Creative Speculation
In reply to the discussion: 9/11 Debunked: "Molten Metal" Explained [View all]AtheistCrusader
(33,982 posts)My fireproof safe is an inch thick layer of, what is essentially, gypsum board. It's only rated to 1000c for like, 15 minutes. That's not even very good, it's on the lower end of fireproof scale/cheap.
Refineries deal with this a lot, as sulfides are common in the fuels they are working with. There are specialized carbon steel compounds used to combat it. http://www.csb.gov/in-cooperation-with-cal-osha-csb-releases-technical-report-on-chevron-2012-pipe-rupture-and-fire-extensive-sulfidation-corrosion-noted/
The ATSM steel in the towers has none of that. I don't know why that guy's tests didn't show the problem. There are practical concerns in shipping loads of that sort of steel over oceanic distances, because if it starts corroding it gets hot, and the heat can damage the ship itself, start fires, etc. I will assume his tests do not account for all the variables present in the rubble pile. Heat, compression, convection, other catalysts like paint, etc. Did he spray water on it while the temps were still maintained? Localized steam on hot iron is problematic, like a plasma fire, etc.
Edit: Sorry about the title of my previous post. It looked ok in preview, but a couple Unicode characters in the formula blew up in the site software, apparently.