Brass is an alloy of copper and zinc. If only brass made of copper or zinc is called ordinary brass. If it is composed of more than two kinds of elements, it is called special brass. Such as copper alloy composed of lead, tin, manganese, nickel, lead, iron and silicon. Brass has strong wear resistance. Special brass is also called special brass. It has high strength, high hardness and chemical resistance. There are also outstanding mechanical properties of cutting. Seamless brass tubes drawn from brass are soft and wear-resistant. Brass seamless tubes can be used for heat exchangers and condensers, cryogenic piping, and subsea transport tubes. Manufacturing of sheets, bars, bars, tubes, cast parts, etc. Containing copper in 62% to 68%, strong plasticity, manufacturing pressure equipment and so on.
Since we do not know what method the ancients used to smelt zinc or sauerganite, the use of brass in ancient times was not clear. Zinc's boiling point is lower than that of copper. When heating copper, charcoal also heats zinc ore and it is difficult to prevent zinc from evaporating. The Romans may have been the first to use this method on a large scale, but the craftsmen who melted the bronzes may have inadvertently produced brass, because the difference between tin and zinc was initially unclear. We should note that the brass mentioned in the Bible is actually bronze; the Roman coin known as Griss is also cast in bronze or bronze instead of brass. To complicate matters, they did make use of brass to make coins, but at first brass was more expensive than copper or bronze.
However, from the Middle Ages, brass was a luxury before it was used to make pots and plates. It was used only for commemorative tombstones and the like.
Since about 1230 AD, brass products have been popular in Europe for about 300 years because they are much cheaper than large sculptures. The bronze statue of Archbishop Wilp who died in 1231 is known as the earliest bronze statue made of brass. The process of casting brass products is as follows: The crushed zinc ore and charcoal are mixed and heated with a copper block to combine zinc and copper, and then heated to melt the alloy, and then the copper liquid is poured into the mold. The earliest brass fittings in the United Kingdom were imported, mainly imported from Tours. The client can order complete tombstones already installed in a beautiful floor or marble base from Tourne. The way to make bronze tombstones is to cast a bronze statue first. Usually the silhouette of the surrounding picket is also cast. Then it is placed in a prefabricated stone slab, and a person's details are carved on the bronze statue with a knife. Sometimes alabaster or other inlaid materials are used on the bronze figure's hands and face. After the bronze statue is safe, it is fixed on the stone base with the dark pin installed in the lead bolt. The bronze statue itself is placed on a layer of asphalt. Large bronze statues are cast in sections and then joined together.
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