Duplex S31803 Spool exporter in Spain
Duplex S31803 Spool exporter in Spain specializes in delivering high-grade duplex stainless steel components compliant with ASTM A182 and EN 10204 standards. Their products meet stringent quality requirements for corrosion resistance and mechanical strength.
The spools are fabricated using precise welding techniques and undergo rigorous non-destructive testing, including radiographic and ultrasonic inspections, ensuring integrity for critical industrial applications. These components are widely used in chemical processing, oil and gas, and marine sectors.
Export operations are managed with strict adherence to international logistics protocols, ensuring timely delivery and secure handling. Packaging is designed to prevent damage during transit and to comply with customs regulations across global markets.
Quality assurance includes traceability documentation and certification to guarantee compliance with international standards. This exporter maintains a robust supply chain to support large-scale industrial projects requiring reliable duplex stainless steel spools.
Global Delivery & Export Assurance
Trusted by EPC contractors, OEMs, and industrial buyers in 40+ countries
β± Fast Lead Time
2β7 weeks depending on size & specification
Expedited production available on requestπ¦ Flexible Delivery Terms
FOB, CIF, CFR, DDP (Incoterms 2020)
Door-to-port and door-to-door optionsβοΈ Global Shipping
Sea Freight / Air Cargo / Express Courier
Export documentation & tracking includedRequest Export Pricing for Duplex S31803 Spool exporter in Spain
Trusted by EPC contractors, procurement teams, and global industrial buyers across 50+ countries for certified supply and on-time delivery.
Manufacturer Pricing
Factory-direct rates with bulk stock availability to reduce your total landed cost.
International Certifications
ISO, EN 10204 3.1, SGS & TPI approved with mill test certificates on every shipment.
Export-Ready Packaging
Sea-worthy, container-ready packaging for safe international transit and on-time delivery.
Table of Contents
- 1. What is Duplex S31803 Spool exporter in Spain
- 2. Why Choose Ragnar Pipe and Tube
- 3. Export Delivery & Lead Time Information
- 4. How to Choose the Right Manufacturer
- 5. Comparison of Duplex S31803 Spool exporter in Spain
- 6. Why Global Buyers Source from Ragnar Metal and Tube
- 7. Features
- 8. Technical Overview
- 9. Specifications
- 10. Available Grades
- 11. Available Sizes
- 12. Chemical Properties
- 13. Mechanical Properties
- 14. Physical & Thermal Properties
- 15. Electrical Resistivity
- 16. Equivalent Grades
- 17. Manufacturing Process & Heat Treatment
- 18. Various Types
- 19. Applications & Uses
- 20. Industries We Serve
- 21. Latest Price List
- 22. MOQ & Payment Terms
- 23. Export Packaging & Shipping
- 24. Cities We Supply in India
- 25. Countries We Export Worldwide
- 26. Our Certifications
- 27. Quality Inspection & Testing
- 28. Our Other Product Types
- 29. People Also Search For
- 30. Frequently Asked Questions
- 31. About Ragnar Metal and Tube
How to Choose the Right Supplier for Duplex S31803 Spool exporter in Spain
Choosing the right supplier for Duplex S31803 Spool exporter in Spain plays a critical role in ensuring product quality, project safety, and long-term cost efficiency. With a wide range of manufacturers, stockists, and exporters operating across India, buyers must look beyond pricing and focus on reliability, certifications, and export readiness.
At Ragnar Metals & Tubes, we support global EPC contractors, procurement managers, and industrial buyers by delivering fully certified, traceable, and export-compliant metal products that meet international standards and country-specific import regulations.
