The rule for lounge acces is a little unclear...
Last week I was flying Cph-Aal on a QI flight, I had seen
this page on the SAS site (in Danish...). Here it says that you as an EBG are allowed to entrance the lounge when flying with any airline partner.
I had a print of the page with me, and it ended up with the (nice) dragon let me in – but she told me that it wasn’t according to the rules but if their website told me that I was allowed entrance – then I could enter.
So be prepared for a little argument and bring a printout of the webpage – then you might get access… but I wouldn’t count on it.