Tool Grade
M4 Steel
High-speed steel (HSS)
Molybdenum-tungsten-vanadium high-speed steel (HSS) that retains its hardness and edge at the high temperatures of high-speed cutting. For long-life cutting tools subject to heavy abrasive wear. Its high vanadium content gives it superior abrasive wear resistance for the most demanding cutting applications.
Main features
Very high abrasive wear resistance
High vanadium content (hard carbides)
Working hardness 63–66 HRC
Standards and equivalents
| SAE / AISI | EN | DIN | JIS |
|---|---|---|---|
| M4 | HS6-5-4 | 1.3351 | SKH54 |
Chemical composition
| % | C | Si | Mn | Cr | Mo | W | V | P | S |
|---|---|---|---|---|---|---|---|---|---|
| Min | 1.25 | 0.20 | 0.15 | 3.75 | 4.25 | 5.25 | 3.75 | — | — |
| Max | 1.40 | 0.45 | 0.40 | 4.75 | 5.50 | 6.50 | 4.50 | 0.030 | 0.030 |
Supply condition
Hot rolledAnnealedAvailable package sizes
Plates3/8" – 2"10 mm – 51 mm
Round bars1/2" – 4"13 mm – 102 mm—
—
Typical applications
- Industrial drill bits
- Taps for threading
- Milling cutters
- Precision reamers
- Cutting broaches
- Gear cutters
- Lathe tools
- Form cutters
- Heading dies
Note: The information and values in this data sheet are provided for reference only and may vary depending on manufacturing, treatment and application conditions. They do not constitute guaranteed specifications, so use and interpretation of this data is the user's responsibility.
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