I have some cuts of beef intended to be used for beef jerky. I have not yet dried them -- the meat is still fresh. I don't know what cut of meat was used.  Can I use it for stir fry? 
Just my own opinion but I think if the cuts are made across the grain rather than with the grain it should be fine. With the grain might be tough to chew. There are 2 camps on cutting jerky meats so it really depends on how it was cut. 