Duplex 2304 EFW Pipe manufacturer
Duplex 2304 EFW Pipe manufacturer specializes in producing high-quality pipes made from Duplex 2304 stainless steel using the Electric Fusion Welding (EFW) process. This material is known for its excellent corrosion resistance, enhanced strength, and superior durability, making it ideal for demanding industrial environments. The seamless integration of duplex stainless steel properties with the EFW manufacturing technique ensures pipes that meet stringent industry standards and deliver reliable performance in critical applications.
These pipes feature a balanced microstructure of austenite and ferrite, providing exceptional resistance to stress corrosion cracking and chloride-induced corrosion. With a typical composition that includes chromium, nickel, and molybdenum, Duplex 2304 pipes offer a higher yield strength compared to conventional stainless steel grades. The EFW process enhances the structural integrity of the pipes, ensuring consistent wall thickness and smooth internal surfaces suitable for high-pressure fluid transport.
Widely used across the oil and gas, chemical processing, marine, and power generation sectors, these pipes are designed to withstand harsh environmental conditions. Their robust mechanical properties make them suitable for pipelines, heat exchangers, and structural applications where both corrosion resistance and strength are critical. The versatility of Duplex 2304 EFW pipes allows them to perform efficiently in both onshore and offshore installations, supporting long-term operational reliability.
Manufacturers focusing on export readiness ensure that these pipes comply with international standards such as ASTM, ASME, and ISO certifications. Comprehensive quality control measures, including non-destructive testing and dimensional inspections, guarantee that each pipe meets global industrial requirements. Additionally, the availability of customized dimensions and finishes caters to the specific needs of international clients, facilitating seamless integration into various industrial projects worldwide.
Choosing a reliable supplier for these duplex stainless steel pipes means gaining access to expertly crafted products backed by technical support and timely delivery schedules. Their export-friendly packaging and documentation streamline logistics, enabling industrial buyers to procure high-performance piping solutions with confidence. Overall, Duplex 2304 EFW pipes represent a strategic investment for industries seeking durable, corrosion-resistant components that uphold safety and efficiency standards across diverse applications.
Lead Time
2–7 weeks depending on size
Delivery Terms
FOB, CIF, DDP
Shipping Modes
Sea / Air / Express
Why Duplex 2304 EFW Pipe manufacturer Are Preferred by Global Buyers
- ✔ Factory Pricing: Direct manufacturer rates with bulk stock
- ✔ Certified Quality: ISO & 3rd-party tested, EN 10204 certified
- ✔ Export-Ready: Sea-worthy packaging for on-time delivery
- ✔ Fast RFQs: Quick quotes for custom sizes & quantities
- ✔ Traceability: 100% heat number tracking from raw material to finished product
Trusted by industries like oil & gas, petrochemicals, power, marine, and heavy engineering.
- Manufacturing Capacity: 500 MT / Month
- Export Experience: 15+ Years
- Countries Served: 50+
- Annual Export Volume: 5,500 MT
Table of Contents
- 1. What is Duplex 2304 EFW Pipe manufacturer
- 2. How to Choose the Right Manufacturer
- 3.Comparison of Duplex 2304 EFW Pipe manufacturer
- 4. Why Global Buyers Source from Ragnar Metals and Tubes
- 5. Features
- 6. Technical Overview
- 7. Specifications
- 8. Available Grades
- 9. Available Sizes
- 10. Chemical Properties
- 11. Mechanical Properties
- 12. Physical & Thermal Properties
- 13. Electrical Resistivity
- 14. Equivalent Grades
- 15. Manufacturing Process & Heat Treatment
- 16. Various Types
- 17. Applications & Uses
- 18. Industries We Serve
- 19. Latest Price List
- 20. MOQ & Payment Terms
- 21. Export Packaging & Shipping
- 22. Cities We Supply in India
- 23. Countries We Export Worldwide
- 24. Our Certifications
- 25. Quality Inspection & Testing
- 26. Our Other Product Types
- 27. People Also Search For
- 28. Frequently Asked Questions
- 29. About Ragnar Metals and Tubes
How to Choose the Right Duplex 2304 EFW Pipe manufacturer
India is home to hundreds of manufacturers ranging from small job shops to large ISO-certified exporters. International and domestic buyers typically evaluate manufacturers based on quality compliance, production capacity, export experience, and pricing transparency.
