Grade M35 is a premium cobalt-bearing high-speed steel (HSS) widely used for cutting, drilling, milling, and machining applications requiring high wear resistance, red hardness, and toughness. Compared to standard M2 HSS, M35 contains 5% cobalt, which significantly improves hot hardness and strength at elevated temperatures, making it ideal for high-speed cutting of tough and alloyed steels. M35 is widely used in the tool-making, metalworking, and manufacturing industries for precision cutting tools that demand extended service life and resistance to deformation at high temperatures.

Key Properties of M35 HSS

1. Exceptional Hot Hardness & Red Hardness

a. Retains hardness at temperatures up to 650–700°C
b. Typical hardness after heat treatment: 63–65 HRC

2. Superior Wear Resistance

Cobalt and carbides ensure long tool life and resistance to abrasion in high-speed cutting applications.

3. High Toughness

Maintains strength without chipping, ideal for heavy-duty machining and interrupted cuts.

4. Heat Treatable

a. Hardened at 1220–1240°C and tempered multiple times
b. Balanced combination of hardness, toughness, and wear resistance

5. Machinability

Machinable in annealed condition; post-hardening used for drills, end mills, and cutting tools.

Typical Applications of M35 HSS

1. High-performance twist drills, taps, reamers, and milling cutters
2. End mills, broaches, and gear cutting tools
3. Cutting and shaping tools for stainless steel, alloy steels, and high-strength metals
4. Precision industrial cutting tools requiring long service life at high speed
5. Tools for aerospace, automotive, and heavy machinery manufacturing

Why Choose M35 HSS?

M35 High-Speed Steel is the ideal choice for high-performance cutting tools that require maximum wear resistance, toughness, and hot hardness. Its cobalt-enriched composition allows tools to maintain cutting efficiency at higher temperatures and speeds, making it a preferred grade for industrial and precision machining applications.