Carbide grade · Mitsubishi · ISO K20
Mitsubishi MH515
MH515 is a Mitsubishi carbide turning insert grade placed at the ISO K20 application position (cast iron) in manufacturer-published grade comparison charts. The charts list 4 comparable grades from 3 brands at the same position. Sharing an ISO position is a chart placement, not a claim the grades are interchangeable — verify on a sample part before switching.
Grade summary — Mitsubishi MH515
| Brand | Mitsubishi |
|---|---|
| ISO application position | K20 — cast iron |
| Coating / substrate | Not verified in the reference charts |
| Placement verification | Independently confirmed by 2+ published charts |
| Chart sources | Ingersoll turning grade cross-reference (live-fetched 2026-07-14), TaeguTec grade comparison table, Tungaloy grade comparison chart, Mitsubishi Materials grades comparison table, Reliable Industrial Supply chart |
Comparable grades at ISO K20 — per published comparison charts
| Brand | Grade | ISO position | Chart verification |
|---|---|---|---|
| Korloy | NC6215 | ISO K20 | independently confirmed (2+ charts) |
| TaeguTec | TT7025 | ISO K20 | independently confirmed (2+ charts) |
| Ceratizit | CTCK120 | ISO K20 | single chart |
| Korloy | NC315K | ISO K20 | single chart |
2 of the 4 placements are independently confirmed by two or more charts. None of this is a metallurgical equivalence claim: chipbreaker geometry, coating and edge preparation differ between brands. The safe path is always a sample-part test.
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