Which carbide grades from other manufacturers are equivalent to Mitsubishi MBS140?

Mitsubishi MBS140 sits at ISO 513 K20, K30. Grades from other makers at the same application position, each supported by two or more manufacturer-published comparison charts: Kennametal KC524M (K20, K30; 3 manufacturer charts); Sumitomo ACK3000 (K20, K30; 3 manufacturer charts); Sumitomo ACU2500 (K20, K30; 3 manufacturer charts); Kyocera PR1510 (K20, K30; 2 manufacturer charts); Seco 883 (K20, K30; 2 manufacturer charts); Seco MK2050 (K20, K30; 2 manufacturer charts); Sumitomo BNS8125 (K20, K30; 2 manufacturer charts); Tungaloy AH120 (K20, K30; 2 manufacturer charts); Tungaloy BX90S (K20, K30; 2 manufacturer charts); Tungaloy BXC90 (K20, K30; 2 manufacturer charts). Same ISO position is not a drop-in swap; validate any change on one machine and one sample part.

Is a grade at the same ISO 513 position as Mitsubishi MBS140 interchangeable with it?

No. Same ISO 513 application class means the manufacturers position the grades for the same workpiece group and toughness/wear range, not that coating, substrate and edge preparation are identical. Tool life and surface finish can differ; test the candidate on a sample part before changing production. Source charts are published by the manufacturers themselves; CuttingToolsAI sells no tools and takes no commission.

Cross-brand grade equivalence · brand-neutral

Mitsubishi MBS140 equivalents

How to read this page. These matches are compiled from grade comparison charts the manufacturers publish themselves, cross-checked against each other. A match means two grades are placed at the same ISO 513 application position, which is where the maker says the grade belongs. It does not mean the grades are interchangeable: substrate, cobalt content, coating and edge preparation still differ, and so will tool life and the cutting data you should start from. Validate any swap on a sample part before you change production. Something wrong on this page, or a grade you want removed? research@cuttingtoolsai.eu.

Mitsubishi MBS140 sits at ISO 513 application classes K20, K30 — cast iron. 10 grades from other manufacturers cover that same full range and are confirmed by two or more manufacturer charts.

Grades placed at the same full ISO range

10 grades from other makers cover every one of MBS140's application classes, not merely one of them, and are confirmed by two or more manufacturer charts. The 5 best-evidenced are shown; the rest are listed below. A grade that covers only part of the range is not listed as an equivalent here.

Grade	Shared ISO classes	Evidence	Why it placed here
Kennametal KC524M	K20, K30	3 sources	Confirmed by 3 manufacturer charts; covers both ISO classes of your grade (K20, K30); no published property data on file for one or both grades, so this rests on the ISO class alone.
Sumitomo ACK3000	K20, K30	3 sources	Confirmed by 3 manufacturer charts; covers both ISO classes of your grade (K20, K30); no published property data on file for one or both grades, so this rests on the ISO class alone.
Sumitomo ACU2500	K20, K30	3 sources	Confirmed by 3 manufacturer charts; covers both ISO classes of your grade (K20, K30); no published property data on file for one or both grades, so this rests on the ISO class alone.
Kyocera PR1510	K20, K30	2 sources	Confirmed by 2 manufacturer charts; covers both ISO classes of your grade (K20, K30); no published property data on file for one or both grades, so this rests on the ISO class alone.
Seco 883	K20, K30	2 sources	Confirmed by 2 manufacturer charts; covers both ISO classes of your grade (K20, K30); no published property data on file for one or both grades, so this rests on the ISO class alone.

More grades at the same ISO range

These also pass the same check (two or more manufacturer charts, at least half of the range), with less evidence than the grades above.

Grade	Shared ISO classes	Evidence	Why it placed here
Seco MK2050	K20, K30	2 sources	Confirmed by 2 manufacturer charts; covers both ISO classes of your grade (K20, K30); no published property data on file for one or both grades, so this rests on the ISO class alone.
Sumitomo BNS8125	K20, K30	2 sources	Confirmed by 2 manufacturer charts; covers both ISO classes of your grade (K20, K30); no published property data on file for one or both grades, so this rests on the ISO class alone.
Tungaloy AH120	K20, K30	2 sources	Confirmed by 2 manufacturer charts; covers both ISO classes of your grade (K20, K30); no published property data on file for one or both grades, so this rests on the ISO class alone.
Tungaloy BX90S	K20, K30	2 sources	Confirmed by 2 manufacturer charts; covers both ISO classes of your grade (K20, K30); no published property data on file for one or both grades, so this rests on the ISO class alone.
Tungaloy BXC90	K20, K30	2 sources	Confirmed by 2 manufacturer charts; covers both ISO classes of your grade (K20, K30); no published property data on file for one or both grades, so this rests on the ISO class alone.

What this does and does not tell you

An ISO 513 application class says which material group and which range of operations a grade is built for. Two grades sharing a class are built for the same job. They are not identical: substrate grain, cobalt content, coating and edge preparation still differ, and so will tool life and the cutting data you should start from. Treat a match here as the shortlist for your own trial, not as a drop-in replacement.

Everything above is derived from the makers' own published application data. Nothing is inferred from price, availability or popularity, and no manufacturer pays to appear here.

Cost check · free · brand-neutral

Are you overpaying on your Mitsubishi MBS140 inserts? Paste your insert list and get a cost audit in about 30 seconds: cross-brand equivalents at the same ISO application position, and where you are likely overpaying. No signup, no sales call.

Run a free cost audit → Check your whole grade list · free

Ask about your own case

Material, operation, machine — get a grade and a starting cutting data set, grounded in the same reference data.