Which carbide grades from other manufacturers are equivalent to Walter WKK20S?

Walter WKK20S sits at ISO 513 K15, K20. Grades from other makers at the same application position, each supported by two or more manufacturer-published comparison charts: Mitsubishi MC5015 (K15, K20; 2 manufacturer charts); Mitsubishi UC5115 (K15, K20; 2 manufacturer charts); Sumitomo AC4015K (K15, K20; 2 manufacturer charts); TaeguTec TT7015 (K15, K20; 2 manufacturer charts); Tungaloy KS15F (K15, K20; 2 manufacturer charts); Tungaloy T5115 (K15, K20; 2 manufacturer charts); Tungaloy T515 (K15, K20; 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 Walter WKK20S 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

Walter WKK20S 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.

Walter WKK20S sits at ISO 513 application classes K15, K20 — cast iron. 7 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

7 grades from other makers cover every one of WKK20S'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
Mitsubishi MC5015	K15, K20	2 sources	Confirmed by 2 manufacturer charts; covers both ISO classes of your grade (K15, K20); no published property data on file for one or both grades, so this rests on the ISO class alone.
Mitsubishi UC5115	K15, K20	2 sources	Confirmed by 2 manufacturer charts; covers both ISO classes of your grade (K15, K20); no published property data on file for one or both grades, so this rests on the ISO class alone.
Sumitomo AC4015K	K15, K20	2 sources	Confirmed by 2 manufacturer charts; covers both ISO classes of your grade (K15, K20); no published property data on file for one or both grades, so this rests on the ISO class alone.
TaeguTec TT7015	K15, K20	2 sources	Confirmed by 2 manufacturer charts; covers both ISO classes of your grade (K15, K20); no published property data on file for one or both grades, so this rests on the ISO class alone.
Tungaloy KS15F	K15, K20	2 sources	Confirmed by 2 manufacturer charts; covers both ISO classes of your grade (K15, K20); 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
Tungaloy T5115	K15, K20	2 sources	Confirmed by 2 manufacturer charts; covers both ISO classes of your grade (K15, K20); no published property data on file for one or both grades, so this rests on the ISO class alone.
Tungaloy T515	K15, K20	2 sources	Confirmed by 2 manufacturer charts; covers both ISO classes of your grade (K15, K20); 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.

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