When Does Steel Become Soft?

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

At what temperature does stainless steel become malleable?

Stainless Steel*: 1375 – 1530°C (2500-2785°F) Titanium: 1670°C (3038°F) Tungsten: 3400°C (6152°F) Zinc: 420°C (787°F)

At what temp does steel glow?

Iron or steel, when heated to above 900 °F (460 °C), glows with a red color. The color of heated iron changes predictably (due to black-body radiation) from dull red through orange and yellow to white, and can be a useful indicator of its temperature.