Description
This high copper alloy exhibits outstanding mechanical properties and exceptional wear resistance, even when exposed to elevated temperatures. However, its decreased workability, particularly during chip removal processes, limits its applications to the production of items such as bearings, bushings, and mechanical components that endure heavy loads.
Silicon brasses, including CW724R, belong to the high-strength brass subgroup. They are characterized by containing less than 20% zinc and less than 6% silicon. These brasses achieve their high strength through solid solution strengthening. They are commonly selected for applications requiring both high strength and reasonably high corrosion resistance, making them an ideal choice for underground service lines..
Chemical Composition
Mechanical Properties According To EN12163 CUZN31SI1 CW708R (As Per Temper R460)
| Range (Inch) |
From |
To |
UTS Min N/mm2 |
PS Min (ksi) |
Elongation Min (%) |
Hardness Min (HRB) |
Hardness Max(HRB) |
| Round (Dia) | 5.0 | 40.0 | 460 | 240 | 18 | – | – |
| Hex (A/F) |
5.0 |
40.0 |
460 |
240 |
18 |
– |
– |
| Square (A/F) |
5.0 |
40.0 |
460 |
240 |
18 |
– |
– |
| Octagon (A/F)
|
5.0 |
40.0 |
460 |
240 |
18 |
– |
– |
| PHYSICAL PROPERTIES |
| Melting Point – Liquidus°C | 880-915 |
| Density Kg/cm2. at 68°F | 8.40 |
| Specific Gravity | 8.5 |
| Electrical Conductivity% IACS at 68°F | 15 |
| Thermal ConductivityBtu/ sq ft/ ft hr/ °F at 68°F | 71 |
| Coefficient of Thermal Expansion 68-57210⁻⁶ per °F (68 – 572°F) | 19.4 |
| Specific Heat Capacity J/ (Kg K) | 377 |
| Modulus of Elasticity in GPa | 108 |
| FABRICATION PROPERTIES |
| Machinability |
40% |
| Capacity of being cold worked |
good |
| Capacity of being hot worked |
Fair |
| Resistance welding |
Good |
| Arc welding good | Good |
| Gas welding | Good |
