Stainless Steel 347 Flanges are high-quality fittings made from the corrosion-resistant stainless steel grade 347, specifically designed for various industrial applications. Ferro Fittings and Alloys, based in Mumbai, India, is a leading manufacturer and exporter of these flanges, ensuring top-notch quality and reliability for clients across the globe. Our products are tailored to meet the stringent requirements of different industries, making them an essential choice for any project requiring durable and robust fittings.
The Stainless Steel 347 Flanges conform to industry standards such as ASTM A182, ASME B16.5, and EN 1092-1, ensuring they meet rigorous quality and performance benchmarks. Available in a range of sizes from DN 15 (NPS ½) to DN 600 (NPS 24), these flanges can handle pressure ratings from Class 150 to Class 2500 (PN10 to PN400). They are designed for applications involving temperatures ranging from -196°C to 800°C and can be equipped with various end connections, including weld neck, slip-on, and blind configurations, to suit diverse piping systems.
Industries that commonly utilize Stainless Steel 347 Flanges include Oil & Gas, Petrochemical, Chemical, Power Generation, Pharmaceutical, Shipbuilding, and Water Treatment sectors. With an increasing demand in regions such as the UAE, Saudi Arabia, and Qatar, our flanges are ideal for various project types, including EPC (Engineering, Procurement, and Construction), LSTK (Lump Sum Turnkey), and maintenance projects in the UK, USA, and beyond.
Ferro Fittings and Alloys is committed to quality, backed by our ISO 9001:2015 certification and the availability of EN 10204 3.1 / 3.2 Mill Test Certificates. Our in-house testing capabilities include PMI, Hydrostatic, Hardness, Impact (Charpy), Ultrasonic Testing (UT), and Liquid Penetrant Testing (LPT), ensuring that our products meet the highest standards. Additionally, our compliance with NACE MR 0175 / ISO 15156 makes our flanges suitable for sour service applications. Request a free MTC sample or get a quick quote via WhatsApp.
Choosing Ferro Fittings and Alloys means opting for a competitive lead time of just 2–4 weeks, with no minimum order quantity restrictions and readily available stock. We offer flexible shipping terms, including FOB Mumbai, CIF, and CFR, along with comprehensive export documentation. For inquiries, please reach out to us at +91-86550-39959, connect via WhatsApp at wa.me/+918655039959, or email us at sales@ferrofittings.com. Your satisfaction is our priority!
Trusted manufacturer & exporter of Flanges, Pipe Fittings and Valves in 30+ countries.
1–4 weeks depending on size, grade & quantity.
Urgent and bulk orders handled efficiently.FOB, CIF, CFR, EXW, DDP (Incoterms 2020).
Door-to-port and door-to-door delivery available.Sea Freight / Air Cargo / Express Courier.
Complete export documentation & tracking support.Trusted by EPC contractors, procurement teams, and global industrial buyers across multiple countries for certified supply and reliable delivery.
Direct supply with bulk stock availability to reduce your overall project cost.
ISO 9001, ISO 14001, ISO 45001, PED certified with full test certificates.
Safe, sea-worthy packaging ensuring damage-free international delivery.
Selecting the right partner for Stainless Steel 347 Flanges is critical for ensuring product quality, long-term performance, and successful project execution. As a trusted manufacturer and exporter, Ferro Fittings and Alloys delivers high-quality materials meeting international standards and global industry requirements.
Understand the key differences between local suppliers, trading companies, and professional manufacturers & exporters like Ferro Fittings and Alloys.
