What heat flux level can cause structural failure in steel?

The level of heat flux that can lead to structural failure in steel is closely associated with the temperature at which steel begins to lose its strength. At approximately 100 kW/m2 of heat flux, steel can reach temperatures around 600°C (1112°F), a critical point where it starts to lose significant carrying capacity and structural integrity.

The specific threshold of 100 kW/m2 is significant because it reflects the intensity of heat that can heat structural steel components sufficiently for them to undergo thermal expansion and softening. This raises the risk of collapse, especially in fire scenarios where steel beams or columns are exposed to flames and high temperatures for prolonged periods.

Understanding this threshold is vital in fire safety engineering and structural design, ensuring that appropriate materials and safeguards are used to resist the effects of potential fire exposure.