Heat-Treatable Steel - Perfect balance - Hardness & Ductility

The name heat-treatable steel originates from the quenching and tempering process of the steel. Quenching and tempering the steel, the so-called conversion hardening, has a direct impact to the balance of hardness and ductility.

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The carbon content pre-determines and gives the steel its hardness.

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The first step for quenching and tempering steel is the hardening process. By cooling the steel down quickly (quenching), after heating, the carbon will get “trapped” to build a very hard structure, also referred to as martensite. The following tempering process is the re-heating of the material to a lower temperature which reverts the structure back to a more ductile condition (Ferrite and Perlite). After the tempering process heat-treatable steels have specific and pre-determined technical properties. This could be a wanted tensile strength combined with a good ductility for example which the grade would not have in its normal condition.

It is therefore a finely tuned balance that must be achieved in order to obtain the perfect properties for the respective application. And this is precisely what makes the production and use of heat-treatable steels so interesting and challenging at the same time.

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