I am making a ring from scrap 18ct gold which I have melted, cast and rolled. I am experiencing cracking along the length of the piece and annealing is not helping. Result - stress and frustration!

Is this due to quenching after casting?

I suspect that this might be occurring due to the scrap not being of a good quality (although I did test and is definitely 18ct). Any suggestions of what I could try to rectify this?

Thank you for any help offered.