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(11)

EP 3 017 072 A1

(12)

(43) Date of publication: 11.05.2016 Bulletin 2016/19 (21) Application number: 14820539.6 (22) Date of filing: 19.06.2014

(51) International Patent Classification (IPC):  C21D 3/06(2006.01) C21D 8/00(2006.01) C21D 8/02(2006.01) C21D 3/00(2006.01) C21D 7/02(2006.01) C22C 38/40(2006.01) (86) International application number: PCT/FI2014/050496 (87) International publication number: WO 2015/001177 (08.01.2015 Gazette 2015/01)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME (30) Priority: 05.07.2013 FI 20135739 (71) Applicant: Outokumpu Oyj 02200 Espoo (FI)	(72) Inventor: TALONEN, Juho FI-00260 Helsinki (FI) (74) Representative: Aarnio, Hannu Aatto Aulis  Outokumpu Oyj Corporate Affairs and Compliance Riihitontuntie 7 A 02200 Espoo 02200 Espoo (FI)