From Crucibles DATA SHEET
"CPM 154 is CPM-manufactured version of Crucible's standard 154CM. The CPM manufacturing process produces a uniform distribution of the carbides in this grade, giving this CPM 154 easier grinding and polishing, plus better toughness than conventional 154CM, while retaining similar heat treat response and wear properties."
"CPM" is a powdered metal process.
There is no mention of a chemical difference between CPM 154 and 154 CM.

Hitachi makes ATS34 and Crucible makes 154CM. They are near identical in chemical make up.
The biggest difference in ATS 34/154 CM from 440C is that they both have about 3% less chromium and 4% more molybdenum than 440C.
There is no amount of vanadium listed for 154CM, ATS 34 or 440C.

I received my 154CM today.
Tim


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