MICC Sheath types UNS Ref. DIN Ref.
Inconel 600 NO6600 2.4816

Inconel 600
Inconel 600 is Nickel-Chromium-Iron alloy with very good oxidation resistance and strength at high temperatures (up to 1150 °C).

Do not use in sulphur atmospheres higher than 550 °C (use 310 instead)

Inconel is often encountered in extreme environments. It is common in gas turbine blades, seals, and combustors, as well as turbocharger rotors and seals, electric submersible well pump motor shafts, high temperature fasteners, chemical processing and pressure vessels, heat exchanger tubing, steam generators and core components in nuclear pressurized water reactors, natural gas processing with contaminants such as H2S and CO2,

Corrosion Resistance
Inconel alloys are oxidation and corrosion resistant materials well suited for service in extreme environments subjected to pressure and heat. When heated, Inconel forms a thick, stable, passivating oxide layer protecting the surface from further attack.