310S stainless steel is a highly alloyed austenitic stainless steel designed for elevated-temperature service. The high Cr and Ni contents enable this alloy to resist oxidation in continuous service at temperatures up to 1200°C, provided reducing sulfur gases are not present. In intermittent service, it can be used at temperatures up to 1030°C as it resists scaling and has a relatively low coefficient of expansion. This alloy has superior resistance, compared to both SS 304 and SS 309, in carburizing and reducing environments.