I have searched to find what is a common material,
and what is an acceptable material for sprue plates.
I have some mold blanks made up, and am working on
sprue plates. I read one company state that they use
1018 steel. Right now I'm using A-2 that is 5/32" thick.
There is some preharden 4140. But it's 5/16" thick, and
would rather not have to mill that down if I don't have to.
Any help or direction would be appreciated.