Bronze refers to the alloy of copper and tin. However, more broadly, this does not have to be a double alloy or a tin must be an alloying element (therefore, in addition to tin, there are also aluminum, lead, manganese and other bronze. It is a double or triple alloy with at least 60% copper, and without zinc the main additional element.
In tin bronzes, the highest content of tin does not exceed 20%. The presence of tin in the alloy affects its strength and at the same time decreases its plasticity. This decline in plasticity is not particularly high to tin content up to 5%, but it is considerably faster afterwards. Because of this, the content of tin in the bronze casting is higher than in the bronze for deformation treatment. The strength increases up to 15% of tin and then decreases.
Alloys of copper with aluminum and other supporting elements (manganese, nickel, iron, etc.) in practice are called aluminum bronzes and they contain up to 11.5% aluminum in their composition. Increasing aluminum content in the Cu-Al alloy system increases the tensile strength, and at about 105 content it achieves its maximum. However, the deformation capacity with increasing aluminum content decreases to 2% Al and then grows and achieves the maximum peak at 8% Al.
ALUMINUM BRONZE - copper alloy with aluminum The alloy is durable in hot and cold sea water, it is resistant to corrosion and vibration and can withstand high loads. It is used for making bars, pipes, sheets, parts in hydraulics, bearings, pressure nuts, turbine rotor
KOSITRENA BRONZA - copper alloy with tin alloy The alloy is of good constructional properties, resistant to wear, resistant to corrosion and seawater. It is used for fittings, pipeline construction parts, for rotors of turbines and pumps, high-load bearings, tin bars, tin-plates and sheets.
RED LEFT - copper alloy with tin, zinc and lead. Bronze (red cast iron) alloy is suitable for hard and soft soldering, is resistant to seawater and corrosion, has good slip properties. It is used for the production of pipes, rods, profiles, rifles, loaded sliding parts, production of sliding bearings in machine construction, shaft shafts
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Brass is basically two-component copper (Cu) and zinc (Zn) alloys. In order to improve the properties of brass such as workability and corrosion resistance, other chemical elements are added in smaller quantities, thereby obtaining "special meshes".
Copper belongs to heavy metals. Its specific weight is about 8.93 kg / cm3 and the melting temperature is 1083ºC. Copper has no allotropic modification properties.