You *CAN*, but just because you can doesn't mean you should.
Work boots or whatever is fine but just keep in mind that the steel inside gets hot, really fast. I've had the pleasure (or displeasure) of having to work outside in the summer with steel toes. Trust me it's not very fun at all. If at all possible get a composite toe boot, you'll thank me for it.
Personally I use hiking boots. They're McKinleys that I got for ~$90 on sale from SportMart or Coast Mountain Sports (SportChek). They've served me well for the last 5 years, and this is with semi regular use (winter, hiking, garden work/home improvement, etc.). Composite toe, steel shank in sole (to prevent nail from puncturing sole), high top (good ankle rolling protection).
ಠ_ಠLess QQ more Pew Pew
READY TO >> RACE