cast iron

List -

I've got some questions about some castings I'll be having made soon. There
was recently some mention of aging the cast iron before machining, and I'm
wondering, how long one should let it age? Is it a thermal issue? Also,
how common and important is stress-relieving for parts that will only be
lightly machined? Several of the foundries I've spoken with said that
stress-relieving was not a "must", but mostly for troublesome parts.

Thanks in advance,

Carlos Guillermo
VERVE Engineering & Design