Copper square 4x4-50x50mm copper square bar CW004A (Cu-ETP - 2.0065) square rod Cu-ETP (size : 35 x 35mm, length : 0.02 Meter)

This copper square bar, designated as Cu-ETP, is made from electrolytically refined, oxygen-containing copper with a purity of at least 99.9%. The oxygen content does not exceed 0.04%, which means the material is not suitable for welding due to the risk of hydrogen embrittlement. However, it offers excellent cold and hot formability and is highly suitable for soft soldering, though brazing in a reducing atmosphere and machining are not recommended. Thanks to its outstanding electrical and thermal conductivity, this copper bar is widely used in heating and cooling applications (such as radiators and heat exchangers), electrical machines (including electric motors, chokes, and coils), and various electrical components like terminals and contact carriers. It also finds applications in building decoration, shipbuilding, mechanical engineering, electric lines, and wire windings. Key properties of this copper square bar include excellent processing and soldering capabilities, good resistance to corrosion, and superior formability. However, it is not suitable for sweating, cannot be brazed in a reducing atmosphere, and has poor machinability. The surface is smooth but may show marks from handling or storage.