What is ASTM A182 F321 material? ASTM A182 F321 / 321H stainless steel flanges are forged austenitic stainless steel grade that belongs to the 321 stainless steel (SS 321) family. It is stabilized with titanium (Ti) to prevent intergranular corrosion, especially in high-temperature environments. Chemical Composition of ASTM A182 F321\321H CHEMICAL LIMITS C Mn P S […]