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China, Chinese ASTM A213 Tp347 Steel Pipe Stainless Steel Seamless Tube1 Industrial Products Supplier Manufacturer Details, price list catalog:
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EZ Steel Industrial Co., Ltd.
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Product Description Product DescriptionPropertyDescriptionKey DetailsMaterial TypeAustenitic stainless steel, stabilized with niobium (Nb)Grade: TP347 (UNS S34700)Chemical CompositionHigh chromium (Cr: 17-20%), nickel (Ni: 9-13%), and niobium (Nb: 10×C-1.0%)Stabilized against carbide precipitation for improved corrosion resistance.High-Temperature PerformanceExcellent oxidation and scaling resistance up to 800°C (1472°F).Retains strength in cyclic thermal environments (e.g., boilers, superheaters).Corrosion ResistanceResists intergranular, pitting, and stress corrosion cracking.Performs well in acidic/alkaline mediaMechanical PropertiesHigh tensile strength and creep rupture resistance.Typical values: Tensile ≥515 MPa, Yield ≥205 MPa (at room temperature).FabricationEasy to weld (TIG, MIG, SAW) without post-weld heat treatment.Good cold-forming capability for complex geometries.Standards & CertificationsComplies with ASTM A213 (seamless tubes), ASME SA213 (pressure systems).Equivalent to EN 1.4550, DIN X6CrNiNb18-10.Applications- Boilers, superheaters, and heat exchangers in power plants.- Petrochemical refining systems.- High-temperature reformers.Ideal for environments requiring thermal stability and corrosion resistance. 1. Superior High-Temperature PerformanceOxidation and Corrosion Resistance: TP347 exhibits excellent resistance to oxidation, scaling, and corrosion in high-temperature environments (up to 800°C / 1472°F). Its chromium (Cr) content (~17-20%) and nickel (Ni) content (~9-13%) form a protective oxide layer, ensuring long-term durability.Stabilization with Niobium: The addition of niobium minimizes carbide precipitation during welding or prolonged high-temperature exposure, preventing sensitization and intergranular corrosion. 2. Excellent Mechanical StrengthCreep and Rupture Resistance: TP347 maintains high tensile strength and creep resistance under sustained thermal stress, making it ideal for pressure components in power plants and petrochemical industries.Thermal Stability: The austenitic microstructure remains stable across a wide temperature range, ensuring consistent performance in cyclic heating/cooling conditions. 3. Fabrication and WeldabilityEase of Welding: TP347 is readily weldable using common techniques (TIG, MIG, or SAW) without post-weld heat treatment, reducing fabrication time and costs.Formability: Its ductility allows for cold working and forming into complex geometries, supporting versatile industrial applications. 4. Resistance to Aggressive MediaAcid and Alkali Resistance: Performs well in environments containing sulfuric acid, nitric acid, and alkaline solutions, making it suitable for chemical processing equipment.Anti-Fouling Properties: Smooth surface finish reduces scaling and fouling in heat transfer applications, improving operational efficiency. 5. Compliance with Global StandardsCertifications: Conforms to ASTM A213 (seamless tubes), ASME SA213 (pressure applications), and equivalent EN/DIN standards (e.g., 1.4550).Quality Assurance: Manufactured under strict controls for chemical composition, mechanical properties, and non-destructive testing (NDT) to ensure reliability. Typical ApplicationsPower generation boilers and superheatersHeat recovery steam generators (HRSGs)Petrochemical refining componentsHigh-temperature heat exchangers and reformers Detailed Photos
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