- International standards compliance β ASTM, ASME, EN, ISO, and EN 10204 3.1 material test certification
- Verified manufacturing and sourcing β Direct mill supply, in-house processing, and strict quality inspections
- Inspection and export documentation β SGS, TPI, BV, and customs-ready paperwork for smooth international clearance
- Stock availability and delivery timelines β Reliable lead times for urgent, bulk, and project-based requirements
- Global project experience β Proven supply for oil & gas, EPC, petrochemical, power generation, and heavy engineering industries
Comparison Guide for Duplex S31803 Spool exporter in Spain
Understand the key differences between local suppliers, trading firms, and ISO-certified manufacturers to make informed sourcing decisions for international and domestic projects.
| Evaluation Factor | Small Local Suppliers | Trading Companies | ISO-Certified Manufacturers |
|---|---|---|---|
| Manufacturing Control | Limited in-house processing | Dependent on third-party mills | Full in-house production or audited partner facilities |
| International Standards | Basic or regional compliance | Varies by sourcing mill | ASTM, ASME, EN, ISO certified materials |
| Inspection & Certification | Limited documentation | Inconsistent MTC availability | EN 10204 3.1 / 3.2, SGS, TPI, BV support |
| Export & Logistics Experience | Low or domestic-only | Moderate international handling | Established exports to 50+ countries |
| Project Risk Level | High | Medium | Low |
For critical applications in oil & gas, EPC, power generation, marine, and infrastructure projects, buyers typically prioritize ISO-certified manufacturers to ensure compliance, traceability, and long-term performance.
Why Global Buyers Partner with Ragnar Metals & Tubes
Ragnar Metals & Tubes is a globally trusted manufacturer, stockist, and exporter of stainless steel, duplex steel, alloy steel, and high-performance piping solutions supporting EPC contractors, industrial plants, and infrastructure projects across the Middle East, Europe, Africa, Southeast Asia, and the Americas . Our strength lies in technical expertise, certified quality systems, and export-focused supply chains designed for long-term project reliability.
| Ragnar Advantage | How It Benefits You |
|---|---|
| ISO-Certified Quality Management Systems | Documented inspection, traceability, and process controls ensure consistent material performance and compliance. |
| ASTM, ASME & EN Standard Compliance | Internationally approved specifications with EN 10204 3.1 / 3.2 mill test certificates for project and regulatory acceptance. |
| Strategic Stockholding & Production Partnerships | Faster lead times and stable supply for shutdowns, expansions, and large-scale EPC requirements. |
| Global Export & Documentation Expertise | Complete handling of COO, HS codes, packing lists, invoices, and third-party inspections for smooth customs clearance. |
| In-House & Third-Party Quality Verification | Chemical, mechanical, and dimensional testing supported by SGS, TPI, BV, and client-nominated agencies. |
| Custom Manufacturing & Project-Based Supply | Drawing-based production, special lengths, and grade substitutions engineered to match site and design requirements. |
| Export-Grade Packaging & Container Planning | Sea-worthy packing, fumigated pallets, and optimized container loading to minimize transit damage and logistics costs. |
| Multi-Industry Project Experience | Proven supply for oil & gas, power generation, marine, petrochemical, water treatment, and heavy engineering sectors. |
| Responsive RFQ & Technical Support Team | Fast quotations, material selection guidance, and documentation support throughout the procurement lifecycle. |
| Established Global Supply Network | Reliable exports to 50+ countries with repeat buyers and long-term project partnerships. |
Key Features of Duplex S31803 Spool
- β High corrosion resistance in various environments
