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    • Rame - Sfera

      Known to ancient civilisations. Copper is a reddish coloured metal which is malleable and ductile. It has excellent thermal and electrical conductivities and good corrosion resistance. It is found in sulphide ores and as carbonate, arsenide and chloride (abundance in the Earth's crust is 50 ppm). Extraction of the metal involves roasting the ore to produce the oxide, followed by reduction and purification by electrolysis. The element is inert to non-oxidising acids but reacts with oxidising agents. In air, it will weather to produce the characteristic green patina of the carbonate. Copper will combine with oxygen on heating to produce CuO at red heat, and Cu₂O at elevated temperatures. Pure copper has an electrical conductivity second only to that of silver and hence its main application is in the electrical industry. Copper is also the basis of many important alloys (e.g. brass, bronze and aluminium bronze) and has been traditionally considered to be one of the coinage metals, along with silver and gold, but being more common, is the least valued. It is one of the first metals ever to have been worked by man and is thought to have been mined for more than 5000 years.Sfera - Una forma solida o cava regolare tridimensionale in cui qualsiasi sezione trasversale è circolare. Le sfere sono disponibili con tolleranze standard o di precisione, e possono essere fornite con diverse finiture superficiali in base al materiale.

    3 risultati

    Prodotto CU00-SP-000120 Rame - Sfera Diametro 1mm Grado Grade 200 Quantity 10 Piece - 1000 Piece
    Prodotto CU00-SP-000130 Rame - Sfera Diametro 2mm Grado Grade 200 Quantity 10 Piece - 1000 Piece
    Prodotto CU00-SP-000140 Rame - Sfera Diametro 3mm Grado Grade 200 Quantity 10 Piece - 1000 Piece
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