... craft:lost wax process 3) mirror ,electro-polish invesment castingSpecification1, investment casting ,precision casting2, carbon steel / alloy steel /stainless steel3 ... a normalize or anneal All 300 series stainless steel an 17-4PH are quoted with a solution anneal7,GagingWe ... .However ,this is generally not required on production commercial investment casting ; Doing so well add cost ,the following non ...