- Certification & international standards (ASME, ASTM, EN)
- Manufacturing capability vs trading activity
- Export documentation & inspection support
- Stock availability & lead time reliability
- Past supply experience in oil & gas, EPC & heavy industries
Comparison Factors Among Duplex 2304 EFW Pipe manufacturer
| Evaluation Factor | Small Local Suppliers | Trading Companies | ISO-Certified Manufacturers |
|---|---|---|---|
| Manufacturing Control | Limited | None | Full in-house / audited partners |
| International Standards | Basic | Depends on source | ASME / ASTM / EN |
| Inspection & MTCs | Limited | Inconsistent | EN 10204 3.1 / 3.2 |
| Export Experience | Low | Medium | 50+ countries |
| Risk for EPC Projects | High | Medium | Low |
International buyers typically prefer ISO-certified manufacturers for large-scale or critical applications due to better quality control, documentation, and lower project risk.
Why Global Buyers Choose Ragnar Metals and Tubes
Ragnar Metals and Tubes is a trusted ISO 9001:2015 certified manufacturer and global exporter of ferro alloys and metal products, supplying consistent, high-quality materials to customers across USA, UK, Europe, Middle East, Africa, and Asia-Pacific. Our focus on quality assurance, cost efficiency, and on-time delivery makes us a preferred sourcing partner for international buyers.
| Key Advantage | Buyer Benefit |
|---|---|
| ISO 9001:2015 Certified Manufacturing | Consistent quality with documented QA systems and process control |
| ASME / ASTM / EN Compliant Products | Globally accepted standards with EN 10204 3.1 / 3.2 MTCs |
| Lower Manufacturing & Sourcing Costs | Save up to 15–20% compared to European suppliers |
| Favorable Exchange Rate Advantage | Reduced landed cost for international importers |
| In-House Testing & Inspection Facilities | Strict chemical, mechanical & dimensional quality checks |
| Bulk Stock & High Production Capacity | Fast order fulfillment and stable supply for large projects |
| Custom Sizes & Drawing-Based Manufacturing | Products manufactured exactly to buyer specifications |
| Export-Grade Packaging & Global Logistics | Sea-worthy packing, palletization & worldwide shipping support |
| Faster Global Shipping Routes | Optimized logistics for Middle East, Africa & Southeast Asia |
| Technical & After-Sales Support | Project assistance, documentation & responsive RFQ handling |
| Trusted by Global Steel & EPC Companies | Proven export experience across 50+ countries |
Features of Duplex 2304 EFW Pipe
- ✔ Excellent corrosion resistance in various environments
- ✔ High strength-to-weight ratio, ideal for structural applications
- ✔ Cost-effective alternative to higher alloy stainless steels
- ✔ Good weldability and formability for complex designs
- ✔ Enhanced durability and longevity in service
- ✔ Wide range of sizes and specifications available
Technical Overview of Duplex 2304 EFW Pipe
| Product | Composition | Usage | Standards |
|---|---|---|---|
| Duplex 2304 EFW Pipe | 22% Cr, 4.5% Ni, 0.14% N, balance Fe | Used in applications requiring high strength and corrosion resistance, such as in the oil and gas industry. | ASTM A789, ASTM A790, ASME SA789, ASME SA790 |
| Duplex 2304 EFW Pipe | 22% Cr, 4.5% Ni, 0.14% N, balance Fe | Ideal for seawater applications, chemical processing, and pressure vessels. | EN 10088-1, EN 10028-7 |
| Duplex 2304 EFW Pipe | 22% Cr, 4.5% Ni, 0.14% N, balance Fe | Suitable for high-temperature and high-pressure applications, providing excellent mechanical properties. | ISO 3183, API 5L |
Specifications Table
| Material | Duplex Stainless Steel 2304 |
|---|---|
| Grades | UNS S32304 |
| Standard | ASTM A789 / A790 |
| Size Range | 1/2" to 24" nominal pipe size |
| Length | Custom lengths up to 40 feet |
| Form | Electric Fusion Welded (EFW) |
Available Grades Table
| Product | Composition | Applications |
|---|---|---|
| Duplex 2304 EFW Pipe | Fe, 18% Cr, 4.5% Ni, 0.2% N, Balance Fe | Structural applications, Chemical processing, Oil and gas industry |
| Duplex 2304 EFW Pipe | Fe, 18% Cr, 4.5% Ni, 0.2% N, Balance Fe | Water treatment plants, Marine environments |
