In school we came across "mystery" metal...came from a cheap little Chinese no name dirt bike engine. The piece cracked and we decide to use it in the lab to see what the spectro analysis was. It fell into nothing technically. The make up of the steel wasn't anywhere where it should have been. Having said that I could see the part being made with Chinese steel. Regardless of where the engineering or assembly took place. I also can see the part being hardened is there a possibility that there was a error in the hardening process therefore actually causing the part to become brittle?
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