At What Temperature Does Steel Soften?

Steel can be soft at 538°C (1,000°F) well below the burning temperature of jet fuel.

At what temperature does steel lose hardness?

From 300 to 680°C, the hardness of the steel decreases and the impact toughness increases with increasing tempering temperature, while a secondary hardening with maximum hardness, 48.6 HRC, is achieved at 550°C.

Does heat make steel softer?

Heat to Alter Metal

Brass, steel, iron copper and silver can all be made weaker by heating the metal to a set temperature and cooling it slowly. It's not only used to create softer metal products but also more electrically conductive ones.