High-temperature element for protective atmospheres and reactive environments Kanthal® Super RA is specially designed to work in nitrogen at temperatures above 1250°C (2280°F). Other Kanthal Super molybdenum disilicide (MoSi2) heating elements have an excellent lifetime in oxidizing atmospheres but, when operating in nitrogen, nitration occurs. At temperatures above 1250°C (2280°F), the protective Kanthal Super RA heating elements withstands nitration at high temperatures better than any other type of Kanthal Super MoSi2 heating element. The nitration process still occurs, but to a 50% lower rate than for Kanthal Super 1800. The temperature, at which the weight reduction starts, is about 75°C (135°F) higher. The element has also a substantially longer lifetime in all reduced and oxygen-deficient atmospheres and is characterized by a high tolerance in other aggressive environments. Applications Kanthal Super RA heating elements is used in different types of sintering-, forging- and heat treatment furnaces. glaze is consumed and the silicon in the silicide of the elements may react with nitrogen forming silicon nitride, which can cause scaling. The speed of the process depends on the dew point and the time in the atmosphere. The solution to these problems has been to run the elements in air at high temperature for a couple of hours to restore the glaze. Special features • Longer life at high temperatures in reactive atmospheres • Long life in all reduced and oxygen deficient

Technical information Rate of nitration Mass change, mg/cm2 0.6 TG-analysis of Kanthal® Super RA and Kanthal Super 1800 in N2, Dp -40°C (-40°F) Maximum recommended element temperatures in different atmospheres The diagram is a guide to maximum temperatures in different atmospheres depending on dew point, vacuum etc. For details regarding specific applications, we recommend c

Kanthal® Super RA/1700 ■ Kanthal Super 1800 ■ Kanthal Super 1900 PROPERTIES Maximum operating temperature Composition Density Thermal conductivity 20-600°C (68-1110°F) 600-1200°C (1110-2190°F) Coefficient of linear expansion Specific heat capacity at 20°C (68°F) Emissivity Standard product range Kanthal Super RA is delivered as two- and four-shank elements with fixed terminals as an option for safe and reliable electrical connections. Special designs are available on request.

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...