Pitting in CPM440V ?

[C L Wilkins]

Have any of you guys come across this?

C Wilkins

 

[Jerry Hossom]

This is just a guess, but I suspect the heat treating. High Chrome CPM steels use a very high Austenitizing temperature (often >2000 degrees). Unless they are done in an atmospherically controlled oven, you may have gotten some decarburization.

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Jerry Hossom
www.hossom.com

 

[C L Wilkins]

Jerry,
I suppose I should have mentioned that I am working this piece from barstock and it hasn't even been heat treated yet.....

C Wilkins

 

[Jerry Hossom]

Well, unless that is just surface pitting which is not unusual, send it back. If it is surface imperfections, they should be no more than a few thousandths deep.

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Jerry Hossom
www.hossom.com