Ring Joint Seal Gasket 1.Type:R,BX,RX2,Size:R11-105,RX20-215, inch 1/2''-inch24'' 3.Standard:API,ASME B16.20 4 ... steel, soft iron, inconel600, M-400, C-276, 10#,ss316,ss304.8.Application: W/N flange, gate valve, oil&gas industry ... and Temperaturematerialmax hardness(HB)max temperature(degrees)soft iron90450carbon steel120450F51150540304160600316160600 API 6A Seal Ring Joint Gasket