Probably not much. How will another war in the Middle East lessen the demand for metals around the world? As for Alloy Steel's stock price, I wouldn't even expect much of a pullback from this, because the OTC BB trades so far under the radar.
What will happen though is that oil prices will spike in the short-term. So will the stocks of oil companies that have reserves in politically stable areas, domestic and Canadian oil royalty trusts, etc.
Another thing that may happen is that the prices of some Israeli stocks will drop in the short-term, on fears of Iranian retaliation. This could be a buying opportunity. There are plenty of these companies traded on the Nasdaq, so it wouldn't hurt to make a shopping list now. I already own a few shares of this one, ELOS.