... 2) Mirror polish 3) Lost wax process 4) Standard:ASTM Lock catch of investment castingSpecification1, investment casting ,precision casting2, carbon steel / alloy ... , FIMA , AP,QP,QA,QC,AOL,RDThe ultimate success of casting design deponds on the communications between the designer and foundry ... a good hole in a casting is dependent on the intergrity of the shell .The ratio of hole diameter to length is ...