Steel and low temperature

There are five basic elements in iron and steel materials, namely carbon, silicon, manganese, phosphorus and sulfur. Phosphorus is afraid of cold. When the temperature is low, it will become brittle and destroy the strength of steel. The fracture of steel equipment is due to the huge tensile force caused by the contraction of steel when the temperature drops. Steel becomes brittle at low temperature, so it breaks under the action of huge tensile force. There is no fixed temperature.