Mo4.0-V1.1-Cr8-Co5 is a high-speed steel (HSS) variant with elevated molybdenum, vanadium, chromium, and cobalt content, designed to deliver exceptional hardness and heat resistance at cutting temperatures. This composition represents a premium tool steel optimized for demanding machining and metal-cutting applications where thermal fatigue resistance and wear life are critical. Compared to standard M-series high-speed steels, the cobalt addition and elevated refractory element balance make this grade particularly suited to interrupted cuts, abrasive materials, and high-speed finishing operations in aerospace and heavy manufacturing.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Elongation at Break(εf) | 5.000 | - | — | ||
Ultimate Tensile Strength(σUTS) | 308.8 | ksi | — | ||
Yield Strength (0.2% offset)(σy) | 258.8 | ksi | — |