Seamless Stainless Steel TP347H |UNS S34709|1.4912 Pipe

Seamless Stainless Steel TP347H Pipes (UNS S34709 / W.Nr. 1.4912) are premium high-alloy austenitic solutions specifically engineered for superior creep-rupture strength and oxidation resistance in extreme thermal environments. As a leading manufacturer based in China,We produces high-integrity seamless piping that strictly adheres to ASTM A213, ASTM A312, and ASME SA213 international standards.

Distinguished by the strategic addition of Niobium (Nb) and an optimized carbon content, our TP347H tubing ensures exceptional stability and resistance to intergranular corrosion at service temperatures up to 815°C (1500°F). These pipes are indispensable for mission-critical applications in superheater tubes, reheater coils, and high-pressure steam systems. Through advanced cold-drawing and precise solution annealing, guarantees a uniform grain structure and maximum durability under intense thermal stress.

“Our precision control over the Niobium-to-Carbon ratio ensures that carbides are fully stabilized, preventing sensitization and maintaining superior structural integrity during prolonged high-temperature service.”