APPLICATIONS & WELDING
Copper has unique properties of electrical and thermal conductivity and resistance to oxidation and atmospheric corrosion. It is a very soft and easy to shape.
Different copper alloys are selected in many cases of design in order to meet the requirements for each application: high mechanical strength, corrosion resistance, wear resistance, etc. Among these alloys, there is the following: brasses (Cu-Zn), bronzes (Cu-Sn), aluminum bronzes(Cu-Al) or cuproaluminium alloys, cupro-nickel (Cu-Ni), nickel silver (Cu-Ni-Zn). Copper and its alloys are used in many industrial fields like present maritime industry (propellers), energy and chemical processing equipments: steam condensers, heat exchangers, propellers, sea water pipes, tubing, distillation units, radiators, etc.
Copper has a thermal expansion coefficient (TEC) of 1.3 times that of steel. As a result, high levels of distortion and residual stresses arise in the metal with risk of cracking in the welded joints. To prevent this, it is recommended to ensure a good preheat the metal must be preheated and welding done without constraint.
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