高速度鋼

High-Speed Steel (HSS)

High-Speed Tool Steel

Originally developed for machining applications, HSS (notably M2) has found its way into a niche of Japanese woodworking tools — particularly router bits, drill bits, and some specialty plane blades. Its extraordinary hot-hardness is irrelevant for woodworking, but its fine carbide structure and wear resistance make it compelling for specific applications where conventional carbon steel wears prematurely.

Performance Characteristics

Sharpness7/10

Edge Retention9/10

Ease of Sharpening4/10

Rust Resistance5/10

Chemical Composition

carbon0.78–0.88%chromium3.75–4.50%tungsten5.50–6.75%molybdenum4.50–5.50%vanadium1.75–2.20%

Technical Data

Hardness63–67 HRC HRC

Heat TreatmentIndustrial — typically requires furnace treatment

Primary UseRouter bits, drill bits, plane blades (specialist application)

ManufacturerHitachi Metals, OSG Corporation