CPM series?

Apr 24, 1999
I just picked up the new BLADE magazine special, "Tek Knives," and they have an article in there entitled "Strato-Steels." Well, they talk about many steels/blade materials, not the least among them being Talonite and INFI, but what intrigued me the most, as always, was their discussion of the CPM series of steels. What is the deal w/ making CPM. What I mean is, what's powdered metallurgy? They explain it a little, but since I'm not a metallurgist nor someone so interested in steels that I need to know their compositions/forging methods, I couldn't really quite get it. They talk about getting the steel in a powdered form or something like that, but just exactly how is it formed into one piece? It just seemed worthwhile asking, seeing as how they talked about grain structure, blah blah blah, and I'm reminded of how a Spyderco ad (I think) quotes CPM 440V being the new super steel. In the end what I really wanna know is this: Overall, how would it stack up against the old standbys (for some of you guys) of 154CM and ATS-34 or the new bad boys Talonite and INFI (in all categories)?
I the tests I have done with cpm 440v and cpm 420v these steel are far better in all tests INCLUDING bend test that I have used .
They out preform the others in some cases two to one... IF HEAT TREATED PROPERLY

Web Site At www.infinet.com/~browzer/bldesmth.html
Take a look!!!

Thrawn; there is a very easy to read, humerous, yet helpful description of the Particle Metallurgy process at the Benchmade Forum (I think they are still in business. Heh heh). Here is the URL:

Scroll down the left side of the website, and look for 'Articles.' Under this heading, you will find 'metallurgy.' Click on this, and you will find the explanation.

There is a wealth of information on the CPM website itself. Here is the home URL:

Be sure and click on 'Heat Treatment and Fabrication of Tool Steels.' Also, click on 'Tool Steels,' then click on the revealed topic, 'Selecting High Performance Tool Steel.' Good information at these sites.

Want to know about Talonite (r)? Check out Carbide Processors URL:

If you want to know more about a particular alloy and you just have its' number, this is a good site which will give you full info regarding the alloy (there are over 16,000 different alloys here):

Another good site for this type search, which also has hardness conversion tables, a copy of the periodic table, weight conversion tables, a metallurgic glossary, and lots of other good stuff is Principal Metals:

For a good dictionary of metallurgical terms, try this:

A good discussion of stainless steels, very readable, can be found here:

With these websites, you will be able to educate yourself, and answer nearly any metallurgical question. Good hunting.


Thrawn; one other thing. CPM is a company which makes alloys using PARTICLE metallurgy.

POWDER metallurgy refers to 'sintered' parts, which are of low cost, made from powdered metal granules, and some type of binder, bonded together with heat and pressure.

PARTICLE metallurgy stands for very high quality high class methodology and products. Powder metallurgy does not stand for this; in fact, alloys and parts produced by this methodology are inferior to particle metallurgy alloys.

Just FYI. Walt