competition results on performances of different types of steel

some translation：

from the hardest to the easiest when resharpening

1, M390(CTS-204P is almost equal to it) , please never change the shape of the blade because you will regret it!!

2, TYPE-X,real hard to resharpen and I have talked about it before without exaggeration.It really consumes knife stone.

3, CPM-M4 ,it is much easier to resharpen than the two mentioned above when using a rough knife stone.
But when using a smooth knife stone with a grade of more than 3000, it is pretty hard to grind metal off the edge.
It took me quite a long time to make the blade edge very sharp.


4, CPM3V and V4 are in the middle grade. Not so hard but neither too easy. It is efficient to maintain them with a rough knife stone. When using a smooth knife stone it is easier than M4.

5, ZDP-189 is in high hardness but easy to resharpen. Only polishing with a smooth knife stone took me some time.
My ZDP-189 knives always perform well in cutting tests so there could be no issue with them in the hardness aspect.


6, N77 surprised me that it is very easy to resharpen and gets extremely sharp when using an over 1000 grade kinfe stone ,so it is kinda like VG-10.
As a traditional stainless steel , 154CM does not hold the edge well but is very easy to resharpen.I usually rub it slightly with a knife stone for several times after using and that is enough to make it sharp again.
 
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Could you give some info about this knife?

IMG_0905.jpg
 
Waterbeef, thank you for taking the time to answer our questions. It's an interesting set of tests with a couple of steels we don't see much of, and one I've never heard of.

The type X seems like a very wear resistant steel. It's good seeing other than the 8C, and 9C steels we are used to seeing coming out of China. We knew they had to be there, but finding them is difficult especially if you don't know what you are looking for. The Foundry websites, or steel wholesalers typically have the ASI, and JIS steels listed, but not the steels like the Type X.

I figured steels like that, and all other types would be available as China does the same manufacturing processes as everybody else.

If you get more info please share. Thanks,

Joe
 
Funny there is no global main website of the Bolher-Uddeholm group ;)

I think the heat threat is very important; when I read this review vandadis 4E seems to be on a higher ranking ;)
 
as i noted in a test i did, my banchmade ambush held a shaving edge through about 75 feet of paperboard, my spyderco stretch laster over 300. my tenacious held for about 95. all of them stropped back to shaving, so perhaps i was doing an edge stability test rather than abrasion resistance
 
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