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Quenchable boron steels represent a breakthrough in heat treatment technology. These steels use boron as a hardening agent. The melting and refining processes, together with thermomechanical treatment by controlled hot rolling, allow ArcelorMittal quenchable boron steels to obtain a remarkable degree of hardness and a very uniform microstructure, resulting in excellent mechanical loading performance after heat treatment of the finished part.
Their extreme hardness after heat treatment makes these grades particularly suitable for applications requiring high wear/abrasion resistance. Their use allows significant weight saving (up to 50% compared with an HSLA grade) in structural and automotive components. The specific advantage of ArcelorMittal's quenchable boron steels is their suitability for water quenching, making the process more environmentally friendly (less effluent treatment) than that used for conventional carbon steels. Their hardening performance is excellent with both liquid and gas quenching.
