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High Carbon or Case Hardened


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I have several requests for farrier rasp chefs knives…..I forgot how to tell if there case hardened or good to go high carbon steel.

 

Thanks for any advice.

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Cut off a piece from the end and heat it up to non-magnetic and soak for about a minute then plunge in water. If it shatters then it's high carbon. If it doesn't shatter place it on an anvil and strike it with a hammer. If it shatters then it's high carbon. If it doesn't then I would expect that it was case hardened and doesn't have enough carbon in it to harden to any degree.

 

Doug

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Cut off a piece from the end and heat it up to non-magnetic and soak for about a minute then plunge in water. If it shatters then it's high carbon. If it doesn't shatter place it on an anvil and strike it with a hammer. If it shatters then it's high carbon. If it doesn't then I would expect that it was case hardened and doesn't have enough carbon in it to harden to any degree.

 

Doug

 

Thanks,Doug

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Etching would tell you whether it was case hardened or not.

Good point! Grind a clean spot, polish, and etch. A case will show up. Might have to use nital, but ferric may work.

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