Finnish steel maker Outokumpu (<a href="https://www.nasdaqomxnordic.com/aktier/microsite?Instrument=HEX24321&name=Outokumpu%20Oyj&ISIN=FI0009002422" target="_blank">HEL:OUT1V</a>) said today it has decided to increase its stake in an operational 45-MW onshore wind farm of power company Rajakiiri Oy, located near its steel plant in Tornio.