The Surface Engineers

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  
Material TiN+Ti(C,N)+αAl2O3+TiN
Coating thickness 8 - 15 μm
Service Temp. 1200 °C
Deposition Temp. 1000 °C
Hardness HV 0.05 3000
Deposition method CVD
Friction vs. steel, dry 0.3
Color gold