A friend of mine asked me to convert 50 oz of deox sterling silver
castings into plate. I worked this just like I normally do for
sterling. Melt the castings and pour the ingot, pickle, and dry.
Then I hammer the ingot lightly on both sides with a ball peen
hammer and anneal. Then I begin the rolling and anneal as necessary.
The problem is that after two or three passes through the mill I
notice spots in the ingot that are cracking. It is like they were
in the ingot from the beginning, not like cracking on the edges from
too much rolling before annealing. Any thoughts? Has anyone had
experience with this? Thanks.