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This work presents the metallographic properties results of few copper objects from the middle ages. In history as well as today, non-ferrous alloys are often used where copper and its alloys take their prominent pace; it is worth mentioning here the main groups of copper alloys: bronzes, brasses, alloyed copper and copper-matrix alloys for special requirements. The physico-chemical and technological properties of casting copper alloys determine their quality and application. Besides these properties are strongly affected by metallurgical process for obtaining copper, alloying additions and control of melting, refining and casting processes. To the advantageous properties of copper alloys should be included the high resistance to corrosion, therefore the discovered artifacts are usually in good condition. Also, artistic value and availability of raw materials determine the use of copper alloys for casting usable and ornamentals products. [1-4]
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