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Originally posted by bsbray11
The materials would have to be laid directly upon each other too in some significant amount, which would be pretty significant indeed when you're talking about globally collapsing one of the largest steel skyscrapers in the world. Powdered, as Aelita just mentioned, to really work, and then it would require a lot of heat to get the reaction started. The heat required to start a thermite reaction wouldn't naturally occur in the WTC.
Although the reactants are stable at room temperature, when they are exposed to sufficient heat to ignite (usually by igniting with a burning magnesium ribbon, but other methods are used as well, such as potassium permanganate and glycerine) they burn with an extremely intense exothermic reaction. The products emerge as liquids due to the high temperatures reached (with iron (III) oxide, up to 2500°C (4500°F)— although the actual temperature reached depends on how quickly heat can escape to the surrounding environment. Thermite contains its own supply of oxygen, and does not require any external source such as air. Consequently, it cannot be smothered and may ignite in any environment, given sufficient initial heat. It will burn just as well while underwater, for example, and cannot even be extinguished with water, as water sprayed on a thermite reaction will instantly be boiled into steam. This, combined with the extremely high temperatures generated, makes thermite reactions extremely hazardous even when appropriate precautions are taken.
Originally posted by grimreaper797
thermite could naturally be ignited if the flame is hot enough, around 2000 degrees fahrenheit is usually enough ive heard. anyway aluminum must be in powdered form and they are usually mixed. its dangerous to create because the possibility of accidental ignition (so ive heard) if you make it into the type demolition crews use. to make it like that is overall dangerous.
anyway thermite doesnt melt the steel fully, just warps it really bad so its pretty weak. thats what causes the building to crumble and collapse usually in demolitions. Planted in the right spots you can take down any building.
Most steel has other metals added to tune its properties, like strength, corrosion resistance, or ease of fabrication. Steel is just the element iron that has been processed to control the amount of carbon. Iron, out of the ground, melts at around 1510 degrees C (2750°F). Steel often melts at around 1370 degrees C (2500°F).
Originally posted by STolarZ
Is there some data about steel bending point ? We know when steel will melt but what about bending point ?
Originally posted by STolarZ
If it's true than fires in WTC couldn't heat steel to enough temp. to lose its integrity what could've cause collapse. Right or wrong ?