CPM M4
Crucible Particle Metallurgy high-speed steel with exceptionally high vanadium (4%) and carbon (1.42%) content. Combines the red hardness of M2 HSS with wear resistance approaching carbide. PM process ensures uniform fine carbide distribution impossible in conventional melting. Hardened to 62–66 HRC. Used for end mills, broaches, hobs, form tools, cold heading dies, slitter knives and applications where conventional HSS wears too fast but carbide is too brittle. Popular in knife community for extreme edge retention.
Mechanical properties — Pro
Annealed
| Property | Value | Unit |
|---|---|---|
| Hardness HB |
Hardened + Tempered
| Property | Value | Unit |
|---|---|---|
| Hardness HRC |
General
| Property | Value | Unit |
|---|---|---|
| Density |
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