Copper is a metal element as well as a transition element, with Chemical symbol Cu, English copper, Atomic number 29. Brass is a copper zinc alloy, and brass composed of copper and zinc is called ordinary brass. Pure copper is a soft metal, with a red orange color with a metallic luster when the surface is first cut, and a purple red color in its elemental form. Good ductility, high thermal conductivity and conductivity, therefore, they are commonly used materials in cables, electrical and electronic components, and can also be used as building materials to form various alloys. Copper alloys have excellent mechanical properties and low electrical resistivity, with important ones being bronze and brass. In addition, copper is also a durable metal that can be recycled multiple times without compromising its mechanical properties.
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Brass is a copper zinc alloy, and brass composed of copper and zinc is called ordinary brass. It has high strength, high hardness, and strong chemical resistance. The mechanical performance of cutting is also outstanding. Brass has strong wear resistance and is often used in the manufacturing of valves, water pipes, air conditioning internal and external connecting pipes, and radiators. Seamless copper pipes made of brass are soft in texture and have strong wear resistance.
Purple copper is a simple substance of copper, named after its purple red color. Red copper is industrial pure copper, with a melting point of 1083 ℃, no allosteric transformation, and a relative density of 8.9, which is five times that of magnesium. The mass of the same volume is about 15% heavier than ordinary steel. Due to its rose red color and purple color after the formation of an oxide film on the surface, it is generally referred to as red copper. It is copper containing a certain amount of oxygen, hence it is also known as copper containing oxygen. The use of red copper is much wider than that of pure iron, with 50% of copper being electrolytic purified into pure copper every year for use in the electrical industry.
