I had a look through my junk pile and I dont think I have any cast iron among it!
There is some old Triumph Vitesse diff. cases, but is that cast iron? I thought that would be cast steel, what is the practical difference for shop beginners like me? There is a busted chinese vice under the bench, I suppose that would be 'real' cast iron?
I know where I can pick up some fitness 'plates', round weights up to 20Kgs each which I presume are cast iron.
Precis: Cast iron, cast steel, is there a practical difference a my beginner's level?