Crucible Question

[Bronco]

At the risk of getting flamed for being a "Spec Sheet Commando", I'm hoping someone can help me interpret the following data as presented on the Crucible website.
In this chart we see that CPM-3V exhibits roughly 75 to 80% of the wear resistance of CPM-10V:
http://www.crucibleservice.com/cruplas.htm

In this chart, however, the wear resistance of 3V is advertised to be barely half that of 10V:
http://www.crucibleservice.com/coldftol.htm

Assuming my eyesight isn't failing me, the question then becomes:

1. Is this discrepancy merely an indication that 3V is tempered to a different hardness when it's to be used for cold forming tooling versus when it's to be used for plastics tooling, or....

2. Is the discrepancy simply attributable to the fact that these graphs have no units of measurement indicated and may not be to scale, or....

3. Is it possible that Crucible simply does a sloppy, inaccurate job of posting data.

Opinions?

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Semper Fi

-Bill

 

[Sumo]

from the difference in the graph, to me it's entirely possible they're comparing different *kinds* of wear resistance, ie the plastics tooling use of 3V IMO would probably be moreso used to resist abrasive wear from glass fiber filled plastics.
With cold forming tooling you'd have something more like adhesive wear resistance depending on the material, ie the material being worked trying to adhere to or 'gall' the tool.

The other possibility of course is your questions 1 and 2 are right too

anyhoo, hope that helped

Rich

 

[Bronco]

Thanks Rich. Anyone else care to hazard a guess?

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Semper Fi

-Bill

 

[e_utopia]

I think the graphs are just general, and all you can draw from them is if one steel has more or less of some property than another steel. They are made of ='s, so they cannot be too accurate. If you want the real scoop, call up Crucible and order the spec. sheets.

--JB

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e_utopia@hotmail.com