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Cryodur2990(Deutsche Edelstahlwerke) inquiry

Posted by Berserker 
Cryodur2990(Deutsche Edelstahlwerke) inquiry
November 10, 2016 05:57PM
Hi all,

Recently i came across these stocks:

[www.zknives.com]

Has anyone here heard of this? if so, can you share if it is a good steel for blade making?

I have also compared it to Calmax.

Thank you for your input.

Jaysmiling smiley
Re: Cryodur2990(Deutsche Edelstahlwerke) inquiry
November 10, 2016 06:42PM
Quote
Berserker
Hi all,

Recently i came across these stocks:

[www.zknives.com]

Has anyone here heard of this? if so, can you share if it is a good steel for blade making?

I have also compared it to Calmax.

Thank you for your input.

Jaysmiling smiley
Hi,
see
Composition Comparison Graph For The Knife Steels Crucible CPM 3V, Deutsche Edelstahlwerke Cryodur2990, Latrobe DuraTech Pyrovan HC Version 4.35
Crucible Selector - CPM® 3V / CPM 3V Info - AKS™ - CPM 3V Steel
...
and blade_materials.html#T_3V

____
Thanks
I don't mow smiling smiley
Re: Cryodur2990(Deutsche Edelstahlwerke) inquiry
November 10, 2016 11:02PM
Wow, this is amazing.

I last checked on the 2990, it says it's a ledeburitic alloy.
Re: Cryodur2990(Deutsche Edelstahlwerke) inquiry
November 11, 2016 06:33AM
Got a reply about this from BF:

Quote
Alan TAn;16652753
Hi Jay

DEW 1.2990 C - 1.00 Si 0.9 Mn - Nil Cr 8.0 Mo 1.6 V 1.6
CruWear C - 1.10 Si 1.10 Mn - 0.35 Cr 7.5 Mo 1.6 V 2.4 W 1.15

DEW 1.2990 is actually an 8% Cr coldwork steel , similar to a grade which was produced by Crucible name CruWear , but with lower Vanadium content and without Tungsten in it . In comparision you could expect CruWear to has a better wear resistance in it , due to the higher V content + W in it .

Compared to D2 / 1.2379 , 1.2990 / CruWear would have a better toughness and wear resistance . Grade to grade comparison , DEW 1.2990 would be very similar to Daido DC53 or Uddeholm Sleipner , which falls under the same family of 8% Cr cold work steel.

Uddeholm Calmax / AISI S7 is a completely different family of steel which has good toughness , but the wear resistance is no wherr near to 1.2990 / Cruwear . Also Calmax could only be hardened to approximately 56/58 HRC ) due to the lower C content ) while 1.2990 / CruWear can achieve 62/63 HRC instead.


Rgds
Alan
cKc
Re: Cryodur2990(Deutsche Edelstahlwerke) inquiry
November 13, 2016 03:25PM
"Also Calmax could only be hardened to approximately 56/58 HRC"

Hmm.. Every Calmax knife I've made is 60RC.. S7 reaches 57/58RC.. maybe just a typo..

dont know about the steel you are asking, but Calmax is one of my favourite outdoor knife steels. a wonderful mix of properties

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KnivesAndStuff (YoutTube)
Re: Cryodur2990(Deutsche Edelstahlwerke) inquiry
November 27, 2016 08:45AM
Kyley,

Generally in most promotional materials when they quote hardness they refer to large batch scale processes which are economically viable. This means they will often be underhardened. They also have to be careful to specify on the low end that which is easy to achieve. Otherwise they could easily be held accountable for the normal variations in hardening in industry.
Re: Cryodur2990(Deutsche Edelstahlwerke) inquiry
November 28, 2016 07:40PM
Agree.
I sent a batch of 440c to a Japanese based HT company and they only hardened the blade to HRC 54.
If you remember VT Tools from GearBastion, Kumar commented the same thing as the 440c could go up to HRC58 for its intended use.
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