# K20 — Carbide insert grade cross-reference by ISO application group and manufacturer

For K20, manufacturer is Iscar; grade designation(s) is IC910, recorded from its source on 2026-08-11.

- **ISO application code:** K20 _(verified: appears in the quote below)_
- **Manufacturer:** Iscar _(our reading, not quoted from the source)_
- **Grade designation(s):** IC910 _(verified: appears in the quote below)_

## What the source says

> K20 | R-300 R-400 | UP10H UC6010 AP15TF | GC1020 GC1120 GC3025 GC3020 GC4025 | TX150 T15M T25M T250M TP200 | AC500G EH20Z | T1015 T5020 AH120 J740 | KC992M KC7215 KC9315 KC7225 KC9025 CM4 KC520M KC525M KC920M KC925M KC709M KC7020 | IC910 |

## Sources disagree

More than one authority states this, and they do not state the same
thing. Both are reproduced with the source each came from.

### Grade designation(s)

romaycorp.com says grade designation(s) is **IC910**, as of 2026-08-11.

> K20 | R-300 R-400 | UP10H UC6010 AP15TF | GC1020 GC1120 GC3025 GC3020 GC4025 | TX150 T15M T25M T250M TP200 | AC500G EH20Z | T1015 T5020 AH120 J740 | KC992M KC7215 KC9315 KC7225 KC9025 CM4 KC520M KC525M KC920M KC925M KC709M KC7020 | IC910 |

Source: https://romaycorp.com/charts/carbide-comparison-chart/

aceratool.com says grade designation(s) is **IC9015, IC9150 IC418, IC520M**, as of 2026-08-11.

> K20 | AC3125 | GC3215 GC3020 K20W | NC315K | TT1500 | WAK20 | UE6010 | AC700G AC820P | T5115 T5125 T5020 | CA4515 | JC110V JC215V JC610 | HG8025 GM8020 | KC8050, KC9025 KC9120, KC9325 | TK2000 TP200 T150M T200M | IC9015, IC9150 IC418, IC520M |

Source: https://www.aceratool.com/carbide-insert-grades-chart/


## Source

- https://romaycorp.com/charts/carbide-comparison-chart/
- https://www.aceratool.com/carbide-insert-grades-chart/

Last verified: 2026-08-11. Review by: 2028-08-10.
Part of [Carbide insert grade cross-reference by ISO application group and manufacturer](https://referencesource.org/industrial-consumable-tooling-cross-reference/).