1﹑Material Summary and Applications
321 is austenitic corrosion resistant stainless steel. After Ti is added, it has a higher resistance to intergranular corrosion, but it still can’t overcome the edge corrosion after welding and poor surface quality defects.
Good resistance to corrosion in some organic acid and mineral acid of different density and different temperature.
It commonly used in the manufacture of acid containers and equipment of any lining pipeline. Also it used in large boiler superheater, reheater, steam pipesheat exchangers for petrochemical and other corrosion resistance parts and welded components.
Corrosion resistance is similar to TP304H steel, but higher resistance to intergranular corrosion because of Ti
5、Available Size Range for seamless pipes and tubes
OD 6 ～ 219mm
WT 1.0～12.7 mm