This is a high-speed steel (HSS) variant optimized for extreme cutting and forming operations, distinguished by its high molybdenum and vanadium content combined with significant cobalt addition. Commonly found in precision cutting tools—end mills, drills, reamers, and broaches—where it delivers superior hot hardness and wear resistance compared to standard M-series high-speed steels. The cobalt boost enhances red hardness (strength retention at elevated temperatures), making it the choice for aggressive machining of cast iron, stainless steel, and aerospace alloys where tool life and cutting speed are critical cost drivers.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Elongation at Break(εf) | 4.000 | - | — | ||
Ultimate Tensile Strength(σUTS) | 304.8 | ksi | — | ||
Yield Strength (0.2% offset)(σy) | 261.8 | ksi | — |