Steel
for Free cutting
Steel for high-speed mechanical processing
Also called “for high-speed mechanical processing” or “high machinability”, free cutting steel can be easily worked even with the high cutting speeds of automatic machines for chip removal, such as numerical control lathes and machining centres, with high productivity.
In particular, the sulphur present in the steel ensures the fragmentation of the chip, the lead reduces the friction between tool and piece, extending the life of the tools, the tellurium and bismuth further accentuate these characteristics.
Delivery condition and surface
| Delivery Condition | Name | Wire rod | Steel wire |
| Cold drawn | +C | – | x |
| Cold Drawn and Annealed | +C+AC | – | x |
| Cold Drawn then Annealed and Skin passed | +C+AC+LC | – | x |
| Annealed | +AC | x | – |
| Annealed and Cold Drawn | +AC+C | – | x |
| Surface | Wire rod | Steel wire | |
| Bright Steel | – | x | |
| Stearated | – | x | |
| Phosphated | x | x | |
| Polymer | x | x | |
| Pickled | x | – | |
Free cutting steel datasheet
| Ref. | Steel | Standard | EN Classification |
| 1.0718 | 11SMNnPb30 | UNI EN ISO 683-4: 2018 | Non alloy special steel |
| Ref. | Steel | Standard | EN Classification |
| 1.0735 | 11SMn30 | UNI EN ISO 683-4: 2018 | Non alloy special steel |
| Ref. | Steel | Standard | EN Classification |
| 1.0736 | 11SMn37 | UNI EN ISO 683-4: 2018 | Non alloy special steel |
| Ref. | Steel | Standard | EN Classification |
| 1.0737 | 11SMnPb37 | UNI EN ISO 683-4: 2018 | Non alloy special steel |