Hitachi's YXR7 vs Crucible's 3v

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bladeninja

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Mar 26, 2014
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Given YXR7 @ 65 Rockwell and CPM 3V @ 60, (claimed to be optimal for both) and both being high speed tool steels...would you say they are the most closely related steels were seeing in the market today?

Steel composition is relatively close and YXR7 having considerably more Molybdenum and the addition of Tungsten but less Chromium than 3V.

Am I to conclude that they are a very close match and maybe YXR7 is a little tougher but less corrosion resistant than 3V?

Please share your knowledge!
 
I don't think they're similar at all:

YXR7: C .8%, Cr 4.7%, W 1.3%, Mo 5.5%, V 1.3%

3V: C .8%, Cr, 7.5%, W 1.3%, V 2.75%

YXR7 is optimized to attain a high hardness (around 65 hrc) while exhibiting high toughness, where 3V would lose its toughness when approaching 65 hrc.
 
You're correct. CPM 3-V is a tool steel that is not in the high speed steel family. YXR7 looks like an intermediate high speed steel. Closest comparable grade I can find is M-52.
 
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