ASTM A213 TP321 Seamless Tube Pickled Annealed for Boiler Superheater

YUHONG GROUP is a company with over 25 years of experience in dealing with Austenitic Stainless Steel and Nickel Alloy Steel (such as Hastelloy, Monel, Inconel, Incoloy) seamless and welded pipes and tubes. We sell over 80,000 tons of steel pipes and tubes every year, serving clients in more than 45 countries including Italy, UK, Germany, USA, Canada, Chile, Colombia, Saudi Arabia, Korea, Singapore, Australia, Poland, France, etc.

What is TP321?

Stainless Steel 321 is an essential austenitic 18/8 steel (Grade 304) that is stabilized by the addition of Titanium (321). It is chosen for its resistance to intergranular corrosion after being exposed to temperatures within the carbide precipitation range of 425-850°C. SS 321 is widely used in applications with temperatures up to approximately 900°C, as it offers high strength, resistance to scaling, phase stability, and resistance to subsequent aqueous corrosion. SS 321H, on the other hand, is a modified version of SS 321 with a higher carbon content, resulting in improved strength at high temperatures.

Specifications

Mechanical & Physical Properties

Chemical Composition about TP321 and TP312H

ASTM A312 TP 321 Stainless Steel Seamless Pipe Available Size