- β Excellent mechanical properties at both room and elevated temperatures
- β Enhanced toughness, making it suitable for demanding applications
- β Cost-effective solution compared to other duplex grades
- β Availability in various sizes and dimensions to meet project requirements
- β Compliance with international standards and certifications
Technical Overview of Duplex S31803
| Product | Composition | Usage | Standards |
|---|---|---|---|
| Pipes | Fe, 22% Cr, 5% Ni, 3% Mo | Used in oil and gas industries for pipeline construction | ASTM A790 / EN 10216-5 / UNS S31803 |
| Tubes | Fe, 22% Cr, 5% Ni, 3% Mo | Applied in heat exchangers and pressure vessels | ASTM A789 / EN 10216-5 / UNS S31803 |
| Fittings | Fe, 22% Cr, 5% Ni, 3% Mo | Utilized in construction of piping systems and structures | ASTM A815 / EN 10241 / UNS S31803 |
Specifications Table
| Material | Duplex S31803 |
|---|---|
| Grades | S31803, S32205 |
| Standard | ASTM A790, ASTM A928 |
| Size Range | 1/2" to 24" (DN15 to DN600) |
| Length | Up to 6 meters |
| Form | Spool |
Available Grades Table
| Product | Composition | Applications |
|---|---|---|
| Pipes | Fe, 22% Cr, 5% Ni, 3% Mo, 0.17% N | Oil and gas transport |
| Tubes | Fe, 22% Cr, 5% Ni, 3% Mo, 0.17% N | Heat exchangers |
| Fittings | Fe, 22% Cr, 5% Ni, 3% Mo, 0.17% N | Piping systems in chemical plants |
| Bars | Fe, 22% Cr, 5% Ni, 3% Mo, 0.17% N | Structural components in marine environments |
| Plates | Fe, 22% Cr, 5% Ni, 3% Mo, 0.17% N | Construction and fabrication of tanks |
Available Sizes of Duplex S31803 Spool (MM)
| Size (MM) | Size (MM) |
|---|---|
| 25 | 50 |
| 32 | 60 |
| 40 | 75 |
| 50 | 90 |
| 63 | 100 |
| 76 | 120 |
| 90 | 150 |
| 100 | 200 |
| 150 | 250 |
| 200 | 300 |
Chemical Properties of Duplex S31803
| Element | Composition (%) |
|---|---|
| Chromium (Cr) | 21.0 - 23.0 |
| Nickel (Ni) | 4.5 - 6.5 |
| Molybdenum (Mo) | 2.5 - 3.5 |
| Titanium (Ti) | 0.1 - 0.5 |
| Carbon (C) | 0.03 max |
| Manganese (Mn) | 0.8 - 1.5 |
| Silicon (Si) | 0.5 max |
| Phosphorus (P) | 0.03 max |
| Sulfur (S) | 0.02 max |
Mechanical Properties of Duplex S31803
| Property | Value |
|---|---|
| Tensile Strength | 620 - 800 MPa |
| Yield Strength | 450 - 600 MPa |
| Elongation | 25% (min) |
| Hardness | Max 320 HB |
| Impact Energy (Charpy V-notch) | β₯ 40 J at -50Β°C |
Duplex S31803 β Physical & Thermal Properties
Density of Duplex S31803
| Property | Metric | Imperial |
|---|---|---|
| Density | 7.8 g/cmΒ³ | 0.282 lb/inΒ³ |
Melting Point of Duplex S31803
| Property | Metric | Imperial |
|---|---|---|
| Melting Point | 1430 - 1450 Β°C | 2610 - 2642 Β°F |
Specific Heat of Duplex S31803
| Specific Heat of Duplex S31803 | ||
|---|---|---|
| Specific Heat (J/kgΒ·K) | Temperature Range (Β°C) | Condition |
| 500 | 20 - 100 | Room Temperature |
| 800 | 100 - 600 | Elevated Temperature |
| 900 | 600 - 1000 | High Temperature |
Electrical Resistivity of Duplex S31803
| Electrical Resistivity | ||
|---|---|---|
| Value (¡Ω·m) | Temperature (°C) | Treatment or Condition |
| 0.73 | 20 | As fabricated |
| 0.75 | 100 | |
| 0.77 | 200 | |
| 0.80 | 300 | |
| 0.82 | 400 | |
Equivalent of Duplex S31803
| Standard | Werkstoff Nr. | UNS |
|---|---|---|
| ASTM A790 | 1.4462 | S31803 |
| ASME SA790 | 1.4462 | S31803 |
Manufacturing Process & Heat Treatment of Duplex S31803
Annealing
The annealing process for Duplex S31803 involves heating the material to a temperature of approximately 1020Β°C to 1100Β°C. This process allows for the reduction of residual stresses and enhances the ductility of the material, making it easier to work with in subsequent manufacturing processes.
Forging
Forging of Duplex S31803 is typically performed at temperatures ranging from 1100Β°C to 1200Β°C. This hot working process improves the mechanical properties of the steel by refining the grain structure and ensuring uniformity in the material, which is essential for high-performance applications.
