| Sn | – | 0.30 |
| Fe | – | 0.10 |
| Al | 0.30 | 1.30 |
| Mn | 0.60 | 1.80 |
| Si | – | 0.50 |
| Ni | – | 0.60 |
| Total Others | – | 0.30 |
| Zn | Remainder | |
MECHANICAL PROPERTIES ACCORDING TO EN12163 CW716R (AS PER TEMPER R440)
| Range (mm) | From | To | UTS Min (MPa) | PS Min (MPa) | Elongation Min (%) | Hardness Min | Hardness Max |
| Round (Dia) | 8 | 75 | 440 | 200 | 15 | – | – |
| Hex (A/F) | 8 | 60 | 440 | 200 | 15 | – | – |
| Square (A/F) | 8 | 60 | 440 | 200 | 15 | – | – |
| Rectangle (Thickness) | 8 | 50 | 440 | 200 | 15 | – | – |
| PHYSICAL PROPERTIES | |
| Electrical conductivity | 7.8 %IACS |
| Thermal conductivity | 63 W/(m•K) |
| Thermal expansion coefficient (0–300 °C) | 21.1 10-6/K |
| Density | 8.24 g/cm³ |
| Modulus of elasticity | 93 Gpa |
| FABRICATION PROPERTIES | |
| Machinability (CuZn39Pb3 = 100 %) | 40% |
| Capacity for being cold worked | Poor |
| Capacity for being hot worked | good |
| Resistance welding (butt weld) | good |
| Inert gas shielded arc welding | fair |
| Gas welding | Poor |
| Hard soldering | fair |
| Soft soldering | Poor |
| Melting range | 860-910 °C |
| Hot working | 600–700 °C |
| Soft annealing | 500–650 °C (1–3 hr) |
| Thermal stress relieving | 300–430 °C (1-3 hr) |
