The main material of traditional high-pressure flanges is steel, including carbon steel, stainless steel and alloy steel. Among them, in the carbon steel material, the carbon steels with the numbers 20#, Q235, and Q345 (mainly 16Mn in the old national standard) are most commonly used; in stainless steel, the amount of stainless steel labeled 304L, F316, and 316L is used. Maximum; in alloy steel, the use of alloy steels labeled F9, F11, F12, 16MnR and Cr5Mo is increased. In addition, what is to be said is. At present, ceramic composite steel is also being used gradually in the production of traditional high-pressure flanges. Moreover, the wear resistance of traditional high-pressure flanges with ceramic composite steel as the main material has been proved to be much higher than that of other materials.
The main material of the high-pressure self-tightening flange is basically the same as that of the traditional high-pressure flange. However, in order to ensure that the high-pressure self-tightening flange can be more suitable for harsh environments, it is generally imported nickel steel, WC5 (1.25% chromium 0.5% molybdenum) steel, CN7M alloy steel and CF8M (316 stainless steel) steel.