Brazed Carbide Fail

There is strong then there is hard..

Hard material breaks under incorrect application where strong material does not give way.

High grade bolts are indeed harder material but they are designed to be strong under tension thus are not hard like tool steel.

They machine well and if one has good dies they can easily be threaded if one needs to add some but that ruins the grade.

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I had all kinds of problems parting, I purchased the inserted carbide parting tool from Shars. It worked out quite well, but it is pretty pricey. I suspect that those cracks are due to stresses set up between the carbide and steel body after the brazing compound hardens and the tool cools. They will probably all be cracked the same way.
 
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