| Duplex 2304 EFW Pipe | Fe, 18% Cr, 4.5% Ni, 0.2% N, Balance Fe | Heat exchangers, Piping systems |
| Duplex 2304 EFW Pipe | Fe, 18% Cr, 4.5% Ni, 0.2% N, Balance Fe | Pharmaceutical manufacturing, Food processing |
| Duplex 2304 EFW Pipe | Fe, 18% Cr, 4.5% Ni, 0.2% N, Balance Fe | Fossil fuel energy generation, Desalination plants |
Available Sizes of Duplex 2304 EFW Pipe (MM)
| Size (MM) | Size (MM) |
|---|---|
| 25 | 50 |
| 32 | 65 |
| 40 | 80 |
| 50 | 100 |
| 65 | 125 |
| 80 | 150 |
| 100 | 200 |
| 125 | 250 |
| 150 | 300 |
| 200 | 350 |
Chemical Properties of Duplex 2304 EFW Pipe
| Element | Composition (%) |
|---|---|
| Chromium (Cr) | 18.0 - 20.0 |
| Nickel (Ni) | 4.5 - 6.5 |
| Molybdenum (Mo) | 0.5 - 1.0 |
| Manganese (Mn) | 1.5 - 3.0 |
| Silicon (Si) | 0.5 - 1.0 |
| Carbon (C) | ≤ 0.03 |
| Phosphorus (P) | ≤ 0.03 |
| Sulfur (S) | ≤ 0.01 |
Mechanical Properties of Duplex 2304
| Property | Value |
|---|---|
| Tensile Strength (MPa) | 480 |
| Yield Strength (MPa) | 350 |
| Elongation (%) | 25 |
| Hardness (Rockwell B) | 80 |
| Impact Toughness (J @ -40°C) | 40 |
Duplex 2304 EFW Pipe – Physical & Thermal Properties
Density of Duplex 2304 EFW Pipe
| Property | Metric | Imperial |
|---|---|---|
| Density | 7.8 g/cm³ | 0.28 lb/in³ |
Melting Point of Duplex 2304 EFW Pipe
| Property | Metric | Imperial |
|---|---|---|
| Melting Point | 1400 - 1450 °C | 2550 - 2640 °F |
Specific Heat of Duplex 2304 EFW Pipe
| Specific Heat of Duplex 2304 EFW Pipe | ||
|---|---|---|
| Specific Heat (J/kg·K) | Temperature Range (°C) | Condition |
| 500 | 20 - 200 | Solid |
| 600 | 200 - 400 | Solid |
| 700 | 400 - 800 | Solid |
Electrical Resistivity of Duplex 2304 EFW Pipe
| Electrical Resistivity | ||
|---|---|---|
| Value (µΩ·m) | Temperature (°C) | Treatment or Condition |
| 0.73 | 20 | As Fabricated |
| 0.75 | 100 | |
| 0.78 | 200 | |
| 0.82 | 300 | |
| 0.85 | 400 | |
Equivalent of Duplex 2304 EFW Pipe
| Standard | Werkstoff Nr. | UNS |
|---|---|---|
| EN 1.4362 | 1.4362 | S32304 |
| AISI 2304 | 2304 | S32304 |
Manufacturing Process & Heat Treatment of Duplex 2304 EFW Pipe
Annealing
The annealing process for Duplex 2304 EFW pipe involves heating the material to a temperature range of 1020°C to 1100°C, followed by controlled cooling. This process helps to relieve internal stresses, improve ductility, and enhance corrosion resistance, ensuring optimal mechanical properties for the final product.
Forging
Forging of Duplex 2304 involves shaping the steel using compressive forces, typically at elevated temperatures between 900°C and 1200°C. This process refines the microstructure, improves strength, and enhances the overall durability of the pipe, making it suitable for various industrial applications.
Hardening & Tempering
| Process | Temperature Range (°C) | Quenching Medium | Purpose |
|---|---|---|---|
| Hardening | 950 - 1050 | Water / Oil | Increase hardness and strength |
| Tempering | 300 - 700 | Air | Reduce brittleness and relieve stresses |
| Stress Relieving | 400 - 600 | Air | Eliminate residual stresses from fabrication |
The manufacturing and heat treatment processes of Duplex 2304 EFW pipe are critical in achieving the desired mechanical properties and corrosion resistance, making it an excellent choice for various applications in the oil and gas, chemical processing, and marine industries.
Various Types
Duplex 2304 EFW Pipe - Schedule 10
- Diameter: 1" to 24"
- Condition: Hot Finished, Cold Finished
- Applications: Chemical processing, Oil and gas industries
Duplex 2304 EFW Pipe - Schedule 40
- Diameter: 1" to 30"
- Condition: Pickled and Passivated
- Applications: Water treatment, Marine applications
Duplex 2304 EFW Pipe - Schedule 80
- Diameter: 2" to 12"
- Condition: Seamless
- Applications: Power generation, Desalination plants
Duplex 2304 EFW Pipe - Custom Sizes
- Diameter: Customizable
- Condition: Annealed
- Applications: Food processing, Pharmaceutical industries
Applications & Uses
- Oil & Gas Industry: Pipelines, process piping, and high-pressure fluid handling systems.
