I want to put a steel shaft into an aluminium block so that it won't
move. This is clearly going to involve temperture differentials (hot
ali, cold steel). Ideally I'd warm the ali in the oven when Mrs P is
away and immerse the steel bar in liquid nitrogen. Problem is I have
no liquid nitrogen and I suspect that it'll be an expensive episode if
I use it. Are there cost effective ways to access liquid nitrogen or
alternatively what other ways can I get the steel very cold?
- posted 10 years ago