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US 8,540,934 B2Granted
Lead free free-cutting steel and its use
AssigneeSandvik Intellectual Property AB
InventorsMattias Sandström, Ylva Trogen, Lars Karlsson
Life of this patent
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Abstract
A lead free free-cutting steel is described having the following composition in percent by weight: C 0.85-1.2 Si 0.1-0.6 Mn 0.4-1.2 P max 0.05 S 0.04-0.3 Cr max 2 Ni max 1 Mo max 0.5 Cu max 2 Al max 0.1 B max 0.008 Bi+Se+Te max 0.005 Ti+Nb+Zr+V max 0.2 balance Fe and normally occurring impurities. The steel is mainly intended for small/thin dimensions and/or low cutting speeds during manufacture of a product formed of the steel.
Claims22
Lead free steel consisting of the following composition in percent by weight (wt-%):
- C
- 0.85-1.2
- Si
- 0.1-0.4
- Mn
- 0.4-1.2
- P
- max 0.05
- S
- 0.04-0.3
- Cr
- max 2
- Ni
- max 1
- Mo
- max 0.5
- Cu
- max 2
- Al
- max 0.1
- B
- max 0.008
- Bi + Se + Te
- max 0.005
- Ti + Nb + Zr + V
- max 0.2
- balance Fe and normally occurring impurities.
24 more elements
Dependencies are inferred from the claim text.