This table lists the ISO application class each Walter grade is positioned at, per manufacturer-published grade comparison charts in the grade_equivalence reference database. Positioning at the same ISO class does not mean grades are interchangeable between manufacturers — substrate, coating and edge preparation still differ, even at the same class.
| Grade | ISO class | Coated | Verification tier |
|---|---|---|---|
| WKP01G | P05 | Yes | Tier 1 |
| WPP05 | P05 | Yes | Tier 1 |
| WPP05G | P05 | Yes | Tier 2 |
| WPP05S | P05 | Yes | Tier 1 |
| WSM01 | P05 | Yes | Tier 1 |
| Grade | ISO class | Coated | Verification tier |
|---|---|---|---|
| WCE10 | P10 | — | Tier 1 |
| WHH15X | P10 | — | Tier 1 |
| WKP25 | P10 | Yes | Tier 2 |
| WKP25S | P10 | Yes | Tier 1 |
| WKP35G | P10 | Yes | Tier 1 |
| WKP35S | P10 | Yes | Tier 1 |
| WPP10 | P10 | Yes | Tier 1 |
| WPP10G | P10 | Yes | Tier 2 |
| WPP10S | P10 | Yes | Tier 2 |
| WSM10 | P10 | — | Tier 1 |
| Grade | ISO class | Coated | Verification tier |
|---|---|---|---|
| WKP13S | P15 | Yes | Tier 1 |
| WPP10G | P15 | Yes | Tier 1 |
| WPP10S | P15 | Yes | Tier 1 |
| Grade | ISO class | Coated | Verification tier |
|---|---|---|---|
| WKP25 | P20 | Yes | Tier 2 |
| WKP25S | P20 | Yes | Tier 1 |
| WKP35G | P20 | Yes | Tier 1 |
| WKP35S | P20 | Yes | Tier 2 |
| WPP20 | P20 | Yes | Tier 1 |
| WPP20G | P20 | Yes | Tier 2 |
| WPP20S | P20 | Yes | Tier 2 |
| WSM20 | P20 | — | Tier 1 |
| WTA41 | P20 | — | Tier 1 |
| WTA43 | P20 | — | Tier 1 |
| Grade | ISO class | Coated | Verification tier |
|---|---|---|---|
| WPP20G | P25 | Yes | Tier 1 |
| WPP20S | P25 | Yes | Tier 1 |
| WSM21 | P25 | Yes | Tier 1 |
| Grade | ISO class | Coated | Verification tier |
|---|---|---|---|
| WKP23S | P30 | Yes | Tier 1 |
| WKP30S | P30 | Yes | Tier 1 |
| WKP35G | P30 | Yes | Tier 1 |
| WPP30 | P30 | Yes | Tier 1 |
| WPP30G | P30 | Yes | Tier 2 |
| WPP30S | P30 | Yes | Tier 2 |
| WSP45S | P30 | — | Tier 1 |
| Grade | ISO class | Coated | Verification tier |
|---|---|---|---|
| WPP30G | P35 | Yes | Tier 1 |
| WPP30S | P35 | Yes | Tier 1 |
| Grade | ISO class | Coated | Verification tier |
|---|---|---|---|
| WSP45 | P40 | — | Tier 2 |
| WSP45G | P40 | — | Tier 1 |
| WSP45S | P40 | — | Tier 1 |
| Grade | ISO class | Coated | Verification tier |
|---|---|---|---|
| K68 | M10 | — | Tier 1 |
| KYSM10 | M10 | — | Tier 1 |
| WAM10 | M10 | Yes | Tier 1 |
| WSM01 | M10 | Yes | Tier 1 |
| Grade | ISO class | Coated | Verification tier |
|---|---|---|---|
| WMP20S | M15 | — | Tier 1 |
| WSM20S | M15 | — | Tier 1 |
| Grade | ISO class | Coated | Verification tier |
|---|---|---|---|
| K68 | M20 | — | Tier 1 |
| WAM20 | M20 | — | Tier 1 |
| WMP20S | M20 | Yes | Tier 1 |
| WMP45G | M20 | Yes | Tier 1 |
| WSM10S | M20 | Yes | Tier 1 |
| WSM20S | M20 | — | Tier 2 |
| WSM45X | M20 | Yes | Tier 1 |
| Grade | ISO class | Coated | Verification tier |
|---|---|---|---|
| WAM20 | M30 | Yes | Tier 1 |
