Threshold temperatures

temperature at which a solid turns liquid

temperature at which a substance changes from liquid into vapor

thermodynamic point where three matter phases exist

temperature at which air becomes saturated with water vapour

temperature and pressure point where phase boundaries disappear

lowest temperature at which a volatile substance can vaporize to form an ignitable mixture in air

lowest temperature at which a material spontaneously ignites in a normal atmosphere without an external source of ignition

reversible transition in amorphous materials at which amorphous polymers go from hard to viscous

fluid/superfluid transition point of helium

Temperature below which a liquid loses its ability to flow

temperature at which an electrical or mechanical device can operate

temperature that combustion products theoretically can reach if no energy is lost to the outside environment

range of temperatures from absolute zero to very high

temperature at which certain solid substances change from one crystal structure to another

temperature at which a polymer or plastic sample deforms under a specified load

indication of the heat resistance of a lubricating grease and the temperature at which it passes from a semi-solid to a liquid state under specific test conditions

Melting points of chemical mixtures