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Differences Between gg and ggg castings

Differences Between gg and ggg castings

Differences Between gg and ggg castings

(OP)
Hi! everybody.

Our customer bring a casting part, and he is saying that the part is ggg casting but we have some doubts. Is there any way or how can I distinguish the differences between a gg casting part and ggg casting part?

Thanks.

RE: Differences Between gg and ggg castings

If the distinction is between a grey iron(GG) and a nodular iron(GGG),use a ring test to identify. A grey iron will not produce a ringing sound when struck,but a nodular iron will. Hope this helps.

" All that is necessary for triumph of evil is that good men do nothing".
Edmund Burke

RE: Differences Between gg and ggg castings

I'd drill a shallow 3/16 diameter hole in a non-critical area of a few sample parts. Within a pretty broad range of alloys drilling grey cast iron makes dust, and drilling ductile iron makes real chips.

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