Spyderco Forums

Hi Sal and everyone, was just wondering what the HRC is running at on the new K390 line from Seki factory. I got a new Delica in K390 and me and a few people were trying to find out what the actual numbers were if you don't mind sharing specifics. I tried looking around but haven't found anything.
Cheers.

The only Seki K390 I know of that's been tested so far is the Police 4. Three different examples tested at 64.2, 65.2 and 65.5.

https://docs.google.com/spreadsheets/d/ ... 0iEWrdJGU/

Accutron wrote: ↑

Sat Nov 14, 2020 5:07 pm

The only Seki K390 I know of that's been tested so far is the Police 4. Three different examples tested at 64.2, 65.2 and 65.5.

https://docs.google.com/spreadsheets/d/ ... 0iEWrdJGU/

I wonder if the new ones are the same, same factory so it might be similar levels, I was guessing it was high, mine is still shaving hairs 3 weeks in.
Cheers.

(Re: HRC Database
Postby EngDevGr3 » Tue Sep 01, 2020 8:06 pm

I just got a Delica k390. The results were a bit surprising. It was poked twice, with the results of 66.4 and 66.5 HRC)

I found this in the HRC Database thread.

I recall the days when everything was run at rc 58-59. Even when new steels were used they were not heat treated to bring out their best performance. Heck if they are rc 62 or above I'm more than happy.

Joe

Buddafucco wrote: ↑

Sat Nov 14, 2020 5:51 pm

(Re: HRC Database
Postby EngDevGr3 » Tue Sep 01, 2020 8:06 pm

I just got a Delica k390. The results were a bit surprising. It was poked twice, with the results of 66.4 and 66.5 HRC)

I found this in the HRC Database thread.

Thanks you, that's the info I was looking for. it seems like a test from the newest recent batch as well, from the same batch I have, nice.

Buddafucco wrote: ↑

Sat Nov 14, 2020 5:51 pm

(Re: HRC Database
Postby EngDevGr3 » Tue Sep 01, 2020 8:06 pm

I just got a Delica k390. The results were a bit surprising. It was poked twice, with the results of 66.4 and 66.5 HRC)

I found this in the HRC Database thread.

Wow, that's good!

I just hope the upcoming P4 LW K390 will also be heat treated the same...couldn't find a good P4 G-10 nowadays.

Can't wait for my Endela! I think this is one of the best new steels in awhile.

Hi Londinium Armoury,

We always try for optimal working hardness for the steel we're using..

sal

nerdlock wrote: ↑

Sat Nov 14, 2020 8:43 pm

Buddafucco wrote: ↑

Sat Nov 14, 2020 5:51 pm

(Re: HRC Database
Postby EngDevGr3 » Tue Sep 01, 2020 8:06 pm

I just got a Delica k390. The results were a bit surprising. It was poked twice, with the results of 66.4 and 66.5 HRC)

I found this in the HRC Database thread.

Wow, that's good!

I just hope the upcoming P4 LW K390 will also be heat treated the same...couldn't find a good P4 G-10 nowadays.

Yeah, i missed out on the P4 g10 k390. I haven't had any luck finding a nice used one either.

nerdlock wrote: ↑

Sat Nov 14, 2020 8:43 pm

Buddafucco wrote: ↑

Sat Nov 14, 2020 5:51 pm

(Re: HRC Database
Postby EngDevGr3 » Tue Sep 01, 2020 8:06 pm

I just got a Delica k390. The results were a bit surprising. It was poked twice, with the results of 66.4 and 66.5 HRC)

I found this in the HRC Database thread.

Wow, that's good!

I just hope the upcoming P4 LW K390 will also be heat treated the same...couldn't find a good P4 G-10 nowadays.

This seems overhardened, particularly with the Delica's thin blade stock. Bohler's maximum recommended hardness is 64 HRC. K390's toughness isn't fantastic anyway, and at 66.5 HRC, it's getting down near Maxamet.

After the abuse Shawn has put his k390 police through, it looks plenty durable to me

Accutron wrote: ↑

Sat Nov 14, 2020 10:22 pm

nerdlock wrote: ↑

Sat Nov 14, 2020 8:43 pm

Buddafucco wrote: ↑

Sat Nov 14, 2020 5:51 pm

(Re: HRC Database
Postby EngDevGr3 » Tue Sep 01, 2020 8:06 pm

I just got a Delica k390. The results were a bit surprising. It was poked twice, with the results of 66.4 and 66.5 HRC)

I found this in the HRC Database thread.

