Stainless Steel Seamless Heat Exchanger Tube ASME SA213 TP321 Bright Annealed U Bend Tube

Stainless Steel Seamless Heat Exchanger Tube ASME SA213 TP321 Bright Annealed U Bend Tube

TP321 is a standard austenitic stainless steel(under ASME/ASTM standards). It is equivalent to Grade 1.4541 (X10CrNiTi18-9) in Germany or 06Cr18Ni11Ti in China.

It is a stabilized version of 304 stainless steel (18% Cr, 8% Ni) with the addition of Titanium (Ti). This modification gives TP321 two major advantages:outstanding resistance to intergranular corrosion and excellent high-temperature strength.

Key Advantages of TP321

Mechanical & Physical Properties

Chemical Composition

The main difference between TP347 and TP347H lies in their carbon content and the resulting high-temperature performance. TP347H is the high-carbon version of TP347, specifically designed for applications requiring superior creep strength at elevated temperatures.

Main Limitation

• Welding Filler Metal:While the base metal is weldable,TP347 (stabilized with Niobium)is often preferred over TP321 filler metal to avoid titanium burn-off in the welding arc.

Typical Applications

Due to its stability under heat and corrosion, TP321 is used in demanding environments:

• Petrochemical:Refinery piping, heater components, and flare lines.
• Power Generation:Boiler shells, superheater tubes, and turbine exhaust systems.
• Industrial:High-temperature chemical tankers, pressure vessels, and expansion joints.