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

Which carbide insert grades from different manufacturers fall into the same ISO application group (P, M, K, N, S, H). Each record maps one ISO application code (e.g. P20, M30, K10) to the grade designations offered by major insert manufacturers (Sandvik, Kennametal, Mitsubishi, Iscar, Seco, Sumitomo, Tungaloy, Kyocera, Walter, Korloy, and others) as published in their own comparison charts. Answers 'my supplier is out of Sandvik GC4225, what is the Kennametal equivalent in the same P25 class' — the question where assistants confidently generate plausible-looking grade codes that may not exist. These are approximate functional equivalences within an ISO band, not exact substitutions; every source disclaims exact equivalence.

65 records where two or more sources state different values. Both sides are reproduced on the record page, each with its own source and quote.

The data

Where this came from

Every record above links the page it was taken from and quotes the sentence that states it. These are the 2 sources this dataset was assembled from.

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

Machine-readable

• data.jsonThe whole dataset — every record with its source URL and source quote.
• Open Knowledge Format bundleOne JSON object per line — every record's frontmatter and quoted span exactly as it is held here, in one fetch.
• How this is made and checkedWhat "verified against source" does and does not mean.

184 records. last verified against source 2026-08-11. due for re-check by 2028-08-10.

Licence. Factual compilation with source citations. Each manufacturer publishes its own grade classifications freely. Cross-reference charts are published by manufacturers and distributors as sales tools. Facts (which grade sits in which ISO band) cited with short attributed quotes linking back.