Duplex S31803 Spool exporter
Duplex S31803 Spool exporter specializes in supplying high-quality duplex stainless steel spools tailored for demanding industrial applications. These spools are fabricated from Duplex S31803, a duplex stainless steel grade known for its excellent corrosion resistance, high tensile strength, and superior weldability. The material combines austenitic and ferritic stainless steel properties, making it ideal for use in aggressive environments such as chemical processing, oil and gas, and marine industries.
The spools are precision-engineered components consisting of pipes and fittings pre-assembled to streamline installation processes. Manufactured under stringent quality control measures, they meet international standards such as ASTM A789 and EN 10222-5, ensuring durability and compliance with global industrial requirements. The duplex steel offers a balanced microstructure that enhances resistance to stress corrosion cracking and pitting, critical for maintaining integrity in harsh conditions.
Widely used in pipeline construction and fluid transportation systems, these spools are suitable for applications requiring high mechanical strength and resistance to chloride-induced corrosion. Their robust nature allows them to perform efficiently in high-pressure and high-temperature environments, making them a preferred choice for refineries, petrochemical plants, and offshore platforms. Additionally, the spools' design facilitates easy customization to meet specific project demands.
Export readiness is a key feature, with the supplier ensuring all products are packaged and documented according to international shipping standards. This includes thorough inspection reports, material test certificates, and compliance with export regulations to guarantee seamless transit and delivery. The exporter’s global logistics network supports timely dispatch and handling, ensuring that industrial buyers receive their orders promptly and in optimal condition.
For industrial buyers seeking reliable and corrosion-resistant duplex stainless steel spools, sourcing from a dedicated exporter offers the advantage of quality assurance, technical support, and tailored solutions. These spools not only enhance operational efficiency but also provide long-term value in critical infrastructure projects across various sectors worldwide.
Lead Time
2–7 weeks depending on size
Delivery Terms
FOB, CIF, DDP
Shipping Modes
Sea / Air / Express
Why Duplex S31803 Spool exporter 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 S31803 Spool exporter
- 2. How to Choose the Right Manufacturer
- 3.Comparison of Duplex S31803 Spool exporter
- 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 S31803 Spool exporter
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 S31803 Spool exporter
| 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 S31803 Spool
- ✔ Excellent corrosion resistance in aggressive environments
- ✔ High strength and durability for challenging applications
- ✔ Superior weldability for ease of installation
- ✔ Good mechanical properties at elevated temperatures
- ✔ Cost-effective solution compared to other materials
- ✔ Compliance with international standards for quality assurance
Technical Overview of Duplex S31803 Spool
| Product | Composition | Usage | Standards |
|---|---|---|---|
| Duplex S31803 Spool | 22% Cr, 5.5% Ni, 3.2% Mo, 0.17% N | Used in piping systems for oil and gas applications | ASTM A790, ASME SA790 |
| Duplex S31803 Spool | 22% Cr, 5.5% Ni, 3.2% Mo, 0.17% N | Suitable for high strength and corrosion resistance | API 5L, ISO 15156 |
| Duplex S31803 Spool | 22% Cr, 5.5% Ni, 3.2% Mo, 0.17% N | Ideal for environments with chloride exposure | EN 10216-5, NACE MR0175 |
Specifications Table
| Material | Duplex S31803 |
|---|---|
| Grades | S31803 |
| Standard | ASTM A790 |
| Size Range | 1" to 24" nominal pipe size |
| Length | Custom lengths available up to 40 feet |
| Form | Spool |
Available Grades Table
| Product | Composition | Applications |
|---|---|---|
| Duplex S31803 | Fe, 22% Cr, 5.5% Ni, 3.2% Mo | Oil and gas, chemical processing, marine environments |
| Duplex S32205 | Fe, 22% Cr, 5.5% Ni, 3.2% Mo | Structural applications, pressure vessels, heat exchangers |
| Duplex S32750 | Fe, 25% Cr, 7% Ni, 4% Mo | Seawater applications, pulp and paper industry |
| Duplex S32550 | Fe, 26% Cr, 6% Ni, 3.5% Mo | Oil and gas production, desalination plants |
