ISO9001 150LB 321SS Bonnet Seal Ring

Related products: ASME B16.20 Ring Joint Gaskets, API 6A Ring Joint Gaskets, API 17D Ring Joint Gaskets, Non-standard Ring Joint Gaskets     Thus Gasket supplies ring joint gaskets (RTJ Gasket) with the hardness numbers as follows: GASKET MATERIALS BRINELL HARDNESS NUMBER (max) ROCKWELL HARDNESS NUMBER (max) IDENTIFICATION Soft iron 90 56 D Low carbon steel 120 68 S 4-6% Chrome 1/2% molybdenum 130 72 F5 304 Stainless Steel 160 83 S304 316 Stainless Steel 160 83 S316 347 Stainless Steel 160 83 S347   Materi…