Dipti Metal Industries, a Worldwide recognized, Largest, Best, and Top ASTM A312/A213 TP347 Stainless Steel Pipe & Tube Manufacturer, TP347 Stainless Steel Pipe & Tube importer, TP347 Stainless Steel Pipe & Tube stockist, TP347 Stainless Steel Pipe & Tube supplier, TP347 Stainless Steel Pipe & Tube exporter, TP347 Stainless Steel Pipe & Tube dealer, TP347 Stainless Steel Pipe & Tube distributor, and TP347 Stainless Steel Pipe & Tube trader from Mumbai, India, specializes in the production and supply of **Niobium/Columbium-stabilized austenitic stainless steel grade: TP347 (UNS S34700, 1.4550). Certified under **ASTM A312** for pipe and **ASTM A213** for seamless tube, this alloy offers superior resistance to intergranular corrosion (weld decay) and creep resistance when exposed to high-operating temperatures up to 870°C (1598°F).
The inclusion of Niobium/Columbium in TP347 is the superior method for stabilization, offering better thermal stability and creep properties than the Titanium used in TP321. This makes TP347 the preferred material for critical, high-pressure, high-temperature components in power and petrochemical plants where post-weld solution annealing is impossible. Our dual capability as a Manufacturer and importer ensures the highest quality control over production and sourcing from well global recognized manufacturers mills. We guarantee full compliance, material traceability, and prompt global delivery of our specialized TP347 piping solutions, backed by EN 10204 3.1/3.2 MTCs.
Dipti Metal Industries stands as a Worldwide recognized, Largest, Best, and Top ASTM A312/A213 TP347 Stainless Steel Pipe & Tube Manufacturer, TP347 Stainless Steel Pipe & Tube importer, TP347 Stainless Steel Pipe & Tube stockist, TP347 Stainless Steel Pipe & Tube supplier, TP347 Stainless Steel Pipe & Tube exporter, TP347 Stainless Steel Pipe & Tube dealer, TP347 Stainless Steel Pipe & Tube distributor, and TP347 Stainless Steel Pipe & Tube trader of Niobium-stabilized austenitic stainless steel pipe and tube products from Mumbai, India. ASTM A312 (Pipe) and ASTM A213 (Tube) are the primary specifications for the high-temperature grade, TP347 (1.4550).
TP347 is the ultimate stabilized grade for superior high-temperature performance, where its resistance to intergranular corrosion and enhanced creep properties surpass those of TP321. This grade is vital for the highest temperature services (up to 870°C) in corrosive environments found in refinery, petrochemical, and power generation boilers. Our comprehensive inventory, supported by both in-house Manufacturing and global sourcing from well global recognized manufacturers mills, includes both Seamless (SMLS) and Welded (ERW) forms in both standard (TP347) and high-carbon (TP347H) variations. We ensure all our TP347 piping solutions meet the creep strength, thermal stability, and corrosion resistance required by their respective ASTM/ASME standards. We provide a competitive edge through material expertise, full documentation (including EN 10204 3.1/3.2 MTCs), and efficient worldwide deliveries.
TP347 achieves its superior high-temperature stability by ensuring a minimum Niobium (Columbium) content that is at least ten times the carbon content (Nb/Cb ≥ 10 x C). The composition meets the requirements for both ASTM A312 (Pipe) and ASTM A213 (Tube).
| Element | Weight Percentage (%) | Role in Alloy (TP347) |
|---|---|---|
| Carbon (C) | 0.08 max | Controlled to maintain strength. (Higher for TP347H to increase creep strength.) |
| Manganese (Mn) | 2.00 max | Improves hot working and ductility. |
| Phosphorus (P) | 0.045 max | Impurity control. |
| Sulfur (S) | 0.030 max | Impurity control. |
| Silicon (Si) | 1.00 max | Improves oxidation resistance. |
| Chromium (Cr) | 17.00 – 19.00 | Provides fundamental corrosion and oxidation resistance. |
| Nickel (Ni) | 9.00 – 13.00 | Stabilizes the austenitic structure and increases toughness. |
| Niobium (Columbium) (Nb/Cb) | 10 x C min, 1.00 max | Primary Stabilizer. Locks up carbon for superior high-temperature weld stability and creep resistance. |
The mandatory ratio of Niobium/Columbium to Carbon is the most critical compositional requirement, ensuring the material remains immune to sensitization in the most demanding thermal conditions.
