Blade Steel wikipedia article

FlaMtnBkr said:
CPM154 is just 154CM made with crucible's particle metal process ...
Click to expand...

Yes, the CPM designation indicates Crucible's process, and yes, it results in notable differences in material performance (and price).

I also agree, it is generally accepted that carbon steel is friendlier to sharpen than most high-performance SS.
Personally, I think geometry is more important to ease-of-sharpening.
 
I'll be working more tomorrow.
I'll probably add more steels, and if you do edit, use an account (please).
 
Good work!

Perhaps it'd help if you explained designations of the "Alphanumeric steels".
E.g. M and T series are high speed tool steels designed to cut metals and retain working hardness at high temperatures.

S - Shock absorbent tool steels.

D - High chromium cold work tool steels
A - Air hardening cold work tool steels
O - Oil hardening cold work tool steels

L - low alloy tool steels

W - Water hardening tool steels

Damascus steel probably also needs clarification, as Wootz and modern damascus (pattern) are not the same.

For steel chemistry you can use - Knife steel composition chart. Allows you to identify ~1600 steels by name and their compositions (466 for now).
 
My main source came from there.
Thanks for the Letter definitions, I'll have to devise a way to implement that.

However, I almost got dragged into an edit war...
 
Yea, some guy is telling me I need to Cite every single sentence containing information, despite the CLEAR as the sky reference at the end of the sentence...
 
There are quite a few errors in the article. The reason why they're calling for more references is because not all of your references back up the information you're giving. S60V isn't a step above S30V, they don't even make it anymore because S30V and S90V are both superior to it. The vanadium addition is not what makes CPM-154 more corrosion resistant. If you want to talk about benefits of PM process you can use Crucible info. You don't have any references for 420. When properly heat treated it does not break or chip easily, it's actually much tougher than many higher carbon steels. Statements like "can easily hold a sharp edge" with VG-10 is way too broad. Though references rule on Wikipedia, not everything Talmadge has said is true. Quite impossible to be 100% accurate with such large articles on so many steels.

I don't mean to be purely negative, there is some good stuff in the article. It's a pretty good idea to do one, I think. Some may see it as superfluous with other more general articles on steels, though. Hopefully it doesn't get taken down completely.

Edit: You should avoid statements like 'steel x is better than steel y." Only rarely is one steel "better" than another.
 
Last edited:
Technically CPM is different from PM, probably that needs clarification as well.
 
How is "Can hold a sharp edge" broad?
If it said "generally," then that would make sense.
I did put refs for the 420 know, thanks for pointing that out.
 
Crucible has a good explantion of the CPM process on their website, and have published analyses of their steels, such as CPM154. May I suggest, you'd be better off linking to sources like those, rather than offering a broad and inaccurate description. Or at least read them first :)

For instance, the use of vanadium in steel has almost nothing to do with corrosion-resistance, as you state in the article. The beauty of V is that it forms extremely hard, stable carbides that greatly improve wear-resistance and strength.

Additionally, Crucible doesn't even list vanadium in their data sheet for CPM154. They generally make a point to mention vanadium in the steel's name when they use it (such as CPM3V and S30V).

I don't mean to step on your toes. This is an admirable project.
 
Last edited:
Well, I certainly appreciate that you took the time to do this! It is great so far, nice and concise, though it could use some extension (more steels).
 
Nomad333 said:
How is "Can hold a sharp edge" broad?
If it said "generally," then that would make sense.
I did put refs for the 420 know, thanks for pointing that out.
Click to expand...
There are too many ways an edge can degrade to simply state that it holds a sharp edge better than another steel. The edge could degrade through chipping, wear, corrosion, rolling, etc. Is the steel superior in all of these ways? For example, 420 will hold a sharp edge longer than VG-10 in a corrosive environment, and 52100 will out cut 10V if it is taken to a fine edge radius and push cutting is used.
 
Larrin said:
There are quite a few errors in the article... S60V isn't a step above S30V, they don't even make it anymore because S30V and S90V are both superior to it...
Click to expand...

Personally I think Nomad did a great job on this. There is always a starting point and improvements spring from that. As for your opinion about S60V, there are quite a few errors in your comment.
 
Haha, thank you for the praise. I was not the only one helped in the project (just started it).
I'll try to add a few more steels tomorrow
 
IMHO Larrin is one of the most knowledgeable members when it comes to metallurgy, and I personally have learned and had a lot of help from him on my projects.

As for the CPM S60V, both statements were true, it didn't work well in knife blades and it was discontinued, so... I'm not quite sure how there are "quite a few errors" in those statements.
It'd be helpful if those errors were clarified, since it's part of the article anyway.
 
Last edited:
I'm sorry guys, I won't try to help anymore. My comments were too negative. I have to remember the rule of 10 positives for every negative. I wish you the best of luck on your wiki project. :thumbup:
 
You must log in or register to reply here.
Back
Top