| WAM30 | M30 | — | Tier 1 |
| WSM20S | M30 | Yes | Tier 1 |
| WSM21 | M30 | Yes | Tier 1 |
| Grade | ISO class | Coated | Verification tier |
|---|---|---|---|
| WSM20S | M35 | Yes | Tier 1 |
| WSM21 | M35 | Yes | Tier 1 |
| Grade | ISO class | Coated | Verification tier |
|---|---|---|---|
| WSM30S | M40 | Yes | Tier 1 |
| WSP45 | M40 | — | Tier 2 |
| WSP45G | M40 | — | Tier 1 |
| WSP45S | M40 | — | Tier 1 |
| Grade | ISO class | Coated | Verification tier |
|---|---|---|---|
| K115M | K01 | — | Tier 1 |
| K68 | K01 | — | Tier 1 |
| Grade | ISO class | Coated | Verification tier |
|---|---|---|---|
| WKK10S | K05 | Yes | Tier 2 |
| WKP01G | K05 | Yes | Tier 2 |
| Grade | ISO class | Coated | Verification tier |
|---|---|---|---|
| WAK10 | K10 | Yes | Tier 2 |
| WHH15X | K10 | — | Tier 1 |
| WKK10S | K10 | Yes | Tier 1 |
| WKK20S | K10 | Yes | Tier 1 |
| WKP01G | K10 | Yes | Tier 1 |
| WKP25S | K10 | Yes | Tier 1 |
| WNN10 | K10 | Yes | Tier 1 |
| WXM15 | K10 | — | Tier 2 |
| Grade | ISO class | Coated | Verification tier |
|---|---|---|---|
| WAK20 | K15 | Yes | Tier 1 |
| WKK20S | K15 | Yes | Tier 1 |
| Grade | ISO class | Coated | Verification tier |
|---|---|---|---|
| MK3000 | K20 | — | Tier 1 |
| WAK20 | K20 | Yes | Tier 2 |
| WAK30 | K20 | Yes | Tier 2 |
| WKK20S | K20 | Yes | Tier 2 |
| WKP25S | K20 | Yes | Tier 1 |
| WKP30S | K20 | Yes | Tier 1 |
| WKP35G | K20 | Yes | Tier 1 |
| WKP35S | K20 | Yes | Tier 2 |
| Grade | ISO class | Coated | Verification tier |
|---|---|---|---|
| WK1 | N10 | — | Tier 1 |
| Grade | ISO class | Coated | Verification tier |
|---|---|---|---|
| WN23 | N20 | No | Tier 1 |
| Grade | ISO class | Coated | Verification tier |
|---|---|---|---|
| WSM01 | S05 | Yes | Tier 1 |
| Grade | ISO class | Coated | Verification tier |
|---|---|---|---|
| K68 | S10 | — | Tier 1 |
| WSM01 | S10 | — | Tier 2 |
| WSM10S | S10 | — | Tier 2 |
| Grade | ISO class | Coated | Verification tier |
|---|---|---|---|
| WSM10S | S15 | Yes | Tier 1 |
| Grade | ISO class | Coated | Verification tier |
|---|---|---|---|
| K110M | S20 | — | Tier 1 |
| WSM20S | S20 | — | Tier 2 |
| WSM21 | S20 | Yes | Tier 1 |
| WSM30S | S20 | — | Tier 2 |
| Grade | ISO class | Coated | Verification tier |
|---|---|---|---|
| WSM20S | S25 | Yes | Tier 1 |
| WSM21 | S25 | Yes | Tier 1 |
| Grade | ISO class | Coated | Verification tier |
|---|---|---|---|
| WSM30S | S30 | Yes | Tier 1 |
Source: manufacturer grade-comparison charts, ingested into the grade_equivalence reference table with page-level provenance. Rows with no verification (tier 0, model-only) are excluded from this table.
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Download the Kennametal Carbide Grade Chart (PDF, free sample)19 cross-referenced pairs in the dataset involve Walter — each appears in two or more published cross-reference charts from tooling manufacturers, with no conflicting source found on review.