Hardening & Tempering
| Process | Temperature Range (Β°C) | Quenching Medium | Purpose |
|---|---|---|---|
| Hardening | 1020 - 1100 | Water or Oil | To increase hardness and strength |
| Tempering | 600 - 800 | Air | To reduce brittleness and improve toughness |
| Stress Relieving | 550 - 700 | Air | To alleviate internal stresses |
The manufacturing and heat treatment processes for Duplex S31803 are critical in achieving the desired mechanical properties and performance characteristics required for various industrial applications. Proper control of these processes ensures high-quality products suitable for global steel exports.
Various Types
Duplex S31803 Spool - Type A
- Diameter: 100 mm, Length: 500 mm
- Condition: Hot Rolled
- Applications: Oil & Gas, Chemical Processing
Duplex S31803 Spool - Type B
- Diameter: 150 mm, Length: 600 mm
- Condition: Cold Drawn
- Applications: Marine, Power Generation
Duplex S31803 Spool - Type C
- Diameter: 200 mm, Length: 800 mm
- Condition: Solution Annealed
- Applications: Pulp & Paper, Wastewater Treatment
Duplex S31803 Spool - Type D
- Diameter: 250 mm, Length: 700 mm
- Condition: Pickled and Passivated
- Applications: Pharmaceutical, Food Processing
Applications & Uses of Stainless Steel and Alloy Products
- 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 | 3 mm | $4.50 β $5.00 | βΉ370 β βΉ410 |
| Duplex S31803 | 6 mm | $4.80 β $5.30 | βΉ400 β βΉ430 |
| Duplex S31803 | 10 mm | $5.00 β $5.50 | βΉ410 β βΉ450 |
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 for Metal Products
- Minimum Order Quantity (MOQ): Typically 25β100 Kg, depending on product type, dimensions, and material grade.
- Payment Terms: Flexible terms based on order volume, grade selection, and delivery location. Advance payment or mutually agreed commercial terms apply.
Steel Export Packaging & International Shipping Services from India
We provide professional steel export packaging and global shipping services from India, ensuring stainless steel and alloy steel products are securely packed, documented, and delivered to international ports including the Middle East, Europe, Africa, and Southeast Asia with full compliance to international trade and quality standards.
- Seaworthy Export Packing: Fumigated wooden crates with waterproof lining to protect steel products during ocean transit.
- Palletised & Marked Shipments: Heat number identification, batch labeling, and export documentation for traceability and customs clearance.
- Container Stuffing & Inspection: Supervised loading with photographs, weight checks, and final quality inspection before dispatch.
We Export Stainless Steel & Alloy Products 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 & Export Compliance Standards
We are a certified stainless steel and alloy steel manufacturer and global exporter from India, operating under internationally recognized quality, safety, and export compliance standards to ensure reliable supply for international buyers and industrial projects.
GST Registered Company β Government of India
ISO 9001:2015 β Quality Management System
ISO 1002:2018 - Quality Management System
Udyam Registration β MSME, Government of India
Testing Process & Quality Assurance β 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
- β EN 10204 3.1 / 3.2 Mill Test Certificates (MTC)
- β Batch-wise quality traceability and inspection records
- β Third-party inspection by SGS, TUV, Bureau Veritas & Lloydβs
- β 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 S31803 Pipe Supplier in Spain
- Duplex Stainless Steel S31803 Fittings Exporter
- Duplex S31803 Flanges Manufacturer in Spain
- Duplex Steel S31803 Bar Stockist
- Duplex S31803 Plate Distributor in Spain
Frequently Asked Questions
About Ragnar Metals & Tubes
- β Leading manufacturer, stockist, and exporter of stainless steel and alloy steel products for industrial and infrastructure projects
- β ISO 9001:2015 certified quality management system ensuring consistent product reliability and compliance
- β Specialized in precision pipes, tubes, fittings, flanges, sheets, plates, fasteners, and round bars
- β Modern processing and testing facilities with advanced manufacturing and inspection equipment
- β Custom-engineered solutions based on client drawings and technical specifications
- β Full material traceability with EN 10204 3.1 / 3.2 mill test certification
- β Compliance with ASTM, ASME, DIN, EN, and ISO international standards
- β Trusted global supplier supporting oil & gas, petrochemical, power, marine, and heavy engineering industries