What is the temperature at which sustained combustion will occur called?

The temperature at which sustained combustion will occur is best described as the fire point. When a substance reaches its fire point, it will not only ignite but continue to burn without the application of an external ignition source. This characteristic is crucial for understanding how materials behave in fire scenarios and is fundamental for formulating safety protocols in hazmat operations.

The other terms relate to different points in combustion processes. The ignition point refers to the temperature at which a material will ignite from an external flame or spark. The flash point is the lowest temperature at which vapors can ignite in the air, but ignition may not lead to sustained burning. Autoignition temperature is the temperature at which a substance ignites spontaneously without an external ignition source. Understanding these distinctions is important in hazard assessment and emergency response in hazardous materials situations.