What is ASTM A182 F321 material? ASTM A182 F321 / 321H stainless steel flanges are forged austenitic stainless steel grades belonging to the 321 stainless steel (SS 321) family. Titanium (Ti) stabilizes this grade to prevent intergranular corrosion, particularly in high-temperature environments. Chemical Composition of ASTM A182 F321\321H CHEMICAL LIMITS C Mn P S Si […]