CW713R
CW713R is a distinctive brass alloy recognized for its exceptional wear resistance, primarily attributed to the presence of embedded silicides within its structure. This alloy is extensively employed in the manufacturing of slide bearings and valve guides and finds application in various construction components within the field of mechanical engineering. Furthermore, CW713R is exceptionally well-suited for use in hot stamped parts where elevated mechanical strength and heightened wear resistance are essential attributes.
CHEMICAL COMPOSITION
| Elements | Min (%) | Max (%) |
| Cu | 57.00 | 59.00 |
| Pb | 0.20 | 0.80 |
| Si | 0.30 | 1.30 |
| Mn | 1.50 | 3.00 |
| Sn | – | 0.40 |
| Fe | – | 1.00 |
| Ni | – | 1.00 |
| Al | 1.30 | 2.30 |
| Total Others | – | 0.30 |
| Zn | Remainder | |
MECHANICAL PROPERTIES ACCORDING TO EN12164 CW713R (AS PER TEMPER R540)
| Range (mm) | From | To | UTS Min (N/mm²) | PS Min (N/mm²) | Elongation Min (%) | Hardness Min | Hardness Max |
| Round (Dia) | 5 | 75 | 540 | 280 | 15 | – | – |
| Hex (A/F) | 5 | 60 | 540 | 280 | 15 | – | – |
| Square (A/F) | 5 | 60 | 540 | 280 | 15 | – | – |
| PHYSICAL PROPERTIES | |
| Electrical conductivity | 7.8 %IACS |
| Thermal conductivity | 63 W/(m•K) |
| Thermal expansion coefficient (0–300 °C) | 20.6 10-6/K |
| Density | 8.12 g/cm³ |
| Modulus of elasticity | 93 Gpa |
| FABRICATION PROPERTIES | |
| Machinability (CuZn39Pb3 = 100 %) | 50% |
| Capacity for being cold worked | Poor |
| Capacity for being hot worked | excellent |
| Resistance welding (butt weld) | good |
| Inert gas shielded arc welding | good |
| Gas welding | fair |
| Hard soldering | Poor |
| Soft soldering | Poor |
| Melting range | 875 – 910 °C |
| Hot working | 600–700 °C |
| Soft annealing | 500–650 °C (1–3 hr) |
| Thermal stress relieving | 350–450 °C (1-3 hr) |
