Is this a crack in material 321? What’s the reason? Please have the experts take a look
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The rod was first rounded using a wire cutting machine, and then taken to a lathe. After machining it, tiny crack-like defects were found everywhere; these defects were still present even after machining 4–5 mm. The inner surface was also polished, but the same issue persisted； Moreover, the chip generation during machining with this material is much higher than that with 304; I don’t usually work with 321, so I’m not sure if this is normal ? The image is below
It’s compressed too much; send a few clear ones
All items have been returned, and a claim has been filed for processing fees, delay fees, shipping costs, etc. Thank you all for your responses
Mm. Problems should be resolved promptly once they are identified.
Substandard products. The return is correct.