Hard facing is a thermal coating process in which a wear- and corrosion-resistant overlay material is bonded metallurgically with the base material. Corrosion protection is an important issue, particularly when the material is used under such extreme conditions as those prevailing in waste incinerator heat exchangers, one of many key applications of Nicrofer S 6020. In applications like these the versatile material is exposed to particularly aggressive gases at temperatures of up to 1,000 degrees Celsius. This places extreme demands on the reliability and quality of the corrosion protection. Applying Nicrofer S 6020 to lower-alloyed – and thus less expensive – tubes in heat exchangers reduces part damage and significantly prolongs the life of this material-intensive equipment.