it is so called alloy steel

　　The steel in addition to iron, carbon, when added other alloying elements, it is so called alloy steel. Add the right amount of ordinary carbon steel, based on one or more alloying elements consisting of iron-carbon alloys. Depending on the added elements and take appropriate processing technology, we can have a high strength, high toughness, wear resistance, corrosion resistance, low temperature, high temperature, non-magnetic and other special properties. According to the content of alloying elements into three categories. 1) low alloy steel alloying elements the total content of 5% or less; 2) the total content of alloying elements in steel between 5% to 10%; 3) high-alloy steel alloying elements the total content of greater than or equal to 10%;

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