The performance of these grades is due to the Inveio uni-directional crystal orientation whereas. normally, crystal orientation in the inserts’ CVD alumina coating is random. Sanvik arrived at this breakthrough when they successfully found a way to control the crystals, making them all line up in the same direction – towards the top surface. These tightly-packed crystals create a strong barrier towards the cutting zone and chip. The grades, therefore, deliver wear resistance and cutting edges that stay in shape for long times in cut. The long, predictable tool life of GC4325, GC4315 and GC3330 enables secure unmanned production with high metal removal rate.
The GC4325 has been designed for steel turning due to the insert grade being able to withstand he high cutting temperatures that occur. The GC3330 is a suitable grade for milling in cast iron materials.
https://www.youtube.com/watch?v=kOTOigD82BA