New applications for Kanthal APMT™ alloy promise more cost effective high temperature sintering
August 6, 2014
Sandvik Heating Technology, based in Hallstahammar, Sweden, states that it is now marketing a unique alloy for furnace applications that promises superior oxidation and corrosion resistance.
Kanthal APMT is an alumina forming FeCrAlMo alloy with mechanical properties suitable for structural applications such as retorts and muffles. As such, it is suited to high temperature Powder Metallurgy sintering at temperatures of up to 1250°C (2282°F) and above, with air or combustion atmosphere on one side.
The development of this dispersion strengthened Powder Metallurgical superalloy started when researchers at Sandvik Materials Technology realised that the unique high temperature capability of the Kanthal® FeCrAl-based heating elements could be combined with the high temperature creep resistance of Ni-based alloys by using a special PM technology and micro alloying.
The Kanthal APMT product has until now been limited to seamless extruded tubes for components such as tube-based Kanthal heating systems and for furnace rollers capable of handling the extreme temperatures required for heat treatment of, for example, special stainless steels.
The product program has now been expanded into a wider range of wide hot rolled plate, bar, rod and forgings that opens up the possibilities of using the material in applications such as hot wall sintering retorts, muffles and transport systems.
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