SuperA Coating

The well established SuperA coating known as AlTiN coating (Aluminum Titanium Nitride coating), has been developed at Guhring. By optimizing the structural, chemical and mechanical properties of the new SuperA coating are an extremely high hot hardness, very good oxidation resistance and excellent coating adhesion have been achieved. This coating is used exclusively on carbide cutting tools and is ideally suited for difficult to machine aerospace materials such as titanium alloys, Inconel as well as machining hardened steel materials (>52 HRC) and HSC applications.

Colour Grey violet
Coating process Physical Vapour Deposition
Layer structure Monolayer
Thickness [µm] 1.5 - 3.0
Hardness [HV 5g] 2400
Friction coefficient 0.6
Deposition temp. [°C] 400 - 500 °C
Maximum operating temperature [°C] 900 °C
Applications High performance
Workpiece materials Hardened steels Cast irons AIsi alloys

Super A Coating SurfaceSuperA Coating


Twist drills: stainless steels, fiber-reinforced plastics
Threading tools: stainless and hardened steels, cast materials
Milling cutters: stainless steels, cast materials, fiber-reinforced plastics
Reamers: un-alloyed, alloyed and stainless steels