Note: This article is in fact over 4 years old, since it has already been posted it will still be listed, sorry for the confusion.

The "Deep Mystery" of Melted Steel - wpi.edu

There is no indication that any of the fires in the World Trade Center buildings were hot enough to melt the steel framework. Jonathan Barnett, professor of fire protection engineering, has repeatedly reminded the public that steel--which has a melting point of 2,800 degrees Fahrenheit--may weaken and bend, but does not melt during an ordinary office fire. Yet metallurgical studies on WTC steel brought back to WPI reveal that a novel phenomenon--called a eutectic reaction--occurred at the surface, causing intergranular melting capable of turning a solid steel girder into Swiss cheese.

Materials science professors Ronald R. Biederman and Richard D. Sisson Jr. confirmed the presence of eutectic formations by examining steel samples under optical and scanning electron microscopes. A preliminary report was published in JOM, the journal of the Minerals, Metals & Materials Society. A more detailed analysis comprises Appendix C of the FEMA report. The New York Times called these findings "perhaps the deepest mystery uncovered in the investigation." The significance of the work on a sample from Building 7 and a structural column from one of the twin towers becomes apparent only when one sees these heavy chunks of damaged metal.

A one-inch column has been reduced to half-inch thickness. Its edges--which are curled like a paper scroll--have been thinned to almost razor sharpness. Gaping holes--some larger than a silver dollar--let light shine through a formerly solid steel flange. This Swiss cheese appearance shocked all of the fire-wise professors, who expected to see distortion and bending--but not holes.

A eutectic compound is a mixture of two or more substances that melts at the lowest temperature of any mixture of its components. Blacksmiths took advantage of this property by welding over fires of sulfur-rich charcoal, which lowers the melting point of iron. In the World Trade Center fire, the presence of oxygen, sulfur and heat caused iron oxide and iron sulfide to form at the surface of structural steel members. This liquid slag corroded through intergranular channels into the body of the metal, causing severe erosion and a loss of structural integrity.

"The important questions," says Biederman, "are how much sulfur do you need, and where did it come from? The answer could be as simple--and this is scary- as acid rain."

(more after the jump..)

A mass of conrete, iron, and more found fused together below Ground Zero

9/11 - Can you keep a secret? I hope not - The Truth Will Set You Free

"The NIST report represents what can really only be called anti-science. They started with their conclusion and worked their way back to some leading hypothesis."

"Here is the meteorite - molten iron fused with concrete."

"Architects, engineers, people who work with steel - welders - have just never seen the level of destruction and the level of deformation of this material in their lives."

"As I stood there on the 33rd floor, I heard very strange noises on the 34th floor. now, the 34th floor was an empty floor - a floor that did not have any kind of walls, it was a construction floor. It was totally hollowed out there was nothing there . . . not even the elevators stopped there. You had to have a special access key to open the door on the 34th floor"

There are some very interesting clips in this short film, be sure to check it out for some things you might not have seen before.

Update:
This is actually part of the recently released 3 part series '9/11 Mysteries'. Sorry for the confusion, here is the link to the full film:
911 Mysteries - Demolitions (Full Length)

Hat tip to whatreallyhappened.com for the link!