| Duplex S31803 L | Fe, 22% Cr, 5.5% Ni, 3% Mo | Food processing, pharmaceutical applications |
Available Sizes of Duplex S31803 (MM)
| Size (MM) | Size (MM) |
|---|---|
| 25 | 50 |
| 32 | 63 |
| 40 | 76 |
| 50 | 89 |
| 63 | 102 |
| 76 | 114 |
| 89 | 127 |
| 102 | 140 |
| 114 | 168 |
| 140 | 219 |
Chemical Properties of Duplex S31803
| Element | Composition (%) |
|---|---|
| Chromium (Cr) | 22.0 - 23.0 |
| Nickel (Ni) | 4.5 - 6.5 |
| Molybdenum (Mo) | 3.0 - 3.5 |
| Titanium (Ti) | 0.1 - 0.3 |
| Manganese (Mn) | 1.0 max |
| Silicon (Si) | 0.8 max |
| Carbon (C) | 0.03 max |
| Sulfur (S) | 0.01 max |
Mechanical Properties of Duplex S31803
| Property | Value |
|---|---|
| Tensile Strength | 620 MPa (90 ksi) |
| Yield Strength | 450 MPa (65 ksi) |
| Elongation | 25% |
| Hardness (HB) | 250 HB |
| Impact Toughness (Charpy V-notch) | 50 J at -40°C |
Duplex S31803 – Physical & Thermal Properties
Density of Duplex S31803
| Property | Metric | Imperial |
|---|---|---|
| Density | 7.8 g/cm³ | 0.28 lb/in³ |
Melting Point of Duplex S31803
| Property | Metric | Imperial |
|---|---|---|
| Melting Point | 1400 - 1450 °C | 2552 - 2642 °F |
Specific Heat of Duplex S31803
| Specific Heat of Duplex S31803 | ||
|---|---|---|
| Specific Heat (J/kg·K) | Temperature Range (°C) | Condition |
| 500 | 20 - 100 | Room Temperature |
| 470 | 100 - 400 | Intermediate Temperature |
| 450 | 400 - 800 | High Temperature |
Electrical Resistivity of Duplex S31803
| Electrical Resistivity | ||
|---|---|---|
| Value (µΩ·m) | Temperature (°C) | Treatment or Condition |
| 0.75 | 20 | As-rolled |
| 0.77 | 100 | |
| 0.80 | 200 | |
| 0.82 | 300 | |
| 0.85 | 400 | |
Equivalent of Duplex S31803
| Standard | Werkstoff Nr. | UNS |
|---|---|---|
| ASTM A790 | 1.4462 | S31803 |
| EN 10088-1 | X5CrNiMoN 22-5-3 | S31803 |
Manufacturing Process & Heat Treatment of Duplex S31803
Annealing
Annealing of Duplex S31803 involves heating the material to a temperature range of 1020°C to 1100°C, followed by a controlled cooling process. This treatment helps to relieve internal stresses, improve ductility, and homogenize the microstructure, ensuring optimal mechanical properties for subsequent processing.
Forging
Forging of Duplex S31803 is carried out at elevated temperatures between 1100°C and 1200°C. This process enhances the mechanical properties by refining grain structure and improving strength. The material is shaped using various forging techniques such as open die forging and closed die forging, depending on the final application requirements.
Hardening & Tempering
| Process | Temperature Range (°C) | Quenching Medium | Purpose |
|---|---|---|---|
| Hardening | 1020 - 1100 | Water or Oil | Increase hardness and strength |
| Tempering | 600 - 800 | Air | Reduce brittleness and improve toughness |
| Stabilization | 750 - 800 | Air | Enhance corrosion resistance and stabilize microstructure |
The combination of these manufacturing and heat treatment processes ensures that Duplex S31803 spools possess the required mechanical properties and corrosion resistance, making them suitable for various industrial applications, including oil and gas, chemical processing, and marine environments.
Various Types
Duplex S31803 Spool 1
- Diameter: 2 inches, Length: 10 feet
- Condition: New
- Applications: Oil and Gas, Chemical Processing
Duplex S31803 Spool 2
- Diameter: 4 inches, Length: 12 feet
- Condition: New
- Applications: Marine Applications, Wastewater Treatment
Duplex S31803 Spool 3
- Diameter: 3 inches, Length: 15 feet
- Condition: New
- Applications: Power Generation, Desalination Plants
Duplex S31803 Spool 4
- Diameter: 5 inches, Length: 8 feet
- Condition: New
- Applications: Pulp and Paper, Pharmaceutical Industry
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 S31803 Spool
| Material Grade | Thickness | Price (USD / Kg) | Price (INR / Kg) |
|---|---|---|---|
| Duplex S31803 Spool | 3 mm | $4.50 – $5.00 | ₹370 – ₹410 |
| Duplex S31803 Spool | 6 mm | $4.80 – $5.30 | ₹400 – ₹430 |
| Duplex S31803 Spool | 10 mm | $5.00 – $5.60 | ₹410 – ₹450 |
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 S31803 Spool.
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 S32205 Pipe Supplier
- Super Duplex S32750 Flange Manufacturer
- Duplex Stainless Steel S31803 Fittings Exporter
- Duplex S31803 Sheet Stockist
- Duplex S31803 Bar Distributor
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