Electric heating element for direct use up to 1580°C (2875°F) in oxidizing, inert and reducing atmospheres Kanthal® Super ER is a new unique concept for heating elements, combining the features of alumina formers with the higher temperature of MoSi2-based heaters. The new heating element provides opportunities for designing systems that meet the demands of processes in multi-atmospheres. Another benefit over molybdenum or graphite elements, for example, is that the elements can be replaced whilst the furnace is still very hot, minimizing downtime. As the elements work directly in the furnace atmosphere, there is no need for a muffle to protect them from the atmosphere. Furnace design can be made simpler with a lower build cost and with much reduced maintenance costs. Kanthal Super ER is equally suitable for low temperature oxidizing processes. The major reason for the new and outstanding features of Kanthal Super ER is that it has a protective surface layer of pure alumina. The alumina layer grows on the surface of the heating element at high temperatures even in dry hydrogen. The elements can work in direct contact with high alumina supports without corrosive reactions. Applications Kanthal Super ER is an electric heating element, with the unique ability to operate up to 1580°C (2875°F) directly in a wide range of furnace atmospheres – from very dry reducing to oxidizing. It is now possible, in just one furnace, to operate firing cycles where the atmosphere condition can be altered, during the cycle, between oxidizing, inert, carburizing, nitriding, reducing and vacuum. Depending on the dew point, the element can work up to 300°C (540°F) higher in reducing atmospheres, compared to standard Kanthal Super elements. A wide range of furnace atmospheres and processes. Most types of PM (powder metallurgy) sintering in dry hydrogen and furnaces with alternating oxidizing and reducing atmospheres. Continuous furnaces with hydrogen containing atmos-pheres for ferrite sintering and MLCC processing. Typical applications: • Float process for fused silica • Sintering furnace • Reducing and oxidizing furnace • Diffusion furnace for semi-conductor industry Special features • High purity • Very good oxide adhesion • Corrosion resistance in reducing atmospheres • Standard and special

Technical information Maximum furnace temperatures for selected heating elements °F The data should be considered as approximate, since maximum furnace temperature depends on surface loading, gas-velocity, dew point, vacuum level and etc. • Kanthal Super ER is the most versatile • Kanthal Super ER can work 300°C (540°F) heating element. higher in reducing atmosphere compared to Kanthal Super and SiC element. K anthal Super ER can work 550°C (990°F) higher in vacuum compared to SiC and Kanthal Super element, and 450°C (810°F) compared to FeCrAl. H igher maximum temperature compared to metallic...

Oxidation and corrosion properties Increase in resistance, % oxidation and corrosion properties Due to the replacement of silicon by aluminum in the silicide phase, the oxidation mechanisms change. This also allows operation at low temperature in air. At higher temperatures a thicker alumina scale is formed. As the alumina scale gets thicker, there is very low risk for any spallation during the cooling due to the same coefficient of thermal expansion between bulk and protective oxide. A protective alumina layer continues to grow on the surface of a heater operating at 1575°C (2870°F) in H2, N2...

Sandvik Group The Sandvik Group is a global high technology enterprise with 47,000 employees in 130 countries. Sandvik’s operations are concentrated on three core businesses: Sandvik Tooling, Sandvik Mining and Construction and Sandvik Materials Technology – areas in which the group holds leading global positions in selected niches. Sandvik Materials Technology Sandvik Materials Technology is a world-leading manufacturer of high value-added products in advanced stainless steels and special alloys, and of medical implants, steel belt-based systems and industrial heating solutions. Kanthal is a...