7 ms·
Not melt, soften slightly
by afterburner 2y ago
Not melt, soften slightly
- rob74 2y agoSoften "slightly", but enough to make the building which that steel is holding up collapse...
- pfdietz 2y agohttps://www.steelconstruction.info/Fire_damage_assessment_of_hot_rolled_structural_steelwork https://www.steelconstruction.info/Fire_damage_assessment_of... "Strength loss for steel is generally accepted to begin at about 300°C and increases rapidly after 400°C. By 550°C steel retains approximately 60% of its room temperature yield strength, and 45% of its stiffness. At high temperatures, steel is also subjected to significant thermal elongation, which may lead to adverse impacts, especially if it is restrained." At 800 C ("dull cherry red"), the yield strength is down ~90%: https://www.steelconstruction.info/images/9/99/Steel_strength_in_fire.png https://www.steelconstruction.info/images/9/99/Steel_strengt... This is talking about short term properties of steel, which would be important in building fires, but creep also increases with temperature.