TP347's inherent Niobium stabilization grants it the best high-temperature creep and stress-rupture properties among the 300-series austenitic stainless steels, crucial for pressure containment applications up to 870°C.
Values refer to the solution annealed and pickled condition as per ASTM A312/A213 standards. TP347H specifies higher minimum strength due to its higher carbon content.
The superior creep and stress-rupture strength make TP347 and TP347H essential for high-integrity components operating under extreme thermal and mechanical load.
Dipti Metal Industries, your Top TP347 Stainless Steel Pipe & Tube Manufacturer and Supplier, ensures cross-compatibility and traceability for both TP347 and TP347H across major global project specifications, particularly in the Power and Petrochemical sectors.
| Designation Type | Grade / Number | Standard | Description |
|---|---|---|---|
| ASTM / ASME Pipe | TP347 / TP347H | ASTM A312 / ASME SA312 | Seamless/Welded Pipe for High-Temp & Corrosive Service. |
| ASTM / ASME Tube | TP347 / TP347H | ASTM A213 / ASME SA213 | Seamless Tube for Boiler, Superheater, and Heat Exchanger. |
| UNS Number | S34700 / S34709 | UNS (Unified Numbering System) | Standard international identification for 347 and 347H. |
| EN / W.Nr. | 1.4550 / 1.4961 | EN 10088 / DIN | The most common European equivalent for 347 (1.4550) and the high-carbon variant (1.4961). |
| Short Name | X6CrNiNb18-10 | EN 10088 (1.4550) | European chemical composition designation (Niobium Stabilized). |
| JIS | SUS347TP | JIS G3459 / G3463 | Japanese Industrial Standard equivalent for piping. |
We provide full dual certification for TP347 and TP347H (e.g., A312/A312H, A213/A213H) and strict verification of the Niobium stabilization ratio against these global standards.
Dipti Metal Industries offers a comprehensive inventory of ASTM A312/A213 TP347 Stainless Steel Pipe and Tube products in various forms, specifications, sizes, and lengths. Our status as a Best TP347 Stainless Steel Pipe & Tube Manufacturer and Stockist ensures custom production and immediate availability for urgent and large-scale requirements in the Energy, Aerospace, and Petrochemical sectors.
We also supply all related TP347 components, ensuring a full, integrated piping solution from a single Manufacturer and supplier, crucial for high-integrity, high-temperature pressure systems.
TP347 is the superior choice for stabilized austenitic stainless steel, engineered for the most severe high-temperature, high-pressure, and corrosive environments. We Manufacture and supply to high-stakes projects globally:
As a Worldwide recognized TP347 Stainless Steel Pipe & Tube Manufacturer and Supplier, Dipti Metal Industries ensures our products meet the stringent quality and dimensional demands of the Energy and Aerospace sectors.
Dipti Metal Industries, a Top TP347 Stainless Steel Pipe & Tube Manufacturer, Importer, Stockist and Supplier, ensures that all our ASTM A312/A213 TP347 Stainless Steel Pipes and Tubes adhere to major international standards for material composition, dimensions, and testing, from our own production or sourced from well global recognized manufacturers.
Our TP347 products comply with the following core material and dimensional specifications:
We ensure full material traceability and documented quality assurance through mandatory certifications and optional inspection services for all Manufactured or supplied products:
Dipti Metal Industries is a proud Worldwide TP347 Stainless Steel Pipe & Tube Exporter, leading Global TP347 Stainless Steel Pipe & Tube Supplier, Top TP347 Stainless Steel Pipe & Tube Manufacturer, TP347 Stainless Steel Pipe & Tube dealer, and major TP347 Stainless Steel Pipe & Tube stockist of TP347 Stainless Steel Pipe and Tube products. We ensure timely and compliant delivery of our premium products, from our own Manufacturing facility or sourced from well global recognized manufacturers mills, to major industrial hubs and commercial/utility markets across the globe, with a strong focus on Aerospace, Chemical, and Energy regions worldwide, solidifying our position as a Top international trading partner. We are your trusted TP347 Stainless Steel Pipe & Tube Manufacturer, Supplier and Stockist In Mumbai, India, providing global projects with high performance stainless steel solutions.
