# M30 — Carbide insert grade cross-reference by ISO application group and manufacturer

For M30, manufacturer is Seco; grade designation(s) is T25M TP300 CP50 F30M, recorded from its source on 2026-08-11.

- **ISO application code:** M30 _(verified: appears in the quote below)_
- **Manufacturer:** Seco _(our reading, not quoted from the source)_
- **Grade designation(s):** T25M TP300 CP50 F30M _(verified: appears in the quote below)_

## What the source says

> M30 | R-300 | US735 F620 F730 AP15TF | GC1020 GC1120 GC2035 GC2135 GC2040 | T25M TP300 CP50 F30M |

## 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 **T25M TP300 CP50 F30M**, as of 2026-08-11.

> M30 | R-300 | US735 F620 F730 AP15TF | GC1020 GC1120 GC2035 GC2135 GC2040 | T25M TP300 CP50 F30M |

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

aceratool.com says grade designation(s) is **TP3000 TP400 TP40 T350M T25M**, as of 2026-08-11.

> M30 | AC2115 AC21125 | GC2135 GC235 | PC9030 NC3030 | TT3500 | WAM30 | US735 F7030 | AC630M | T6030 T3130 | | JC215V JC325V | HG8025 GM25 | KC9040 KC9240 | TP3000 TP400 TP40 T350M T25M |

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/carbide-insert-grade-cross-reference/).