... 105,RX20-215,BX150-303,Inch1/2"-24" Ring joint gasket (RTJ gasket) are manufactured in accordance with JPI-7S23, ANSI B16 ... inconel600.M-400,C-276,SS316,SS3048.Application:vale,gate,flange,oil&gas industry, 9.Hardness and TemperatureMaterialMax Hardness(HB)Max ... (degrees)soft iron90450carbon steel120450F51150540304160600316160600michael at rilson com cn Ring Joint Gasket (RTJ gasket)(Flange RTJ Gasket)