Chrome steel
Chrome steel is the name for any one of a class of non-stainless steels such as AISI 52100, SUJ2, 100Cr6, En31, 100C6, and DIN 5401 which are used for applications such as bearings, tools, drills and utensils. Like stainless steel, chrome steels contain chromium, but do not have the corrosion-resistant properties of stainless steel. It has been made from ferrochrome since it was developed around 1877 by J. B. Boussingault and of Jacob Holtzer steelworks in Unieux, France.