High-Speed Steel (HSS) vs Aogami #1

Detailed metallurgical comparison between High-Speed Tool Steel and Blue Paper Steel #1.

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.

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

Sharpness

7

Edge Retention

9

Ease of Sharpening

4

Rust Resistance

5

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High-carbon steel alloyed with chromium and tungsten for enhanced wear resistance and edge retention. Ideal for hard woods and heavy use. Forged by masters who prize its demanding nature, it rewards a skilled sharpener with extraordinary edges that outlast almost any other carbon steel.

carbon1.25–1.35%chromium0.30–0.50%tungsten1.50–2.00%

Sharpness

9

Edge Retention

9

Ease of Sharpening

6

Rust Resistance

4

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