Yes, at least my grinder do it. Anything can be nitrated... for cam it did cost ~80e, cost is coming from weight so crank could be bit costly. But at least my experience fir nitrated cam was bad. I only drive 200km with good oil and I was allready started to penetrate trough nitrated part (they did fix it with out cost).
Crank is different story and If I remeber right 505 diesel engine cranks were nitraed.
V-M