| (19) |
 |
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(11) |
EP 0 936 280 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
15.09.1999 Bulletin 1999/37 |
| (43) |
Date of publication A2: |
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18.08.1999 Bulletin 1999/33 |
| (22) |
Date of filing: 16.02.1999 |
|
| (51) |
International Patent Classification (IPC)6: C22C 38/22 |
|
| (84) |
Designated Contracting States: |
|
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
|
Designated Extension States: |
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AL LT LV MK RO SI |
| (30) |
Priority: |
17.02.1998 IT RM980092
|
| (71) |
Applicant: Acciai Speciali Terni S.p.A. |
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05100 Terni (IT) |
|
| (72) |
Inventors: |
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- Barteri, Massimo
00139 Rome (IT)
- Fortunati, Sandro
05100 Terni (IT)
|
| (74) |
Representative: Gervasi, Gemma, Dr. |
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Notarbartolo & Gervasi S.p.A.,
Corso di Porta Vittoria, 9
20122 Milano
20122 Milano (IT) |
|
| |
|
| (54) |
Improved ferritic stainless steel and articles produced therewith |
(57) In the group of AISI 436 LI ferritic stainless steels, a narrow composition is proposed
in which specifically selected alloying elements as well as a Ti and Nb stabilisation,
consent to obtain a monophasic product apt to a plurality of uses, being provided
with high formability and weldability characteristics, good resistance to corrosion,
also localised and in acid condenses, good resistance to oxidation at high temperatures,
to thermal shock and to thermal fatigue, good polishability and absence of aligned
superficial defects.