Cooking a steak at 250 F degrees takes around 30 to 35 minutes.
The actual time it takes to cook a steak at 250 F degrees depends on how well done you like your steak.
If you like your steak well done it's gonna take around 35 minutes to cook the steak to well done.
If you like the steak to be medium then the steak should cook in 25 to 30 minutes.
Cooking the steak in the oven is easier because you don't have to flip the steak over and can just place the steak into the oven and set the oven temperature and timer and allow it to cook.
If you cook the steak on the grill you need to flip the steak over every 10 to 20 minutes to allow both sides of the steak to cook fully.
On the grill it takes around 35 minutes to fully cook a steak.