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Is brazing sufficient for this repair?
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No I think you just found the hinge point for the applied stress. I concur brazing would be sufficient. Keith Rucker just did a video where he brazed a good sized chunk of cast iron to an existing member check it out here: https://www.youtube.com/watch?v=KIj5ij84qlU
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Is there anybody else that thinks the irregularity of the crack and crumbling edges looks like it occurred in "punky" metal. In other words, it looks like there may have been a weak spot in the metal itself. If that's the case, braze may be stronger than what was there originally.
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If you decide to braze, remember that CI absorbs oil like crazy. You may be surprised by the amount that sweats out. When silver brazing CI, I always flux and sweat out the oil at least twice before applying the braze. Hope this helps.
Best Regards,
Bob
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If you braze it you can probably add a little “extra meat” in the form of brazing to more than make up for the decreased strength.
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Brazing will provide more than enough strength and will be less problematic than welding.
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Braze is weaker than the cast iron. Arc welding with nickel, or any other metal, leaves a hard, brittle zone behind the weld. The ideal process would be oxy-acetylene welding using cast iron rod and borax flux.
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Originally posted by danlb View PostAccording to the properties sheets, the tensile strength of ni-rod is close to the cast iron itself. Brazing is a bit (30%) weaker. What caused the failure? Bending? Stretching? Compression?
Dan
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According to the properties sheets, the tensile strength of ni-rod is close to the cast iron itself. Brazing is a bit (30%) weaker. What caused the failure? Bending? Stretching? Compression?
Dan
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Is brazing sufficient for this repair?
Cracked vise nut. Cast iron. I was just going to braze it. Would there be any advantage to using Ni-Rod instead?
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