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- Dec 21, 2006
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I am trying to compile a list of the hardness of carbides (and abrasives) commonly found in knife steel and sharpening stones, for my library and future reference, but it's proving to be more challenging than I thought, particularly because the HRC scale usually doesn't go much past 70, and it is the Rockwell C value of carbides I am most interested in. I've cross referenced with given Knoop or Vicker's values on a few of them, but I am seeing contrary data depending on the source. Does anyone have this data and willing to share? I'll post what I have below, some of it doesn't make sense to me, like SiC being harder than VC, that one directly from a Vicker's hardness chart. Thanks for any corrections and input.
Hardness of Alumium Oxide (corundum): approx 82HRC (2035 Vickers)
Hardness of Chromium Carbide (Cr23C6): approx 77HRC (1650 Vickers)
Hardness of Chromium Carbide (Cr7C3): approx 83HRC (2100 Vickers)
Hardness of Tungsten Carbide (WC): approx 84HRC (2400 Vickers)
Hardness of Vanadium Carbide (VC): approx 89HRC (2800 Vickers)
Hardness of Silicon Carbide (SiC) (Crystolon): approx 90HRC (3200 Vickers)
Hardness of Iron Carbide (Cementite): approx 70HRC (1150 Knoop)
Hardness of Moly Carbide (MoC): 75 HRC approx
Hardness of Niobium Carbide (NbC): ? HRC approx
Hardness of Diamond: approx 1 million HRC (ha ha!)
Hardness of Alumium Oxide (corundum): approx 82HRC (2035 Vickers)
Hardness of Chromium Carbide (Cr23C6): approx 77HRC (1650 Vickers)
Hardness of Chromium Carbide (Cr7C3): approx 83HRC (2100 Vickers)
Hardness of Tungsten Carbide (WC): approx 84HRC (2400 Vickers)
Hardness of Vanadium Carbide (VC): approx 89HRC (2800 Vickers)
Hardness of Silicon Carbide (SiC) (Crystolon): approx 90HRC (3200 Vickers)
Hardness of Iron Carbide (Cementite): approx 70HRC (1150 Knoop)
Hardness of Moly Carbide (MoC): 75 HRC approx
Hardness of Niobium Carbide (NbC): ? HRC approx
Hardness of Diamond: approx 1 million HRC (ha ha!)
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