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What is VPN hardness?

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  1. Your right sorry, 350 VPN is equivelant to 400 rockwell C.

     


  2. no, this is wrong. It's Vickers Hardness, and is equivelant to 400 rockwell C. (this is not the pyrimid number)

     


  3. no, this is wrong. It's Vickers Hardness, and is equivelant to 400 rockwell C. (this is not the pyrimid number)


  4. how much rockwell c of 350 VPN Hardness


  5. It is a Vickers hardness test  - The unit of hardness given by the test is known as the Vickers Pyramid Number (HV).
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