Maximum Operating Temperature: 102°F (450°C) and has a long lasting seal even in high temperature conditions, with less degradation of filler material at high temperature and high pressure conditions. Suitable for piping flanges, pressure containers, heat exchangers, valve bonnets, and other types of industry, especially suitable for low temperature gaskets such as high and high pressure steam and LNG. Provides excellent seal even in extreme conditions with pressure fluctuations and heat cycles. JIS10K Inner Wheel/Outer Wheel Material: SPCC (Iron)