The heatproof austenite type rustless steel and the stainless steel metal tubing which are superior in resistance scale burble Characteristic

摘要

This heat-resistant austenitic stainless steel has a specific composition containing Ce and Zr and has an Hv 1 /Hv 0 ratio of 1.20 or higher, where Hv 1 is the average hardness of the area ranging from the surface to a thickness-direction depth of 50 wm and Hvo is the average hardness of the thickness-direction central part.