Milling inserts and grades for hardened steel
Modern milling insert grades for hardened steel are designed for productive machining at realistic costs per part. Find the right insert grade for your operation here.
GC1010
GC1010 is a PVD-coated grade for light roughing to finishing operations. With its exceptional resistance to plastic deformation, thermal cracking, and other types of wear, this grade can withstand long periods of time in cut and is suitable for machining hardened steel from 36 HRC and higher.Benefits and features
Milling Hard Steel
Discover more about this material group that contains hardened and tempered steel with hardness >45–65 HRC.
Milling – Initial Considerations
Milling has evolved into a machining method with a very broad range of operations. Carefully consider configurations before milling.
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Find your grade
The milling grade chain for hardened steel includes PVD and CVD carbide grades along with CBN-tipped grades, cermets, and ceramics for various machining conditions. Use the information below to find the right grade for your production.
| Stable conditions |  | |
| Unstable conditions | ||
Low heat (Small cutters | High heat (Large cutters |
GC1010
Hard, PVD grade with a thin coating for light roughing to finishing of hardened steel with 36 HRC and higher should be used in stable conditions for both wet and dry machining.
GC4220
Hard, CVD grade with a thick coating for light roughing to finishing at low feeds, moderate speeds, and large radial engagements in the lower ISO H hardness range for both wet and dry machining.
Complementary grades
Highlights
The Secret Behind GC1130
Zertivo™ is a unique production technology bringing longer tool life and enhanced security to PVD grades.
Zertivo™ Grade GC1130
Get set for a productive milling future with the impressive combination of CoroMill® 390 and GC1130.
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