spliting metal

Now I am new and this is my second post and I am learning things very quickly I have searched this site for information on what I am asking but cannot find anything what I want to know! That is should I split my steel and iron and cans etc or put them all together and is alloy aluminium? may seem stupid questions to the more experienced I know but please be gentle with me I also I know to split my copper but do I put bright thin wire striped from insulation separate to thicker lead pencil thick copper and again split both from copper pipes, thanks for helping me and remember I am no threat to any of you as I am in the uk

Check with your yard and see how they want it separated. Every yard is different and probably is that way on that side of the pond too.