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is a knife made out of CPM-S30V any good?
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<blockquote data-quote="ez bake" data-source="post: 2625927" data-attributes="member: 229"><p>S30V does tend to wear from a razor edge to a "working edge" rather quickly though - the working edge will typically last for quite a long time and you can usually strop it back to razor-sharp with little effort but in all the knives I've owned, I've found that the softer the Rockwell hardness, the quicker it loses that razor edge. </p><p></p><p>Compared to 154CM / VG10, it's still a longer overall edge-retention, but when you get to any number of fancier steels out there, it starts to show quickly (chop up some Pico De Gaio against a cutting board for a while and you really notice when the tomatoes aren't so easy to slice anymore but your knife is still sharp enough to cut stuff with it's working edge - D2, ELMAX, or CTS-XHP will outlast S30V in that initial razor sharp edge-retention). </p><p></p><p>I personally prefer the softer S30V / S35VN to the harder stuff as I've had edge-chips in S30V knives before and it's kind of a pain to get them out (usually takes a couple of sharpenings because I don't like removing that much metal unless I have to). I'd rather get a roll or bend in the edge and be able to get it out than have the extra few cuts of edge-retention to be honest. </p><p></p><p>You can make the inital razor-edge-retention last a bit longer with edge-geometry and a secondary bevel (or even a tertiary if you've got the skills/tools). I take my S30V edges out as wide as I can (I've got to look in my sharpening notebook, but I think my PM2 is at 19 degrees per side with a secondary micro-bevel at 21 per side).</p><p></p><p>Here's Ankerson's famous manila rope cutting test for how specific knives with various heat-treatment did (Note the S30V at 60 Rockwell in category 5 where as the S30V in 58.5 ends up down in Category 7):</p><p></p><p><a href="http://www.bladeforums.com/forums/showthread.php/793481-Ranking-of-Steels-in-Categories-based-on-Edge-Retention-cutting-5-8-quot-rope" target="_blank">http://www.bladeforums.com/forums/showthread.php/793481-Ranking-of-Steels-in-Categories-based-on-Edge-Retention-cutting-5-8-quot-rope</a></p></blockquote><p></p>
[QUOTE="ez bake, post: 2625927, member: 229"] S30V does tend to wear from a razor edge to a "working edge" rather quickly though - the working edge will typically last for quite a long time and you can usually strop it back to razor-sharp with little effort but in all the knives I've owned, I've found that the softer the Rockwell hardness, the quicker it loses that razor edge. Compared to 154CM / VG10, it's still a longer overall edge-retention, but when you get to any number of fancier steels out there, it starts to show quickly (chop up some Pico De Gaio against a cutting board for a while and you really notice when the tomatoes aren't so easy to slice anymore but your knife is still sharp enough to cut stuff with it's working edge - D2, ELMAX, or CTS-XHP will outlast S30V in that initial razor sharp edge-retention). I personally prefer the softer S30V / S35VN to the harder stuff as I've had edge-chips in S30V knives before and it's kind of a pain to get them out (usually takes a couple of sharpenings because I don't like removing that much metal unless I have to). I'd rather get a roll or bend in the edge and be able to get it out than have the extra few cuts of edge-retention to be honest. You can make the inital razor-edge-retention last a bit longer with edge-geometry and a secondary bevel (or even a tertiary if you've got the skills/tools). I take my S30V edges out as wide as I can (I've got to look in my sharpening notebook, but I think my PM2 is at 19 degrees per side with a secondary micro-bevel at 21 per side). Here's Ankerson's famous manila rope cutting test for how specific knives with various heat-treatment did (Note the S30V at 60 Rockwell in category 5 where as the S30V in 58.5 ends up down in Category 7): [url]http://www.bladeforums.com/forums/showthread.php/793481-Ranking-of-Steels-in-Categories-based-on-Edge-Retention-cutting-5-8-quot-rope[/url] [/QUOTE]
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