Vanadium Content in 4330V Steel

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According to you,"Some say it (V content) should be near the 0.05% minimum, others say it should be at or near 0.15%." and
"The problem is that nobody here understands the impact of Vanadium in this steel and how (if at all ) it affects the properties of steel "

I am not a metallurgist and most engineers and scientists rely on published data to settle a point like the one you have raised. Vanadium is a lot harder material than 4330 steel, and doping the latter with trace amounts of pure V imparts some of the hardness in modified steel. Either you buy these expensive manuals or publications that find out the facts or you do a hardness test in your engineering lab. But don't doubt the experience of others by wondering aloud if the addition of Vanadium in such low percentages (either at 0.05 % or at 0.15% ) really does something to the mechanical properties of steel . You may know that it is only this vanadized steel that is used in making hardest to break safes in banks etc.

You can , here is US, buy test coupons or strips of the various alloys to do the mechanical testing.
You may want to check out the info using the link below:

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