347 Stainless Steel Pipe & Tube: Niobium-Tantalum Stabilized High-Temp Corrosion Resistant Piping

What is 347 Stainless Steel Pipe & Tube?

347 is a niobium-tantalum stabilized austenitic stainless steel pipe, offering superior high-temperature stability and post-weld corrosion resistance compared to titanium-stabilized grades, ideal for high-end industrial scenarios.

UNS: S34700|JIS: SUS347|GB: 06Cr18Ni11Nb|EN: X6CrNiNb18-10|W.Nr.: 1.4550

C: <=0.08|Si: <=1.00|Mn: <=2.00|P: <=0.045|S: <=0.030|Cr: 17.00-19.00|Ni: 9.00-13.00|Nb+Ta: >=10×C|Fe: Balance

Key Properties (20℃, Annealed, Horizontal)

Density: 7.93g/cm³|Melting Point: 1400-1450℃|Tensile Strength: >=515N/mm²|Yield Strength: >=205N/mm²|Elongation: >=40%|Hardness: <=201HB

• Niobium-tantalum stabilization: Delivers better high-temperature stability and post-weld corrosion resistance than titanium-stabilized grades • Excellent high-temperature creep resistance: Suitable for long-term service at up to 900℃ in high-stress environments • Reliable weldability: No obvious performance degradation after welding, adapting to complex high-end piping structures • High-end scenario dedicated: Applied in nuclear power, high-temperature furnaces and critical process pipelines

		C			P	S				N
S34700	347	0.08	0.75	2.00	0.045	0.030	17.00/19.00	–	9.00/13.00	–	Cb:10xC1.00

 

If you have project requirements for stainless steel, we welcome your order. GNEE has a large inventory of popular products for you to choose from. It can be processed into various practical product forms, including plates, coils, tubes, bars, wires, etc. For detailed chemical composition information and free samples, please contact our factory immediately. We offer competitive prices and excellent service.Email: info@gneestainless.com

 

Testing and Documentation: Factory test certificate, EN 10204 3.1, chemical report, mechanical report, destructive testing report, non-destructive testing report, PMI test report, visual inspection report, third-party inspection report, NABL certified laboratory report.
Packaging: Wooden crate packaging, bubble wrap packaging, steel strapping, or packaging according to customer requirements.