| Evaluation Factor | Small Local Suppliers | Trading Companies | Ferro Fittings and Alloys |
|---|---|---|---|
| Manufacturing Control | Limited or outsourced production | Dependent on third-party mills | Direct manufacturing with strict quality control |
| Standards Compliance | Basic or local standards | Varies depending on supplier | ASTM, ASME, ANSI, EN, ISO certified products |
| Inspection & Certification | Limited documentation | Inconsistent certification | MTC, TPI, and full export documentation provided |
| Export Capability | Mostly domestic supply | Moderate export handling | Global exports with complete logistics support |
| Delivery Reliability | Uncertain timelines | Depends on sourcing chain | Consistent lead times with ready stock availability |
| Project Risk Level | High | Medium | Low |
| Product | Composition | Standard | Application |
|---|---|---|---|
| Stainless Steel 347 Flanges | Fe, Cr (17.0-19.0%), Ni (9.0-12.0%), Nb (10 times C), C (max 0.08%) | ASTM A182 / ASME SA182 | Used in high-temperature applications, gas and oil refineries, chemical processing industries |
| Stainless Steel 347 Flanges | Fe, Cr (17.0-19.0%), Ni (9.0-12.0%), Nb (10 times C), C (max 0.08%) | EN 10088-2 | Ideal for applications requiring excellent corrosion resistance and oxidation resistance |
| Stainless Steel 347 Flanges | Fe, Cr (17.0-19.0%), Ni (9.0-12.0%), Nb (10 times C), C (max 0.08%) | DIN 1.4550 | Commonly used in aerospace and power generation industries |
Stainless Steel 347 Flanges are designed for high-temperature applications and offer excellent resistance to corrosion and oxidation. With a composition that includes chromium, nickel, and niobium, these flanges maintain their strength and toughness even under extreme conditions. They are manufactured in compliance with international standards such as ASTM, ASME, and DIN, ensuring high quality and reliability. Our flanges are available in various sizes and pressure ratings, with standard dimensions accommodating ASME B16.5 and B16.47 specifications. We provide a Material Test Certificate (MTC) upon request, and our in-house testing capabilities include PMI, Hydrostatic, and Impact tests to ensure the highest quality. Stock is available for quick delivery; contact us for a quick quote or to request a free sample MTC.
| Material | Stainless Steel 347 |
|---|---|
| Grades | 347, 347H |
| Standard | ASTM A182, ASME B16.5 |
| Size Range | 1/2" to 24" |
| Pressure Rating | 150, 300, 600, 900, 1500, 2500 psi |
| Surface Finish | Mill Finish, Polished |
| End Connection | Weld Neck, Slip-On, Blind, Socket Weld |
| Form | Round, Square |
| Grade / UNS | Common Name | Key Feature | Typical Application |
|---|---|---|---|
| S34700 | 347 | Excellent resistance to intergranular corrosion | High-temperature applications, such as heat exchangers and pressure vessels |
| S34703 | 347H | Higher carbon content for improved high-temperature strength | Applications requiring higher strength at elevated temperatures |
| S34709 | 347Cb | Stabilized with columbium for enhanced resistance to sensitization | Welded structures in corrosive environments |
| S34780 | 347L | Low carbon variant for improved weldability | Welding applications in chemical processing |
| S347G | 347G | Good oxidation resistance and high-temperature strength | Gas turbine components and other high-stress applications |
| Size / DN | Pressure Class | Wall Thickness | Length |
|---|---|---|---|
| 1/2" (15 mm) | 150 | 0.120" (3.05 mm) | 5.00" (127 mm) |
| 3/4" (20 mm) | 150 | 0.120" (3.05 mm) | 5.00" (127 mm) |
| 1" (25 mm) | 150 | 0.120" (3.05 mm) | 5.00" (127 mm) |
| 1-1/2" (40 mm) | 150 | 0.120" (3.05 mm) | 5.00" (127 mm) |
| 2" (50 mm) | 150 | 0.120" (3.05 mm) | 5.00" (127 mm) |
| 3" (80 mm) | 150 | 0.120" (3.05 mm) | 5.00" (127 mm) |
| Element | Min (%) | Max (%) |
|---|---|---|
| Carbon (C) | 0.08 | 0.10 |
| Chromium (Cr) | 17.00 | 19.00 |
| Nickel (Ni) | 9.00 | 13.00 |
| Tantalum (Ta) | 0.60 | 1.00 |
| Manganese (Mn) | 2.00 | 2.00 |
| Silicon (Si) | 0.50 | 0.75 |
| Phosphorus (P) | 0.040 | 0.040 |
| Property | Value | Unit | Test Standard |
|---|---|---|---|
| Yield Strength (0.2% offset) | 205 | MPa | ASTM A240 |
| Tensile Strength | 515 | MPa | ASTM A240 |
| Elongation in 2 inches or 50mm | 40 | % | ASTM A240 |
| Hardness (HB) | 187 | HB | ASTM A240 |
| Impact Toughness (Charpy V-Notch) | 80 | J | ASTM A240 |
| Property | Value (Metric) | Value (Imperial) |
|---|---|---|
| Density | 7.93 g/cm³ | 0.286 lb/in³ |
| Melting Point | 1450 °C | 2642 °F |
| Specific Heat | 500 J/(kg·K) | 0.12 BTU/(lb·°F) |
| Thermal Conductivity | 16.2 W/(m·K) | 112 BTU/(hr·ft·°F) |
| Electrical Resistivity | 0.72 µΩ·m | 0.72 µΩ·in |
| Standard | Grade | UNS | Werkstoff Nr. | BS |
|---|---|---|---|---|
| AISI | 347 | S34700 | 1.4550 | BS 3146 |
| ASTM | 347 | S34700 | 1.4550 | BS 3146 |
| EN | X6CrNiNb18-10 | S34700 | 1.4550 | BS 3146 |
At Ferro Fittings and Alloys, we ensure that all raw materials used in the manufacturing of Stainless Steel 347 Flanges meet stringent quality standards. Our materials are sourced from reputed suppliers and undergo thorough inspection to verify compliance with ASTM A240 and ASME SA240 specifications. Each batch is subjected to Positive Material Identification (PMI) testing to confirm the alloy composition and ensure material integrity.