- Petrochemical & Refineries: Reactors, heat exchangers, and chemical processing units.
- Water Treatment Plants: Filtration systems, storage tanks, and corrosion-resistant piping.
- Pharmaceutical Industry: Hygienic piping, sanitary fittings, and cleanroom equipment.
- Food & Beverage: Processing lines, storage vessels, and contamination-free pipelines.
- Automobile & Engineering: Exhaust systems, structural parts, and precision components.
- Power & Energy Sector: Boilers, condensers, and turbine piping systems.
- Marine & Offshore: Shipbuilding, offshore platforms, and coastal infrastructure.
- Construction & Infrastructure: Structural frameworks, bridges, and industrial buildings.
Industries We Serve
Our stainless steel, alloy steel, and high-performance metal products are widely used across the following industries:
Latest Price List of Duplex 2304 EFW Pipe
| Material Grade | Thickness | Price (USD / Kg) | Price (INR / Kg) |
|---|---|---|---|
| Duplex 2304 | 3 mm | $2.50 – $3.00 | ₹210 – ₹250 |
| Duplex 2304 | 6 mm | $2.80 – $3.30 | ₹235 – ₹275 |
| Duplex 2304 | 10 mm | $3.10 – $3.60 | ₹260 – ₹300 |
Note: Prices are indicative and may vary based on size, quantity, raw material cost, and delivery location. Contact us for the latest quotation for Duplex 2304 EFW Pipe.
MOQ & Payment Terms
Minimum Order Quantity: 25–100 Kg depending on part size and grade.
Payment Terms: Depending On Grade and Quantity Size
Export Packaging & Shipping
- Seaworthy, fumigated wooden crates with waterproof inner lining
- Palletised packing with clear shipping marks and heat number identification
- Container stuffing supervision with loading photographs available on request
We Exported to 50+ Countries Worldwide
| Global Export Destinations | |||||
|---|---|---|---|---|---|
| United States | Canada | Mexico | United Kingdom | Germany | Netherlands |
| Italy | Spain | South Africa | Australia | India | Korea |
| United Arab Emirates | Saudi Arabia | Qatar | Kuwait | Oman | Bahrain |
| Singapore | Malaysia | Indonesia | Dubai | Riyadh | Dammam |
Our Certifications
We are a certified manufacturer and exporter, committed to strict quality control and international compliance standards. Below are our key certifications.
GST Registered
ISO 9001:2015
ISO 1002:2018
Udyam MSME Registration
Testing Process & Quality Assurance – Ragnar Metals & Tubes
At Ragnar Metals & Tubes, our testing process ensures the safety, reliability, and performance of stainless steel and alloy steel products supplied for global industrial and infrastructure projects. Each batch is verified from raw material selection to final dispatch under internationally recognized standards including ASTM, ASME, ISO, DIN, and EN.
Detects internal flaws using high-frequency sound waves
Measures yield strength, elongation, and material durability
Evaluates toughness under low-temperature and high-stress conditions
Ensures smoothness, coating quality, and visual compliance
Enhances hardness, strength, and corrosion resistance
Measures resistance to deformation and wear
Documentation & Global Compliance
- ✔ EN 10204 3.1 / 3.2 Mill Test Certificates (MTC)
- ✔ Batch-wise quality traceability and inspection records
- ✔ Third-party inspection by SGS, TUV, Bureau Veritas & Lloyd’s
- ✔ Export documentation support for customs and international shipping
Supporting supply for oil & gas, petrochemical, power generation, marine, infrastructure, and heavy engineering industries worldwide.
Related Products
Explore our full range of stainless steel and alloy steel products including pipes, tubes, fittings, flanges, sheets, plates, spools, fasteners, round bars, and special grades manufactured for industrial, infrastructure, and global export applications.
People Also Search For
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Frequently Asked Questions
About Ragnar Metals & Tubes
- ✔ Leading manufacturer, stockist, and exporter of stainless steel and alloy steel products for industrial and infrastructure projects
- ✔ ISO 9001:2015 certified quality management system ensuring consistent product reliability and compliance
- ✔ Specialized in precision pipes, tubes, fittings, flanges, sheets, plates, fasteners, and round bars
- ✔ Modern processing and testing facilities with advanced manufacturing and inspection equipment
- ✔ Custom-engineered solutions based on client drawings and technical specifications
- ✔ Full material traceability with EN 10204 3.1 / 3.2 mill test certification
- ✔ Compliance with ASTM, ASME, DIN, EN, and ISO international standards
- ✔ Trusted global supplier supporting oil & gas, petrochemical, power, marine, and heavy engineering industries