Duplex S31803 Spool exporter in Qatar
Duplex S31803 Spool exporter in Qatar specializes in providing high-quality duplex stainless steel spools known for their exceptional corrosion resistance and mechanical strength. These spools are fabricated from S31803 duplex stainless steel, a material that combines austenitic and ferritic properties, offering superior performance in demanding industrial environments. Their balanced microstructure ensures enhanced durability and resistance to stress corrosion cracking, making them ideal for critical applications.
Manufactured to precise specifications, these spools are designed to meet rigorous industry standards such as ASTM A182 and A276, ensuring reliability and consistency. The duplex grade S31803 material typically features a composition of 22% chromium, 5-6% nickel, and 3% molybdenum, which contributes to its excellent resistance against chloride-induced corrosion. This makes the spools highly suitable for use in sectors such as oil and gas, petrochemical, and marine industries where exposure to harsh environments is common.
These stainless steel spools are engineered for seamless integration into piping systems, offering robust performance under high pressure and temperature conditions. The export process from Qatar involves strict quality control measures, including dimensional accuracy, weld integrity, and surface finish standards, ensuring the product arrives ready for immediate deployment. Packaging is optimized to protect against mechanical damage and environmental factors during transit.
Industrial buyers seeking duplex stainless steel components can rely on these spools for their longevity and structural integrity. The combination of corrosion resistance and mechanical toughness makes them a cost-effective choice for infrastructure projects requiring long-term reliability. Exporters in Qatar are well-equipped to handle bulk orders, providing customized solutions to meet specific project requirements and delivery timelines.
With a focus on export readiness, these S31803 duplex stainless steel spools are accompanied by comprehensive documentation, including material test reports and compliance certificates. This facilitates smooth customs clearance and adherence to international quality standards, making them a preferred option for global industrial procurement professionals looking for dependable piping components.
Lead Time
2–7 weeks depending on size
Delivery Terms
FOB, CIF, DDP
Shipping Modes
Sea / Air / Express
Why Duplex S31803 Spool exporter in Qatar 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 in Qatar
- 2. How to Choose the Right Manufacturer
- 3.Comparison of Duplex S31803 Spool exporter in Qatar
- 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 in Qatar
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 in Qatar
| 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 harsh environments
- ✔ High strength and durability
- ✔ Good weldability and formability
- ✔ Cost-effective alternative to higher grade stainless steels
- ✔ Suitable for a wide range of applications including oil and gas
- ✔ Availability in various sizes and dimensions
Technical Overview of Duplex S31803
| Product | Composition | Usage | Standards |
|---|---|---|---|
| Duplex S31803 Spool | 22% Cr, 5% Ni, 3.2% Mo, 0.17% N | Oil and gas, chemical processing, marine applications | ASTM A790, ASME SA790 |
| Duplex S31803 Pipe Fittings | 22% Cr, 5% Ni, 3.2% Mo, 0.17% N | High strength and corrosion resistance in harsh environments | ASTM A815, ASME SA815 |
| Duplex S31803 Flanges | 22% Cr, 5% Ni, 3.2% Mo, 0.17% N | Used in pressure applications where high strength is required | ASTM A182, ASME SA182 |
Specifications Table
| Material | Duplex S31803 |
|---|---|
| Grades | S31803 |
| Standard | ASTM A790 / A928 |
| Size Range | 1/2" to 24" |
| Length | Up to 12 meters |
| Form | Spool |
Available Grades Table
| Product | Composition | Applications |
|---|---|---|
| Duplex S31803 | 24% Cr, 4% Ni, 3% Mo, 0.17% N | Oil and gas, chemical processing, marine applications |
