Seamless Stainless Steel TP321H |UNS S32109|1.4878 Tube

Seamless Stainless Steel TP321H Tubes (UNS S32109 / W.Nr. 1.4878) are high-carbon austenitic solutions specifically engineered for superior creep strength and structural stability in extreme thermal environments. As a premier manufacturer based in Fujian, China, Tengqi produces high-integrity seamless tubing that strictly adheres to ASTM A213, ASTM A312, and ASME SA213 international standards.

Distinguished by an optimized carbon content (0.04–0.10%) and strategic Titanium (Ti) stabilization, our TP321H tubing prevents sensitization and intergranular corrosion while maintaining enhanced mechanical properties at temperatures exceeding 538°C (1000°F). These tubes are indispensable for mission-critical applications in superheater coils, heat exchanger tubing, and high-pressure steam systems. Through advanced cold-drawing and precise solution annealing, Tengqi guarantees a uniform grain size and maximum durability for demanding thermal cycling conditions.

"The 'H' in TP321H stands for high carbon, which is specifically controlled to provide higher creep-rupture strength at temperatures above 1000°F (537°C) compared to standard TP321."