Bernex 29 HSA for high cutting speeds

Bernex™ 29 HSA Al2O3

Bernex™ 29 HSA

Bernex™ 29 HSA is exceptionally well-suited for high-volume machining of cast iron and cast steel at medium to high cutting speeds and high temperatures due to the thermo-dynamically stable structure of its ceramic content.

The αAl2O3 layer, as a functional layer, not only exhibits an exceptional hot-hardness, it also features a very low thermal conductivity, which significantly increases tool lifetime. TiN, as a surface layer, protects the hard ceramic αAl2O3 layer from wear damage  during the cutting start-up phase.

Bernex™ 29 HSA is applied at ca. 1000 °C by means of CVD and is suited for cemented carbide cutting inserts.

Technical data




Coating thickness

8 - 15 μm

Service Temp.

1200 °C

Deposition Temp.

1000 °C

Hardness HV 0.05


Deposition method


Friction vs. steel, dry




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