Seamless Stainless Steel TP347H |UNS S34709|1.4912 Tube

Seamless Stainless Steel TP347H Tube Manufacturer & Supplier in China
Seamless Stainless Steel TP347H tubes are high-performance austenitic stainless steel tubing solutions stabilized with niobium (columbium), specifically engineered for elevated temperature service and enhanced creep resistance. Designed for long-term exposure to high temperatures, Stainless Steel 347H Seamless Tubes (UNS S34709 / DIN 1.4961) provide excellent intergranular corrosion resistance and superior mechanical strength in demanding industrial environments.
Tengqi is a trusted TP347H seamless stainless steel tube manufacturer and supplier based in Fujian, China, with extensive experience in precision pipe manufacturing. We produce premium-quality SS 347H seamless tubes that meet strict international quality standards and high-pressure application requirements.
Standards & Specifications
Our TP347H seamless tubes are manufactured in compliance with:
ASTM A213/ASME SA213/DIN 1.4961/UNS S34709
Key Features of TP347H Seamless Tubes
Excellent high-temperature strength and creep resistance
Superior resistance to intergranular corrosion
Good oxidation resistance in elevated temperature environments
Stable mechanical properties under pressure
Precise dimensional tolerances and smooth surface finishes
We offer a comprehensive range of outer diameters, wall thicknesses, and pressure ratings to meet diverse industrial specifications. Custom cut-to-length services and bulk supply options are available for EPC contractors and large-scale industrial projects.

"Our precision-controlled Niobium content (Nb ≥ 8 X C) ensures complete stabilization of carbides, providing maximum resistance to sensitization and intergranular attack even after welding."