2.ステンレス鋼の材質グレードが異なるのはなぜですか

2.ステンレス鋼の材質グレードが異なるのはなぜですか？

In the smelting process of stainless steel, due to the addition of alloying elements, as well various qty of the elements, its characteristics are also different, in order to distinguish them, they are crowned with different material numbers. The following sheet is the content table of "alloying elements" for various grades of stainless steel material