Burnt Orange Rex 45

[Sharp Guy]

.....M4 is such a well known and well regarded steel that I think the comparison has a lot of value.

Anyone know what hardness Spyderco runs their M4 at? Benchmade says their M4 is 62-64. Do you think Spyderco's is similar?

[Pelagic]

.....M4 is such a well known and well regarded steel that I think the comparison has a lot of value.

Anyone know what hardness Spyderco runs their M4 at? Benchmade says their M4 is 62-64. Do you think Spyderco's is similar?

It would be nice to know, but a lot of people get upset when someone asks if spyderco would/should release hardness ratings. I don't care about precise numbers, but when Sal said the average of these REX 45 models was 66.5 I was very thankful and got incredibly intrigued.

[Tucson Tom]

.....M4 is such a well known and well regarded steel that I think the comparison has a lot of value.

Anyone know what hardness Spyderco runs their M4 at? Benchmade says their M4 is 62-64. Do you think Spyderco's is similar?

I wondered the same. It might be different for a Taiwan M4 like the Gayle Bradley versus the M4 exclusives from Golden. It would certainly be interesting to know if we start wanting to compare M4 to Rex 45.

[Tucson Tom]

Sorry Tom! I just saw a seemingly random exclamation about the Para 3 lanyard hole and the discussion that followed. I thought this thread was supposed to be about the REX 45 sprint run which does include the Para 3 but also the Paramilitary 2 and Military. I guess I got a little frustrated. There are already several threads discussing the Para 3 specifically and numerous posts about the clip and lanyard hole.

http://www.spyderco.com/forumII/viewtop ... 5#p1218495

http://www.spyderco.com/forumII/viewtop ... 1#p1206691

http://www.spyderco.com/forumII/viewtop ... 4#p1187194

http://www.spyderco.com/forumII/viewtop ... 7#p1170157

I'll stop derailing this thread further.

Yeah, all that ran off into the wild blue yonder. I appreciate the links though and have spent some time with them. Strong opinions and people on either side of the fence. I won't know where I am at until I have a PM3 in Rex 45 in my hand I guess. I'm not hard to please though. Hopefully the thread is now back on track. A waiting game now to see how many of these preorders get filled and when.

[Sharp Guy]

.....M4 is such a well known and well regarded steel that I think the comparison has a lot of value.

Anyone know what hardness Spyderco runs their M4 at? Benchmade says their M4 is 62-64. Do you think Spyderco's is similar?

It would be nice to know, but a lot of people get upset when someone asks if spyderco would/should release hardness ratings. I don't care about precise numbers, but when Sal said the average of these REX 45 models was 66.5 I was very thankful and got incredibly intrigued.

I know it's not generally published information and Sal through us a bone on this one. I basically asked about M4 to see if anyone had a rough idea. It would be nice to know what we're comparing against.

I worked in manufacturing for several years. I made tooling and hardened parts in house as well as QC'd tooling I had sourced out. I used a hardness tester every day. Man I sure miss having access to that machine!

I don't recall anybody around here getting upset with anyone for asking about the hardness of Spyderco's steel.

[The Mastiff]

Seems like we heard rc 65 for the M4 when the Bradley liner lock came out. I don't know if there were other statements from Sal for the other releases. It is a good balance with great performance all around which is more important than the number itself. When I ask for higher hardness on steels it's more saying I don't want to see potential performance left out and not any feeling that I know better than the engineers/metallurgists and knife designer actually working on the projects. When I say performance left behind I'm referring to M2 being run at under rc59 like one company did.

I can find no companies running these high speed steels at full hardness like rc 66 would be on these. They will be pretty impressive and should perform really nicely. They have what it takes to be run that hard. It's gonna be fun.

Joe

[Pelagic]

What kind of edge retention are you guys expecting from this run?

Does anyone have any experience with 65-66rc HAP40?

Effects of Cobalt on edge retention?

[HarleyXJGuy]

So the Rex 45 is HAP 40 from a different maker?

[Deadboxhero]

What kind of edge retention are you guys expecting from this run?

Does anyone have any experience with 65-66rc HAP40?

Effects of Cobalt on edge retention?

No one knows, Sal said himself there isn't much to compare to it. Perhaps they found something exciting in the Testing and HT

Who knows.

My best Kitchen Knife is a Sukenari 210mm Kirtsuke in HAP 40 which they say is at 68 HRC.

https://japanesechefsknife.com/collecti ... mm-3-sizes



Blows my hap40 delica out of the water.

Holds a criper edge longer and Sharpens better too, it WANTs to get sharp and deburrs like a champ.

The Diamond waterstones really help.


As far as the effects of Cobalt

Read up on Larrin's site and subscribe
He is a metallugist and his work is well researched and sourced.

http://knifesteelnerds.com/2018/05/14/w ... -in-vg-10/

[Deadboxhero]

So the Rex 45 is HAP 40 from a different maker?

Basically,

Hap40 is made in Japan by Hitachi, they generally don't export Japanese knife steels.
That's why models in Japanese steel are Made in Japan

CPM REX 45 is made in New York by Crucible Industries
The formula is similar.

Whats so exciting is the the Golden crew is working directly with the material and that they are going for a higher HRC then what they did with Hap 40.

We'll have to see what they do and how well it's implimented and excuted.

[sal]

Hitachi will send us any steel we want except ZDP. They say that ZDP must be heat treated by their authorized heat treating houses that they've trained.

I'm carrying a production Para 3 in REX 45 today, so it won't be long now.

sal

[restless ghost]

Nice!

[Deadboxhero]

Hitachi will send us any steel we want except ZDP. They say that ZDP must be heat treated by their authorized heat treating houses that they've trained.

I'm carrying a production Para 3 in REX 45 today, so it won't be long now.

sal

Wow, very cool

Nothing stopping ya guys from some super blue golden knives then :D

So exciting, this is a great year to be a Spyderfreek

[Jmotley]

Not to derail the thread, but Sal, when you say Hitachi will ship to “us” do you mean just the American facility or to any spyderco production facility? Because a super blue Sliverax with grey g10 would be fantastic.

[Spydersense]

I'm carrying a production Para 3 in REX 45 today, so it won't be long now.

sal

Sweet!

[sal]

Not to derail the thread, but Sal, when you say Hitachi will ship to “us” do you mean just the American facility or to any spyderco production facility? Because a super blue Sliverax with grey g10 would be fantastic.

Hi JMotley,

They'll ship to golden. We ship to Taichung from Golden.

sal

[husq2100]

I'm carrying a production Para 3 in REX 45 today, so it won't be long now.

sal

You obviously know someone in Spyderco...

:D

[shaztec]

Hitachi will send us any steel we want except ZDP. They say that ZDP must be heat treated by their authorized heat treating houses that they've trained.

I'm carrying a production Para 3 in REX 45 today, so it won't be long now.

sal

Omg imagining super blue military, police and manix 2 right now...

[jpm2]

What kind of edge retention are you guys expecting from this run?

Does anyone have any experience with 65-66rc HAP40?

Effects of Cobalt on edge retention?

Based on 66 hrc and good ht, I expect it to compete with k390.
No experience with hap40 in this range.

[Pelagic]

What kind of edge retention are you guys expecting from this run?

Does anyone have any experience with 65-66rc HAP40?

Effects of Cobalt on edge retention?

Based on 66 hrc and good ht, I expect it to compete with k390.
No experience with hap40 in this range.

I'm hoping for almost maxamet. Which k390 basically is.