Wow, that's good!

I just hope the upcoming P4 LW K390 will also be heat treated the same...couldn't find a good P4 G-10 nowadays.

This seems overhardened, particularly with the Delica's thin blade stock. Bohler's maximum recommended hardness is 64 HRC. K390's toughness isn't fantastic anyway, and at 66.5 HRC, it's getting down near Maxamet.

Steel foundry HT recommendations are generally for applications other than knives.
I'm stoked to hear that it's being run as hard as it is. I run my K390 Police at around 9~10 dps and it's tough enough for EDC even at that extreme angle.

The Meat man wrote: ↑

Sun Nov 15, 2020 2:13 pm

Accutron wrote: ↑

Sat Nov 14, 2020 10:22 pm

nerdlock wrote: ↑

Sat Nov 14, 2020 8:43 pm

Buddafucco wrote: ↑

Sat Nov 14, 2020 5:51 pm

(Re: HRC Database
Postby EngDevGr3 » Tue Sep 01, 2020 8:06 pm

I just got a Delica k390. The results were a bit surprising. It was poked twice, with the results of 66.4 and 66.5 HRC)

I found this in the HRC Database thread.

Wow, that's good!

I just hope the upcoming P4 LW K390 will also be heat treated the same...couldn't find a good P4 G-10 nowadays.

This seems overhardened, particularly with the Delica's thin blade stock. Bohler's maximum recommended hardness is 64 HRC. K390's toughness isn't fantastic anyway, and at 66.5 HRC, it's getting down near Maxamet.

Steel foundry HT recommendations are generally for applications other than knives.
I'm stoked to hear that it's being run as hard as it is. I run my K390 Police at around 9~10 dps and it's tough enough for EDC even at that extreme angle.

Precisely. Additionally, a steels working hardness can change based on a particular heat treat. So the foundries general recommendations, nor their recommended heat treat is tailored for cutlery.

Is the delica 4 "slicy-er" than the endura 4/police 4?

GarageBoy wrote: ↑

Sun Nov 15, 2020 5:54 pm

Is the delica 4 "slicy-er" than the endura 4/police 4?

The Delica has slightly thinner blade stock, so possibly a little, but the primary grind is probably the same.

GarageBoy wrote: ↑

Sun Nov 15, 2020 5:54 pm

Is the delica 4 "slicy-er" than the endura 4/police 4?

I'd say yes. The Delica has thinner stock, and while the Delica isn't as thin behind the edge as one might expect, most P4s I've seen/heard about came a little thicker bte than the typical 20 thousandths on inch you usually see. I ended up thinning/convexing my edge a little by hand, and it cuts great now.

Accutron wrote: ↑

Sat Nov 14, 2020 10:22 pm

nerdlock wrote: ↑

Sat Nov 14, 2020 8:43 pm

Buddafucco wrote: ↑

Sat Nov 14, 2020 5:51 pm

(Re: HRC Database
Postby EngDevGr3 » Tue Sep 01, 2020 8:06 pm

I just got a Delica k390. The results were a bit surprising. It was poked twice, with the results of 66.4 and 66.5 HRC)

I found this in the HRC Database thread.

Wow, that's good!

I just hope the upcoming P4 LW K390 will also be heat treated the same...couldn't find a good P4 G-10 nowadays.

This seems overhardened, particularly with the Delica's thin blade stock. Bohler's maximum recommended hardness is 64 HRC. K390's toughness isn't fantastic anyway, and at 66.5 HRC, it's getting down near Maxamet.

Seems pretty tough to me.

https://youtu.be/TI53ziibeiQ

GarageBoy wrote: ↑

Sun Nov 15, 2020 1:29 pm

After the abuse Shawn has put his k390 police through, it looks plenty durable to me

Precisely why despite my aversion to large knives, I'm on the lookout for the P4 G10 K390...or if that isn't possible, consider purchasing the P4 LW K390.

I hope I could buy a P4 in K390 here in Europe at dealers shop, but not sure I will be lucky to see one enough earlier.