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The purpose of spheroidite steel is to soften.it is commonly used in desired intricate specifications or shape, the hardness of this annealed steel max Rockwell B 88..the steel like medium carbon, chrome-vanadium .finished fine grain, then in the heating treated conditions of which designated temperature and time , the structure of spheres of cementite within primary structure readapted to. allow more formability , most ductile ,abrasion resistance and good wear or toughness