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 Post subject: HAP40
PostPosted: Fri Jul 05, 2013 2:13 pm 

Joined: Thu Mar 21, 2013 3:37 pm
Posts: 3
Hello all,

I have a question on sharpening HAP40 steel and maybe someone can help.

Recently, I bought a GIHEI knife (210 mm Gyuto, san mai with HAP40 steel). It's a nice knife, but OOTB not super-sharp.

I do my sharpening with a Belgian blue stone and Naniwa Super (800/5000). Afterwards some stropping on leather and blue polishing paste. This works well with my other knives (Global and an Eden Blue#2).

The HAP40 takes forever to be only slightly affected by this. On the one hand very impressive but not convenient.

Am I using the wrong stone or should I be more patient?

I am also thinking about stropping on balse with CBN, but before investing I'd like to know if this is a good idea with HAP40.

Really looking forward to hear opinions,

Vranc


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 Post subject: Re: HAP40
PostPosted: Fri Jul 05, 2013 10:54 pm 
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Location: USA... mostly.
VRANC <> I've never dealt with the steel, but when dealing with wear resistant steels like it or M390... diamonds are your friend. Get your edge on the diamond, then finish with stones.

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 Post subject: Re: HAP40
PostPosted: Sun Jul 07, 2013 9:43 am 

Joined: Thu Mar 21, 2013 3:37 pm
Posts: 3
Thanks for the advice. Sounds logical. What grit size(s) would i need to do this?


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 Post subject: Re: HAP40
PostPosted: Sun Jul 07, 2013 8:53 pm 
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Location: Madison Wisconsin
It's up to you. The 140 will make short work of most things. You can move up to the 600 from there and then switch to a 1K stone and work your way up as far as you like from there.



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