Duplex S31803 Spool exporter in Kuwait
Duplex S31803 Spool exporter in Kuwait offers high-quality stainless steel components designed to meet the rigorous demands of industrial applications. These spools, manufactured from Duplex S31803 stainless steel, are known for their excellent corrosion resistance, high strength, and durability. This material combines the benefits of both austenitic and ferritic stainless steel, making it ideal for use in environments where superior mechanical properties and resistance to stress corrosion cracking are essential.
These Duplex stainless steel spools are widely used in sectors such as oil and gas, petrochemical, desalination plants, and marine industries. Their duplex microstructure provides enhanced resistance to chloride-induced corrosion, making them suitable for piping systems exposed to harsh chemicals and saline environments. The spools are precision-fabricated to ensure tight dimensional tolerances and reliable performance under high pressure and temperature conditions.
Manufacturers supplying these spools adhere to international standards such as ASTM A790 and ASME specifications, ensuring that each product meets stringent quality and safety requirements. The spools are available in various sizes and configurations to accommodate complex piping layouts and facilitate easy installation. Additionally, non-destructive testing and rigorous quality control measures are implemented to guarantee the integrity and longevity of each spool.
Export readiness is a key aspect of suppliers in Kuwait, who ensure that packaging, documentation, and logistics are handled efficiently to support seamless international shipping. This includes compliance with global trade regulations and prompt delivery schedules to meet project timelines. Industrial buyers can rely on these exporters for consistent supply, technical support, and customization options tailored to specific project needs.
Lead Time
2–7 weeks depending on size
Delivery Terms
FOB, CIF, DDP
Shipping Modes
Sea / Air / Express
Why Duplex S31803 Spool exporter in Kuwait 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 Kuwait
- 2. How to Choose the Right Manufacturer
- 3.Comparison of Duplex S31803 Spool exporter in Kuwait
- 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 Kuwait
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 Kuwait
| 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 a variety of environments
- ✔ High strength and durability, ideal for demanding applications
- ✔ Good weldability, allowing for efficient fabrication processes
- ✔ Superior mechanical properties at both room and elevated temperatures
- ✔ Cost-effective solution due to longevity and reduced maintenance
- ✔ Compliance with international standards for quality and performance
Technical Overview of Duplex S31803
| Product | Composition | Usage | Standards |
|---|---|---|---|
| Duplex S31803 Spool | 22% Cr, 5% Ni, 3% Mo, 0.17% N | Oil and Gas, Chemical Processing | ASTM A790, ASME SA790 |
| Duplex S31803 Spool | 22% Cr, 5% Ni, 3% Mo, 0.17% N | Pipelines, Pressure Vessels | API 5L, NACE MR0175 |
| Duplex S31803 Spool | 22% Cr, 5% Ni, 3% Mo, 0.17% N | Marine Applications, Heat Exchangers | ISO 15156, EN 10088 |
Specifications Table
| Material | Duplex S31803 |
|---|---|
| Grades | S31803 |
| Standard | ASTM A789 / A790 |
| Size Range | 1" to 24" (DN25 to DN600) |
| Length | Up to 12 meters |
| Form | Spool |
Available Grades Table
| Product | Composition | Applications |
|---|---|---|
| Duplex S31803 | Fe, 22% Cr, 5% Ni, 3% Mo | Oil and gas, chemical processing |
| Duplex S32205 | Fe, 22% Cr, 5.5% Ni, 3% Mo | Marine applications, pulp and paper |
| Duplex S32750 | Fe, 25% Cr, 7% Ni, 4% Mo | High-strength applications, petrochemical |
| Duplex S32550 | Fe, 25% Cr, 6% Ni, 5% Mo | Desalination, oil and gas |
| Duplex S31803N | Fe, 22% Cr, 5% Ni, 3% Mo, N | High-stress applications, offshore platforms |
Available Sizes of Duplex S31803 (MM)
| Size (MM) | Size (MM) |
|---|---|
| 15 | 20 |
| 25 | 32 |
| 40 | 50 |
| 63 | 76 |
| 90 | 100 |
| 110 | 125 |
| 150 | 200 |
| 250 | 300 |
| 350 | 400 |
| 450 | 500 |
Chemical Properties of Duplex S31803
| Element | Composition (%) |
|---|---|
| Iron (Fe) | 61.0 - 68.0 |
| Chromium (Cr) | 22.0 - 23.0 |
| Nickel (Ni) | 4.5 - 6.5 |
| Molybdenum (Mo) | 2.5 - 3.5 |
| Manganese (Mn) | 0.8 - 1.5 |
| Silicon (Si) | 0.5 - 1.0 |
| Carbon (C) | ≤ 0.03 |
| Sulfur (S) | ≤ 0.01 |
Mechanical Properties of Duplex S31803
| Property | Value |
|---|---|
| Tensile Strength (MPa) | 620 |
| Yield Strength (MPa) | 450 |
| Elongation (%) | 25 |
| Hardness (HB) | 290 |
| Impact Toughness (J) | 50 |
Duplex S31803 – Physical & Thermal Properties
Density of Duplex S31803
| Property | Metric | Imperial |
|---|---|---|
| Density | 7.8 g/cm³ | 0.283 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 |
| 0.75 | 20 | As-rolled |
| 0.80 | 100 | |
| 0.85 | 200 | |
| 0.90 | 300 | |
| 0.95 | 400 | |
Equivalent of Duplex S31803
| Standard | Werkstoff Nr. | UNS |
|---|---|---|
| ASTM A790 | 1.4462 | S31803 |
| EN 10088-3 | 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°C to 1100°C, followed by controlled cooling. This process helps to relieve stresses, improve ductility, and enhance the overall microstructure of the steel, ensuring optimal performance in various applications.
Forging
Forging of Duplex S31803 is typically performed at temperatures between 1100°C and 1250°C. This process enhances the mechanical properties of the material through deformation, resulting in improved strength, toughness, and resistance to fatigue. The forged components are then subjected to appropriate cooling methods to preserve the desired microstructure.
Hardening & Tempering
| Process | Temperature Range (°C) | Quenching Medium | Purpose |
|---|---|---|---|
| Hardening | 1020 - 1100 | Oil or Water | To increase hardness and strength of the material. |
| Tempering | 600 - 800 | Air | To reduce brittleness and improve toughness. |
| Stabilization | 500 - 600 | Air | To enhance corrosion resistance and stabilize the microstructure. |
The manufacturing and heat treatment processes for Duplex S31803 are critical in achieving the desired mechanical properties and corrosion resistance, making it suitable for demanding applications in various industries.
Various Types
Duplex S31803 Spool - Standard
- Diameter: 2 inch, Length: 6 meter
- Condition: Hot Finished
- Applications: Oil and Gas, Chemical Processing
Duplex S31803 Spool - Custom
- Diameter: 3 inch, Length: 4 meter
- Condition: Cold Drawn
- Applications: Marine, Pulp and Paper
Duplex S31803 Spool - High Pressure
- Diameter: 4 inch, Length: 5 meter
- Condition: Annealed
- Applications: Power Generation, Desalination
Duplex S31803 Spool - Large Diameter
- Diameter: 6 inch, Length: 3 meter
- Condition: Pickled and Passivated
- Applications: Structural, Heat Exchangers
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 | $3.50 – $4.00 | ₹290 – ₹330 |
| Duplex S31803 | 6 mm | $3.30 – $3.80 | ₹270 – ₹320 |
| Duplex S31803 | 10 mm | $3.10 – $3.60 | ₹250 – ₹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 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