Molybdenum is an important strategic resource, very rich and its total reserves ranks second in the world. Major consumption of molybdenum is in the iron and steel industry, accounting for 70%～80％ of molybdenum products, of which the molybdenum consumption of various structural alloy steel accounted for 43%～44% of the total consumption of molybdenum, the molybdenum consumption of stainless steel consumption accounted for 22%～23%, the molybdenum consumption of tool steel and high-speed steel was about 8%, and the consumption of cast steel and roll was about 6%. Almost all of the steels contain molybdenum, whose content is generally 0.1% to 10%. This is because molybdenum can give a uniform microcrystalline structure of steel and improve the performance of steel as an alloying agent, such as raising the steel hardness, creep resistance, especially high temperature strength and toughness, improving the corrosion resistance of steel and wear-resistant performance, the hardenability of steel, welding and thermal resistance, etc..
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