Productive and efficient steel turning

Sandvik Coromant is upgrading its range of turning inserts for machining ISO-P steels. The tooling specialist has launched two carbide grades, called GC4415 and GC4425, which are said to deliver increased toughness, heat resistance and predictable wear.

GC4415 and GC4425 are suitable for manufacturers machining mid to high batch sizes from low-alloyed (P 2.1 to 2.6) and unalloyed (P 1.1 to 1.5) steels, respectively. Sandvik Coromant says that GC4425 outperforms competing solutions in a majority of steel-turning applications. Users can deploy GC4425 and GC4415 for both finishing and roughing, in applications with continuous cuts and light interruptions.

Meanwhile, GC4415 complements GC4425 whenever there is a need for more heat resistance. In addition, the grade’s new post-treatment boosts performance in intermittent cutting operations, avoiding any sudden breakages.

According to Sandvik Coromant, inserts based on GC4415 and GC4425 grades show superior wear resistance over competing inserts, which contributes towards extended tool life and predictable performance. This performance attribute also minimises material waste, both from the workpiece and the insert.

In one case example, a general engineering manufacturer subjected a 421 / 280 pre-heat treated steel workpiece to multi-directional external roughing with a GC4425-grade insert. Compared with using a competitor’s ISO-insert for the same process, the customer was able to achieve a 100% productivity increase, with a reduced cycle time of 50% and a 30% cost reduction.

For better sustainability, the carbide substrate of these new grades contains a high proportion of recycled carbide material, more than 50%. Making grades from recycled material saves virgin raw material, and requires less energy and fewer CO2 emissions in production.

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