Alloys, which are made of two or more than two kinds of metal and metal or non metal, which are made by a certain method. Generally obtained by melt synthesis of uniform liquid and solidification.
Life in common alloy ball graphite cast iron, manganese steel, stainless steel, brass, bronze, copper nickel alloy, soldering, duralumin, 18K gold, 18K platinum.
In nature, most metals to form compounds. Because the alloy is strictly proportional relationship, the natural concomitant of different metals can not even achieve a certain scale, so the nature of natural alloy of almost non-existent. However, in nature there are two metals together, called the associated, such as lead and zinc.