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Inserts and grades

Zertivo™ technology

Zertivo™ is a unique production technology of Sandvik Coromant that brings longer tool life, improved predictability and enhanced security to PVD grades.

​The innovation behind the technology

Creating a high-quality PVD coating includes many complex process steps, the main ones being pumping, heating, etching, coating and cooling. Process parameters such as temperature, gas flow and pressure, for example, are crucial for the final tool performance. Process conditions have a direct impact on the grade and, in the end, on how the tool performs in your machine. Zertivo™ takes technology process control to a new level, from the beginning to the end of the PVD production process. Each grade is produced in conditions exactly right for that specific grade. The result is improved adhesion between substrate and coating and optimized cutting edge integrity.


Zertivo™ technology



Insert grades produced with Zertivo™ technology


Inside the GC1130 insert

High-Cr content substrate

PVD coating produced with Zertivo™ technology


Inside the GC4344 insert

High-Cr content substrate

PVD coating produced with Zertivo™ technology



What does Zertivo™ technology deliver?

It enables increased control of the grade production process, which is carefully adapted to grade-specific requirements.


What distinguishes a grade produced with Zertivo™ technology?

Improved adhesion between substrate and coating and optimized cutting edge integrity.


What value does Zertivo™ technology give you?

Zertivo technology amplifies each grade's unique benefits, resulting in longer tool life and secure machining.




Inveio® – Uni-directional crystal orientation

Inveio® is the technical breakthrough of uni-directional crystal orientation in the alumina coating layer that gives inserts a new level of wear resistance and tool life.

The material science behind the technology

In conventional CVD alumina coatings, crystal growth direction is random. When developing Inveio®, our experts found a way to control the growth in this coating layer to ensure that all of the crystals lined up in the same direction, with the strongest part towards the top surface. This can be seen in the microscope images below, where each crystal direction is given a unique color.


Inveio<sup>®</sup> – Uni-directional crystal orientation





In conventional CVD alumina coatings, the crystal orientation is random.




With Inveio®, every crystal in the alumina coating is lined up in the same direction, toward the top surface.

The effect of Inveio®

The tightly-packed, uni-directional crystals create a strong barrier towards the cutting zone and chip. This greatly improves crater wear and flank wear resistance. Another effect is that heat is more rapidly led away from the cutting zone, helping the cutting edge stay in shape for longer times in cut.


Predictability and long tool life

Inveio® has the greatest single effect on insert strength, wear resistance and tool duration. The effect of Inveio® coating is combined with all other elements of the insert: the substrate, the shape of the cutting edge and the post-treatment process. Together, this results in long and predictable tool life.


Insert grades with Inveio®

Sandvik Coromant has successfully implemented this coating technology on the following grades:

  • GC4325 – The First-choice grade for steel turning.
    View assortment
  • GC4315 – Your option for steel turning with a high metal removal rate
    View assortment
  • GC4305 – Steel turning efficiency in stable conditions
    View assortment
  • GC4335 – Steel turning efficiency in unstable conditions
    View assortment
  • GC2220 – Stainless steel turning in stable conditions
    View assortment
  • GC3330 – The First-choice grade for cast iron milling
    View assortment
  • GC4334 – Your First-choice insert grade for secure and predictable drilling
    View assortment
  • GC4324 – Your productivity choice for drilling in stable conditions
    View assortment

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