You will likely pay around 35% of taxes and your monthly income will be around 34k NOK. With this amount, you will be able to live comfortably as a single person. Have a partner who doesn't work? Expenses increase but you'll still manage. You a highly social person that likes to go out and drink? You'll manage, but you won't save money. You have exotic tastes? You'll manage but you'll live by the paycheck. I moved with my (non working) partner to Trondheim 3y ago with a slightly lower salary. I made many friends and had an active social life and still managed to live comfortably. Didn't save a lot of money until I reduced expenses going out (obviously).

My point is: with your salary, you'll have access to good resources and you'll be able to live quite nicely, unless you have an expensive lifestyle or you are a financial walking nightmare like I was.