The SUS321 stainless steel as a stabilizing element exists, but it is also the hot strong steel, in high temperature  than 316L better.SUS321 stainless steel organic acid and inorganic acid in different concentration, different temperature, especially with corrosion resistant good performance in the oxidation medium, used in the manufacture of wear and wear resistant acid container equipment, pipeline lining.

The chemical composition of SUS321 stainless steel pipe：

The mechanical properties of SUS321 stainless steel pipe： 
The tensile strength σb (MPa)：≥520  
The yield strength σ0.2 (MPa)：≥205  
Elongation δ5 (%)：≥40  
Section shrinkage ψ (%)：≥50  
Hardness ：≤187HB;≤90HRB;≤200HV