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Turning inserts and grades for steel

Whether you are looking for turning insert grades for unmanned production or custom-made components, we have reliable insert grades that offer predictable tool life, high machine utilization and the surface quality you need.

GC4325

​From finishing to roughing, this carbide grade is your first choice when turning steel. Coated with Inveio™ technology, it has a broad range of applications and is recommended for continuous and interrupted cuts.

Benefits and features

  • High edge line security
  • Long tool life at high cutting data
  • Predictability and security

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Steel turning grade GC4325 with Inveio™

How separate elements fit together for unbeatable strength, wear resistance and tool duration.


Steel turning endurance white paper

Learn how new innovation delivers best-practice solutions to daily machining challenges.

Finish strong with wiper inserts

Capable of turning at high feed rates, a wiper insert generates a smooth surface as it is fed along the workpiece.

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Introducing 4325 for steel turning

A breakthrough in material science, see how this grade sets new performance standards in the industry.

Find your grade

Our steel insert grade assortment consists of CVD- and PVD-coated carbide grades for various machining conditions. Use the information below to find the right grade for your production.

Application area
Machining conditions: GoodAverageDifficult

GC4305

Recommended for stable conditions when a higher metal removal rate is needed in medium to rough steel applications.​​

CoroTurn® 107: First choice for external and internal machining of small and slender components.

T-Max® P: First choice for general turning, from small components to heavy machining.

See complete assortment

GC4315

CVD-coated carbide grade can be used for finishing to roughing in applications with continuous cut to light intermittence.

CoroTurn® 107: First choice for external and internal machining of small and slender components.

CoroTurn® 300: Good for chip control, offers over- and under-coolant and iLock™ technology.

CoroTurn® TR: First choice in external profiling with iLock™ technology.

T-Max® P: First choice for general turning, from small components to heavy machining.

See complete assortment

GC4325

First-choice CVD-coated grade for finishing to roughing of steel and steel castings in continuous and interrupted cuts at high metal removal rates.

CoroTurn® 107: First choice for external and internal machining of small and slender components.

CoroTurn® TR: First choice in external profiling, with iLock™ technology.

CoroTurn® 300: Good for chip control, offers over- and under-coolant and iLock™ technology.

T-Max® P: First choice for general turning, from small components to heavy machining.

See complete assortment

GC4335

GC4335 CVD-caoted carbide grade with Inveio coating technology for rough turning of steel and steel castings. Recommended for interrupted cuts and unfavourable conditions.

CoroTur​n® 107: First choice for external and internal machining of small and slender components.

T-Max® P: First choice for general turning, from small components to heavy machining.

See complete assortment

Complementary grades

CT5015

Uncoated cermet grade, resistant to built-up edge and plastic deformation. Use for finishing when high surface quality or low cutting force is required.

View complete assortment

GC1515

​Thin CVD-coated carbide grade, for finishing of low-carbon to low-alloy steels and other "sticky" steel alloys using medium to low cutting speed.​

View complete assortment

GC3005

​Wear-resistant and heat-resistant CVD-coated grade. Use for finishing and semi-finishing at high cutting speed in high-alloy steels.

View complete assortment

GC1525

​PVD-coated cermet. Wear resistant with edge toughness for finishing and semi-finishing of low-carbon and low-alloy steels. Good surface quality.

View complete ​assortment

Highlights

Low carbon steel machinability

Chip breaking and smearing (built-up edge) are common in low-carbon steels. Discover machining strategies to improve your turning operations.

Inveio™ – uni-directional crystal orientation

Tightly packed uni-directional crystals create a strong barrier towards the cutting zone and chip for improved crater and flank wear resistance.

Struggling to find the right tool for the job?

Let CoroPlus™ ToolGuide help you get quick and accurate tool recommendations – on all your devices!

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