Technology  >  Heat Treatment   >  Cold Treating

COLD TREATING of steel is widely accepted within the metallurgical profession as a supplemental treatment that can be used to enhance the transformation of austenite to martensite and to improve stress relief of castings and machined parts. Common practice identifies -84 C (-120 F) as the optimum temperature for cold treatment. There is evidence, however, that cryogenic treatment of steel, in which material is brought to a temperature of the order of -190 C (-310 F), improves certain properties beyond the improvement attained at cold-treatment temperatures.