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Industrial aluminum ingot
The raw materials in our daily industry are called aluminum ingots. According to the national standard (GB/T 1196-2008), they should be called "aluminum ingots for remelting", but everyone is used to calling them "aluminum ingots". It is produced by electrolysis using alumina-cryolite. After aluminum ingots enter industrial applications, there are two major categories: cast aluminum alloys and deformed aluminum alloys. Cast aluminum and aluminum alloys are aluminum castings produced by casting methods; deformed aluminum and aluminum alloys are processed aluminum products produced by pressure processing methods: plates, strips, foils, tubes, rods, shapes, wires and forgings.
According to the national standard, "remelting aluminum ingots are divided into 8 grades according to chemical composition, which are Al99.90, Al99.85, Al99.70, Al99.60, Al99.50, Al99.00, Al99.7E, Al99. 6E" (Note: the number after Al is the aluminum content). The aluminum called "A00" is actually aluminum with a purity of 99.7%, which is called "standard aluminum" in the London market.
Everyone knows that my country's technical standards in the 1950s came from the former Soviet Union. "A00" is the Russian brand in the Soviet Union's national standards. "A" is a Russian letter, not English "A", nor is it a Chinese phonetic alphabet. If "A" is in line with international standards, it is more accurate to call "standard aluminum". Standard aluminum is an aluminum ingot containing 99.7% aluminum, which is registered on the London market.
