I have a camshaft that I would like to heatreat to a higher hardness but I do not know what type of iron I am dealing with. It is a camshaft in my Air-cooled VW engine. All cam grinders get their unground billets from the same place in China but none of them know what the material actually is. Is there a way to determine the iron that they are using. If not are there any annealing, normalizing and tempering temps that could be used to get me in the ballpark Any help would be greatly appreciated. Thanks, Chuck
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