ISO M — Stainless Steel · M30
M30 — PH stainless (17-4PH)
Hardness range: 28–44 HRC. Part of the ISO M — Stainless Steel group. Stainless steel presents work-hardening as the main challenge. Austenitic grades (304, 316L) built-up-edge and notch-wear rapidly. Positive, sharp geometry with high-pressure coolant at 15–20 bar is standard. Consistent depth of cut prevents re-cutting the hardened chip ramp.
Material profile — M30
- ISO designation
- M30 (ISO M — Stainless Steel)
- Material
- PH stainless (17-4PH)
- Hardness
- 28–44 HRC
- ISO group colour
- Stainless Steel
Tooling guidance — M-group
- Group summary
- Work hardening is the main challenge. Sharp positive geometry, high-pressure coolant 15–20 bar, consistent DOC.
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