Sandvik Coromant GC1240: PVD Nano-Coated Inserts for Stainless

Nanonana Sandvik launches indexable insert with special nano-coating

2026-03-24 Source: Sandvik Coromant 1 min Reading Time

With the GC1240, Sandvik Coromant is introducing the latest generation of indexable inserts for machining stainless steel, featuring a multilayer nano-coating applied via a PVD process.

With the GC1240 insert grade, Sandvik Coromant is bringing to the machining world a solution featuring a special coating that makes the tooling system significantly more wear-resistant and boosts productivity ...(Source: Sahdvik Coromant) — With the GC1240 insert grade, Sandvik Coromant is bringing to the machining world a solution featuring a special coating that makes the tooling system significantly more wear-resistant and boosts productivity ...
(Source: Sahdvik Coromant)

Sandvik Coromant’s GC1240 insert grade is designed to handle even demanding stainless steel machining applications without significant loss of performance. This is made possible by a multilayer nano-coating applied through physical vapor deposition. Sandvik Coromant refers to the process as Zertivo coating technology. The advanced nano-multilayer combines the titanium alloys TiAlN and TiSiN. According to the company, it brings together the rare combination of edge toughness and wear resistance in one system. With conventional grades, a trade-off between these properties is usually required, Sandvik notes. This makes the insert less susceptible to thermally induced cracking while also reducing tool wear.

More productive in dry machining than with coolant

Sandvik says tool life can even be predicted. Equipped with these cutting edges and a stable, positive and sharp geometry, the inserts are said to enable everything from light roughing to finishing, either with or without cutting fluid. In the dry machining of stainless steels, especially austenitic grades, the GC1240 can reportedly be around 20 percent more efficient under ideal conditions than machining with coolant. This increases productivity while reducing energy consumption, the company adds. Sandvik Coromant also notes that the GC1240 can be used for heat-resistant superalloys and titanium materials as long as the recommended cutting speeds are observed. At present, 13 tools in the Coromill series are available with this grade.

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