Duplex 2304 EFW Pipe
Duplex 2304 EFW Pipe is a high-performance alloy pipe designed for demanding industrial applications requiring enhanced corrosion resistance and mechanical strength. Manufactured using the Electric Fusion Welding (EFW) process, this pipe combines the benefits of duplex stainless steel grade 2304, which offers a balanced microstructure of austenite and ferrite phases, ensuring superior durability and resistance to stress corrosion cracking.
These pipes are typically produced with precise dimensional tolerances and surface finishes to meet stringent industry standards. Their duplex nature provides excellent resistance to chloride-induced corrosion, making them ideal for use in chemical processing, petrochemical plants, and offshore environments. The EFW technique ensures a consistent and defect-free weld seam, critical for maintaining integrity under high pressure and temperature conditions.
In terms of specifications, the alloy composition generally includes approximately 23% chromium, 4% nickel, and molybdenum, offering a robust combination of corrosion resistance and mechanical performance. The pipes are available in various diameters and wall thicknesses, catering to diverse project requirements. Additionally, these materials conform to international standards such as ASTM A789 or equivalent, facilitating global acceptance.
Applications of these duplex pipes span across industries requiring both strength and corrosion resistance, including oil and gas, power generation, and marine sectors. Their ability to withstand aggressive environments while maintaining structural integrity makes them a preferred choice for pipelines, heat exchangers, and pressure vessels. The balanced microstructure also enhances weldability and formability, reducing fabrication challenges.
Export readiness is a key consideration for suppliers of these pipes, with many offering comprehensive documentation packages, including mill test reports, third-party certifications, and compliance with export regulations. Packaging and handling practices are optimized to protect the product during transit, ensuring that international buyers receive pipes in optimal condition, ready for immediate deployment in their critical projects.
Lead Time
2–7 weeks depending on size
Delivery Terms
FOB, CIF, DDP
Shipping Modes
Sea / Air / Express
Why Duplex 2304 EFW Pipe 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
- 2. How to Choose the Right Manufacturer
- 3.Comparison of Duplex 2304 EFW Pipe
- 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
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
| 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, particularly in chloride environments
- ✔ High strength-to-weight ratio, making it suitable for various applications
- ✔ Good weldability and formability, allowing for easy fabrication
- ✔ Superior toughness at both ambient and cryogenic temperatures
- ✔ Low thermal expansion, minimizing stress during thermal cycling
- ✔ Cost-effective alternative to higher alloy stainless steels
Technical Overview of Duplex 2304 EFW Pipe
| Product | Composition | Usage | Standards |
|---|---|---|---|
| Duplex 2304 EFW Pipe | Fe, 23% Cr, 4% Ni, 0.5% Mo | Used in applications requiring high strength and corrosion resistance, particularly in the oil and gas industry. | ASTM A928, ASTM A790 |
| Duplex 2304 EFW Pipe | Fe, 23% Cr, 4% Ni, 0.5% Mo | Suitable for chemical processing, marine environments, and wastewater treatment. | EN 10088-1, ISO 15156 |
| Duplex 2304 EFW Pipe | Fe, 23% Cr, 4% Ni, 0.5% Mo | Recommended for high-pressure applications and where stress corrosion cracking resistance is critical. | ASME SA790, NACE MR0175 |
Specifications Table
| Material | Duplex Stainless Steel |
|---|---|
| Grades | UNS S32304 |
| Standard | ASTM A789 / A790 |
| Size Range | 1/2" to 24" NPS |
| Length | Up to 40 feet |
| Form | Electric Fusion Welded (EFW) |
Available Grades Table
| Product | Composition | Applications |
|---|---|---|
| Duplex 2304 EFW Pipe | Fe, 18% Cr, 5% Ni, 2% Mo, 0.1% N | Oil and gas industry, chemical processing, marine applications |
| Duplex 2304 EFW Pipe | Fe, 22% Cr, 3% Ni, 0.1% N | Construction, wastewater treatment, food processing |
| Duplex 2304 EFW Pipe | Fe, 20% Cr, 7% Ni, 0.1% N | Heat exchangers, pressure vessels, piping systems |