| Duplex S32205 | 22% Cr, 5% Ni, 3% Mo, 0.18% N | Pulp and paper, water treatment, petrochemical industries |
| Duplex S32760 | 25% Cr, 7% Ni, 4% Mo, 0.3% N | High chloride environments, offshore platforms |
| Duplex S32550 | 25% Cr, 6% Ni, 3.5% Mo, 0.2% N | Power generation, oil and gas, pulp and paper |
| Duplex S31803 LDX | 22% Cr, 5% Ni, 3% Mo, 0.2% N | Structural applications, food processing, desalination |
Available Sizes of Duplex S31803 (MM)
| Size (MM) | Size (MM) |
|---|---|
| 25 | 50 |
| 32 | 63 |
| 40 | 76 |
| 50 | 89 |
| 63 | 102 |
| 76 | 114 |
| 89 | 140 |
| 102 | 168 |
| 114 | 200 |
| 140 | 250 |
Chemical Properties of Duplex S31803
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.03 max |
| Manganese (Mn) | 2.00 max |
| Silicon (Si) | 1.00 max |
| Chromium (Cr) | 22.0 - 23.0 |
| Nickel (Ni) | 4.5 - 6.5 |
| Molybdenum (Mo) | 3.0 - 3.5 |
| Nitrogen (N) | 0.08 - 0.2 |
| Iron (Fe) | Balance |
Mechanical Properties of Duplex S31803
| Property | Value |
|---|---|
| Tensile Strength (MPa) | 620 - 800 |
| Yield Strength (MPa) | 450 - 600 |
| Elongation (%) | 25 |
| Hardness (HB) | 250 - 300 |
| Impact Toughness (J) | 50 (minimum at -50°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 |
| 600 | 100 - 300 | High Temperature |
| 700 | 300 - 600 | Very High Temperature |
Electrical Resistivity of Duplex S31803
| Electrical Resistivity | ||
|---|---|---|
| Value (µΩ·m) | Temperature (°C) | Treatment or Condition |
| 0.72 | 20 | As-Received Condition |
| 0.75 | 100 | |
| 0.78 | 200 | |
| 0.80 | 300 | |
| 0.82 | 400 | |
Equivalent of Duplex S31803
| Standard | Werkstoff Nr. | UNS |
|---|---|---|
| ASTM A789 | 1.4462 | S31803 |
| ASTM A790 | 1.4462 | S31803 |
Manufacturing Process & Heat Treatment of Duplex S31803
Annealing
The annealing process for Duplex S31803 involves heating the material to a temperature range of 1020-1100°C, followed by a controlled cooling process. This treatment helps to relieve internal stresses, improve ductility, and refine the microstructure, ultimately enhancing the mechanical properties of the steel.
Forging
Forging of Duplex S31803 is typically performed at temperatures between 1100-1200°C. This process involves shaping the material through compressive forces, leading to improved strength and toughness. The forging process also enhances the uniformity of the microstructure, which is critical for the performance of the final product.
Hardening & Tempering
| Process | Temperature Range (°C) | Quenching Medium | Purpose |
|---|---|---|---|
| Hardening | 1000-1100 | Water or Oil | To increase hardness and strength |
| Tempering | 600-800 | Air | To reduce brittleness and improve toughness |
| Stress Relieving | 300-500 | Air | To relieve residual stresses |
The manufacturing and heat treatment processes for Duplex S31803 are critical in achieving the desired mechanical properties and corrosion resistance, making it suitable for various industrial applications, especially in the oil and gas sector.
Various Types
Duplex S31803 Spool - Standard
- Diameter: 2 inches, Length: 5 feet
- Condition: Hot Finished
- Applications: Oil & Gas, Chemical Processing
Duplex S31803 Spool - Customized
- Diameter: 3 inches, Length: 10 feet
- Condition: Cold Drawn
- Applications: Power Generation, Desalination Plants
Duplex S31803 Spool - High Pressure
- Diameter: 4 inches, Length: 8 feet
- Condition: Annealed
- Applications: Petrochemical, Water Treatment
Duplex S31803 Spool - Low Temperature
- Diameter: 6 inches, Length: 12 feet
- Condition: Pickled & Passivated
- Applications: LNG, Cryogenic Services
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
| Material Grade | Thickness | Price (USD / Kg) | Price (INR / Kg) |
|---|---|---|---|
| Duplex S31803 | 3 mm | $2.50 – $3.00 | ₹207 – ₹248 |
| Duplex S31803 | 6 mm | $2.40 – $2.90 | ₹199 – ₹241 |
| Duplex S31803 | 10 mm | $2.30 – $2.80 | ₹192 – ₹233 |
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.
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