Exterior protective member made of austenitic stainless steel fora sheathing heater element

Abstract From the Canadian patent

Particularly important properties required for exterior protective members for sheathing heaters are resistance to oxidation, anti-stress corrosion properties and weldability. The austenitic stainless steel for the exterior protective members has been developed from the findings, firstly the resistance to oxidation can be remarkably improved by increasing the Cr content together with a combined addition of Al and rare earth metals secondly a small amount of Co addition is effective to enhance the alloy to withstand stress corrosion cracking in the environment to which sheathing heaters are subjected and that the weldability of such members can be made superior by maintaining the content of …