Bearing steel

Technical data sheets for bearing steel

Definition and applications

Bearing steel is a particular category of construction steels, which are also defined as “Chromium through hardening steel” with 1% Carbon. After quenching, this steel is extremely hard and resistant to wear and to compression. It is universally used for making ball-bearings, rollers and rolling bearing rings, standardizing elements for molds, spindles and reeds for textile machines, parts for weighing scales, etc.


Heat-treated bearing steel is the most widely used category. It has a martensitic and/or bainitic microstructure at room temperature and its final hardness after adequate heat treatment can reach a range of 60-64 HRC and is practically homogeneous throughout the entire section. Internationally, the best-known steel of this category is 100Cr6, an alloy which contains approximately 1% Carbon and 1.5% Chromium and which is used in the construction of standardized elements for molds such as punches, extractors, plugs, sockets, columns etc.


Product range


Steel qualityStandardProcessing routesSupply statusRounds (mm)Squares (mm)Flats (mm)
100Cr6EN 683-17RolledSpheroidal annealed20-115