Copper square 4x4-50x50mm copper square bar CW004A (Cu-ETP - 2.0065) square rod Cu-ETP (size : 15 x 15mm, length : 0.02 Meter)

The copper square bar, identified as Cu-ETP (material number 2.0065, CW004A), is made from electrolytically refined copper with a purity of at least 99.9% and a maximum oxygen content of 0.04%. This composition gives the bar high electrical and thermal conductivity, making it ideal for applications in heating and cooling systems, electrical engineering, apparatus construction, building decoration, shipbuilding, and mechanical engineering. Typical uses include electric lines, wire windings, chokes, and various machine components. The material stands out for its excellent cold and hot formability, superb processing properties, and very good solderability. It also offers good resistance to corrosion. However, it is not suitable for welding due to hydrogen embrittlement and is not recommended for brazing in a reducing atmosphere or for machining. The copper square bar is supplied in a semi-hard to hard condition with a smooth surface, though minor marks from handling or storage may be present. In summary, this copper square bar is valued for its reliable performance in electrical and thermal applications, easy processing, and decorative uses, provided that welding or brazing in a reducing atmosphere is not required.