Ferritic stainless steel with improved machinability
US5496515A · kind A · utility
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4References
8Claims
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Key dates
| Filing date | Apr 12, 1995 |
| Grant date | Mar 5, 1996 |
| Priority date | — |
| Expiry date | Apr 12, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C38/60
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Ferritic stainless steel with improved machinability, which can be used especially in the field of screw machining, characterized by the following composition: PA0 C<0.17% PA0 Si<2.0% PA0 Mn<2.0% PA0 Cr[11-20] % PA0 Ni<1.0% PA0 S.ltoreq.0.55% PA0 Ca>30.times.10.sup.-4 % PA0 O>70.times.10.sup.-4 % the Ca/O ratio, between the calcium content and the oxygen content, being given by 0.2<Ca/O<0.6, the said steel being subjected, after rolling and cooling, to an annealing heat treatment giving it a ferritic structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.