| Duplex 2304 EFW Pipe | Fe, 21% Cr, 6% Ni, 2% Mo | Pulp and paper industry, pharmaceutical applications |
| Duplex 2304 EFW Pipe | Fe, 19% Cr, 5% Ni, 0.3% N | Marine structures, offshore platforms, desalination plants |
Available Sizes of Duplex 2304 EFW Pipe (MM)
| Size (MM) | Size (MM) |
|---|---|
| 21.3 | 33.4 |
| 42.4 | 48.3 |
| 60.3 | 76.1 |
| 89.0 | 114.3 |
| 139.7 | 168.3 |
| 219.1 | 273.0 |
| 323.9 | 406.4 |
| 508.0 | 610.0 |
| 762.0 | 914.4 |
| 1016.0 | 1200.0 |
Chemical Properties of Duplex 2304 EFW Pipe
| Element | Composition (%) |
|---|---|
| Iron (Fe) | Bal. |
| Chromium (Cr) | 18.0 - 20.0 |
| Nickel (Ni) | 4.5 - 6.5 |
| Manganese (Mn) | 0.5 - 2.0 |
| Silicon (Si) | 0.5 max |
| Carbon (C) | 0.03 max |
| Sulfur (S) | 0.02 max |
| Phosphorus (P) | 0.03 max |
Mechanical Properties of Duplex 2304 EFW Pipe
| Property | Value |
|---|---|
| Tensile Strength (MPa) | 450 - 650 |
| Yield Strength (MPa) | 320 - 500 |
| Elongation (%) | 25 |
| Hardness (HB) | 170 - 250 |
| Impact Toughness (J at -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 | 1380 - 1450 °C | 2516 - 2642 °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 - 100 | Liquid |
| 460 | 100 - 600 | Solid |
| 800 | 1000 - 1400 | Gas |
Electrical Resistivity of Duplex 2304 EFW Pipe
| Electrical Resistivity | ||
|---|---|---|
| Value (µΩ·m) | Temperature (°C) | Treatment or Condition |
| 0.65 | 20 | As Welded |
| 0.70 | 100 | |
| 0.75 | 200 | |
| 0.80 | 300 | |
| 0.85 | 400 | |
Equivalent of Duplex 2304 EFW Pipe
| Standard | Werkstoff Nr. | UNS |
|---|---|---|
| EN 1.4162 | 1.4162 | S32304 |
| AISI 2304 | — | S23040 |
Manufacturing Process & Heat Treatment of Duplex 2304 EFW Pipe
Annealing
The annealing process for Duplex 2304 EFW pipes involves heating the material to a temperature of approximately 1020-1100 °C, followed by a controlled cooling process. This treatment helps to relieve internal stresses, enhance ductility, and improve the overall mechanical properties of the steel. The annealing process also aids in homogenizing the microstructure, which is crucial for the performance of the duplex stainless steel in various applications.
Forging
Forging of Duplex 2304 involves shaping the steel through deformation processes at elevated temperatures. Typically performed at temperatures around 1100-1200 °C, forging enhances the mechanical properties by refining the grain structure and improving the strength and toughness of the material. This process is essential for producing high-quality pipes that can withstand harsh environments and high-pressure applications.
Hardening & Tempering
| Process | Temperature Range (°C) | Quenching Medium | Purpose |
|---|---|---|---|
| Hardening | 1020-1100 | Water or Oil | To increase hardness and strength by transforming the microstructure |
| Tempering | 400-600 | Air | To reduce brittleness and improve toughness after hardening |
| Stabilization | 600-800 | Air | To enhance resistance to intergranular corrosion and stabilize the microstructure |
In conclusion, the manufacturing and heat treatment processes of Duplex 2304 EFW pipes are critical to achieving the desired mechanical properties and performance characteristics. Proper annealing, forging, and hardening & tempering ensure that the pipes can effectively meet the demands of various industrial applications.
Various Types
Duplex 2304 EFW Pipe - Standard
- OD: 1" to 24", WT: 1/8" to 1"
- Condition: Annealed
- Applications: Oil and Gas, Chemical Processing
Duplex 2304 EFW Pipe - High Pressure
- OD: 1" to 12", WT: 1" to 2"
- Condition: Pickled and Passivated
- Applications: Power Generation, Marine Environments
Duplex 2304 EFW Pipe - Special Alloy
- OD: 3" to 16", WT: 0.5" to 1.5"
- Condition: Hot Finished
- Applications: Pulp and Paper, Wastewater Treatment
Duplex 2304 EFW Pipe - Custom Lengths
- OD: Custom Sizes Available
- Condition: Cold Worked
- Applications: Construction, Structural Applications
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 EFW Pipe | 3 mm | $2.50 – $2.80 | ₹207 – ₹232 |
| Duplex 2304 EFW Pipe | 6 mm | $2.60 – $2.90 | ₹215 – ₹240 |
| Duplex 2304 EFW Pipe | 10 mm | $2.70 – $3.00 | ₹223 – ₹248 |
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
- Duplex 2205 EFW Pipe
- Stainless Steel 316L Pipe
- Duplex 2507 EFW Pipe
- Welded Stainless Steel Pipe
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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