
Steels used for manufacturing of parts are commonly called “tool steels”.1 They differ from other steels by their special performance, which is achieved through applying specific alloy contents and microstructures. This gives them unique properties such as high hardness and resistance to heat, wear and corrosion. This is necessary in order to shape and form often millions of parts for the end products each with the same quality and tolerance. One example is a press for a car body part. The tool steel used to shape the car part must be harder than the steel it shapes and it must last a long time without breaking or wearing down.