33gg20

Machining Cast Iron GG20. GG20 is a Grey cast iron material with a Machinability rating of 127% and Hardness 205 HB. Grey cast Iron is the most britle cast iron sub-group. It is the easiest to machine and produces tiny chips even when using a flat insert without a chip breaker. In Cast Iron, the material standards also define the allowed ... poipet 12 live draw