The fabrication of Stainless Steel 347 Flanges involves advanced forming techniques, including hot and cold working processes. Our skilled technicians utilize CNC machines for precision cutting and shaping. The flanges are manufactured in various dimensions, including sizes from 1/2 inch to 24 inches, and pressure classes such as 150#, 300#, and 600#. This ensures compatibility with a wide range of piping systems and applications.
| Process | Temperature (°C) | Medium | Purpose |
|---|---|---|---|
| Solution Annealing | 1050-1100 | Air | To enhance corrosion resistance and relieve stresses |
| Stabilization | 870-900 | Air | To reduce carbide precipitation and improve weldability |
Quality assurance is paramount at Ferro Fittings and Alloys. Each Stainless Steel 347 Flange undergoes rigorous testing, including Hydrostatic Testing, Hardness Testing, and Impact Testing (Charpy). We provide Material Test Certificates (MTC) compliant with EN 10204 3.1 and 3.2, ensuring that our products meet international standards. Our commitment to quality is further validated by our ISO 9001:2015 certification and adherence to PED 97/23/EC.
| Grade | Size / Dimension | Price (USD/Kg) | Price (INR/Kg) |
|---|---|---|---|
| SS 347 | 1/2" (15 mm) | $4.50 | ₹370 |
| SS 347 | 1" (25 mm) | $4.80 | ₹395 |
| SS 347 | 2" (50 mm) | $5.20 | ₹430 |
| SS 347 | 4" (100 mm) | $6.00 | ₹495 |
Note: Prices are indicative and subject to change based on quantity, raw material costs, and delivery terms. Contact us for the latest quotation.
Our multiple locations and strong logistics network make it easy for customers across India to source Stainless Steel 347 Flanges from Ferro Fittings and Alloys. Contact us for prompt delivery at competitive prices.
Ferro Fittings and Alloys exports Stainless Steel 347 Flanges to 50+ countries worldwide. We handle all export documentation, sea-worthy packaging, and logistics to ensure on-time, damage-free delivery anywhere in the world.
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Ferro Fittings and Alloys is a leading ISO 9001:2015 certified manufacturer, supplier, and exporter of high-quality pipe fittings, valves, flanges, round bars, sheets, plates, pipes, tubes, and expansion bellows. Based in Mumbai, India, we serve industrial sectors including oil & gas, petrochemical, power generation, pharmaceuticals, marine, and construction.
We supply a comprehensive range of grades — Stainless Steel, Duplex & Super Duplex, Carbon Steel, Alloy Steel, Inconel, Hastelloy, Monel, Titanium, Nickel, and Nimonic Alloys — to customers in 50+ countries. Our products are manufactured as per ASTM, ASME, ANSI, MSS, BS, DIN, and EN standards with EN 10204 3.1/3.2 Mill Test Certificates.
📍 Address: 6th Kumbharwada, Shop No. 154, Near Alankar Cinemas, Mumbai 400 004
📞 Mr. Aashit Shah: +91 86524 99959
📞 Mr. Bhavin Shah: +91 86550 39959
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