Dipti Metal Industries stands as a trusted global partner for sourcing high-quality stabilized stainless steel components. Our commitment to specialized alloys and demanding standards is why we are the Largest, Best, Top, and Worldwide recognized ASTM A312/A213 TP347 Stainless Steel Pipe & Tube Manufacturer, TP347 Stainless Steel Pipe & Tube importer, TP347 Stainless Steel Pipe & Tube stockist, TP347 Stainless Steel Pipe & Tube supplier, TP347 Stainless Steel Pipe & Tube exporter, TP347 Stainless Steel Pipe & Tube dealer, TP347 Stainless Steel Pipe & Tube distributor, and trader for TP347 products worldwide:
Contact Dipti Metal Industries, your expert Largest, Best, Top, Worldwide recognized ASTM A312/A213 TP347 Stainless Steel Pipe & Tube Manufacturer, TP347 Stainless Steel Pipe & Tube importer, TP347 Stainless Steel Pipe & Tube stockist, TP347 Stainless Steel Pipe & Tube supplier, TP347 Stainless Steel Pipe & Tube exporter, TP347 Stainless Steel Pipe & Tube dealer, TP347 Stainless Steel Pipe & Tube distributor, and trader from Mumbai, India. We are ready to discuss your specific requirements (e.g., Seamless A213 Tube, Welded A312 Pipe, specific OD, Schedule, or need for TP347H). Request a personalized, custom quote to secure the most effective and dependable TP347 piping solutions, produced in our facility or sourced from well global recognized manufacturers, that guarantee high-temperature stability and corrosion resistance for your critical process and structural needs. We are your one-stop solution for high-performance TP347 Stainless Steel Pipes and Tubes in Mumbai, India.
Typical dispatch: 15–45 days (project-dependent). Expedited deliveries may be available for urgent global projects.
TP347 (UNS S34700) is a Niobium (Columbium) stabilized version of TP304 stainless steel. This stabilization prevents the formation of chromium carbides during high-temperature exposure (427°C to 870°C) or welding, thus preventing intergranular corrosion (weld decay). TP347 is particularly noted for its superior high-temperature and creep properties compared to TP321. Dipti Metal is a Top ASTM A312/A213 TP347 Stainless Steel Pipe & Tube Manufacturer for critical high-pressure and high-temperature systems.
Both TP347 and TP321 stabilize TP304 against weld decay. TP347 uses Niobium (Columbium), which offers better strength and creep resistance at elevated temperatures than the Titanium used in TP321. Niobium is also more effective at fixing carbon and does not burn off during high-temperature electric arc welding as easily as Titanium. Dipti Metal supplies both grades, recommending TP347 for the most demanding high-pressure, high-temperature applications.
The industry standard European equivalent for ASTM TP347 (UNS S34700) is the DIN/EN material number 1.4550 (or X6CrNiNb18-10). This grade is used widely in Europe for power generation and pressure vessel fabrication. Dipti Metal guarantees cross-standard traceability and correct stabilization ratios for all TP347 materials supplied from our manufacturing and stocking base.
TP347 is essential for high-temperature service up to 870°C where creep resistance is paramount. Key applications include superheater and reheater tubes (A213), boiler components, large welded pressure vessel parts, heat exchanger tubes, and jet engine components. Dipti Metal is a Best TP347 Stainless Steel Pipe & Tube Exporter for the Petrochemical, Energy, and Aerospace sectors globally.
As a comprehensive Manufacturer and Stockist, we supply TP347 in Seamless Pipe (A312), Seamless Tube (A213/A269), Welded Pipe (A312), and matching components like Fittings (A403 WP347) and Flanges (A182 F347). All products come with verifiable MTCs (EN 10204 3.1 or 3.2) confirming the correct Niobium/Columbium stabilization.
Reach out to Dipti Metal Industries, your Worldwide recognized TP347 Stainless Steel Pipe & Tube Manufacturer, TP347 Stainless Steel Pipe & Tube importer, TP347 Stainless Steel Pipe & Tube stockist, TP347 Stainless Steel Pipe & Tube supplier, TP347 Stainless Steel Pipe & Tube exporter, TP347 Stainless Steel Pipe & Tube dealer, TP347 Stainless Steel Pipe & Tube distributor, and trader, for all your ASTM A312/A213 TP347 Stainless Steel Pipe & Tube requirements. As a leading global provider, we are ready to assist with technical specifications, pricing, and worldwide logistics for this essential grade, all sourced from well global recognized manufacturers mills.
Global export packaging • Full documentation & TPI for all TP347 orders.