Free-Cutting Steels
Steels with sulphur (and lead) additions, developed for high-speed machining.
Steel & Raw Materials
Free-Cutting Steels
Thanks to the sulphur — and in some grades lead — in their composition, free-cutting steels produce short chips, extend tool life and allow high cutting speeds on CNC lathes and automatic machines.
Supplied as cold-drawn, tight-tolerance (h9 / h11) round, hexagonal and flat bars. An economical solution for serial production of bolts, nuts, fittings, bushings and precision fasteners.
| Grade | Mat. No. | Typical composition (%) | Typical use |
|---|---|---|---|
| 11SMn30 | 1.0715 | C ≤ 0.14 · Mn 0.90–1.30 · S 0.27–0.33 | Fittings, bushings, fasteners |
| 11SMnPb30 | 1.0718 | C ≤ 0.14 · S 0.27–0.33 · Pb 0.20–0.35 | High-speed automatic parts |
| 44SMn28 | 1.0762 | C 0.40–0.48 · Mn 1.30–1.70 · S 0.24–0.33 | Higher-strength parts |
Values are typical ranges from the relevant standards; exact values are provided with the mill certificate of each delivery.
Applications
- Automotive Fasteners
- Hydraulic and Pneumatic Fittings
- Bolts and Nuts
- Bushings and Pins
- Measuring and Optical Device Parts
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