Duplex S31803 Spool exporter in Bahrain
Duplex S31803 Spool exporter in Bahrain specializes in delivering high-quality duplex stainless steel spools tailored for demanding industrial applications. This material, known for its excellent corrosion resistance and high strength, is widely used in sectors such as oil and gas, petrochemicals, and marine engineering. The S31803 grade combines a dual-phase microstructure of austenitic and ferritic stainless steel, offering enhanced mechanical properties and durability under harsh conditions.
The spools manufactured from Duplex S31803 are precision-engineered to meet stringent industry standards, including ASTM A789 and A182. These spools are designed for seamless integration into piping systems, ensuring leak-proof and robust performance. Their fabrication involves advanced welding and forming techniques, which maintain the integrity of the duplex microstructure, thereby maximizing resistance to stress corrosion cracking and pitting.
Ideal for applications involving aggressive environments, these stainless steel spools handle chloride-rich conditions and elevated temperatures effectively. Industries relying on reliable fluid transfer and structural stability benefit from the duplex alloy’s superior toughness and fatigue resistance. This makes them suitable for offshore platforms, refineries, and chemical processing plants where operational reliability is critical.
Export readiness is a key focus, with suppliers in Bahrain ensuring that all duplex steel spools undergo rigorous quality inspections and certification processes. Packaging is optimized for international shipping, protecting the products from mechanical damage and environmental exposure during transit. Compliance with global trade regulations and export documentation is meticulously managed to facilitate smooth delivery to clients worldwide.
For industrial buyers seeking durable and corrosion-resistant piping components, these duplex stainless steel spools represent a strategic investment. Their blend of mechanical strength, longevity, and export-ready logistics positions them as a preferred choice in the competitive stainless steel market, particularly for projects demanding high-performance materials in challenging environments.
Lead Time
2–7 weeks depending on size
Delivery Terms
FOB, CIF, DDP
Shipping Modes
Sea / Air / Express
Why Duplex S31803 Spool exporter in Bahrain 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 Bahrain
- 2. How to Choose the Right Manufacturer
- 3.Comparison of Duplex S31803 Spool exporter in Bahrain
- 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 Bahrain
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 Bahrain
| 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
- ✔ High strength and durability
- ✔ Good weldability and formability
- ✔ Resistance to pitting and crevice corrosion
- ✔ Suitable for high-pressure applications
- ✔ Cost-effective solution for various industries
Technical Overview of Duplex S31803
| Product | Composition | Usage | Standards |
|---|---|---|---|
| Duplex S31803 Spool | 22% Chromium, 5% Nickel, 3% Molybdenum, 0.17% Nitrogen | Used in oil and gas, chemical processing, and marine environments | ASTM A790, ASME SA790 |
| Duplex S31803 Flange | 22% Chromium, 5% Nickel, 3% Molybdenum, 0.17% Nitrogen | Suitable for high-pressure applications and corrosive environments | ASTM A182, ASME SA182 |
| Duplex S31803 Pipe | 22% Chromium, 5% Nickel, 3% Molybdenum, 0.17% Nitrogen | Ideal for transporting fluids in harsh conditions | ASTM A789, ASME SA789 |
Specifications Table
| Material | Duplex S31803 |
|---|---|
| Grades | S31803 |
| Standard | ASTM A790 / ASME SA790 |
| Size Range | 1/2" to 24" (NPS) |
| Length | Up to 12 meters (39.37 feet) |
| Form | Spool |
Available Grades Table
| Product | Composition | Applications |
|---|---|---|
| Duplex S31803 Pipe | Fe, 22% Cr, 5.6% Ni, 3.2% Mo | Oil and Gas, Chemical Processing |
| Duplex S31803 Plate | Fe, 22% Cr, 5.6% Ni, 3.2% Mo | Marine Applications, Pressure Vessels |
| Duplex S31803 Fittings | Fe, 22% Cr, 5.6% Ni, 3.2% Mo | Piping Systems, Structural Applications |
| Duplex S31803 Flanges | Fe, 22% Cr, 5.6% Ni, 3.2% Mo | Oil Refineries, Power Plants |
| Duplex S31803 Bar | Fe, 22% Cr, 5.6% Ni, 3.2% Mo | Construction, Fabrication |
Available Sizes of Duplex S31803 (MM)
| Size (MM) | Size (MM) |
|---|---|
| 25 | 50 |
| 32 | 60 |
| 40 | 80 |
| 50 | 100 |
| 63 | 120 |
| 80 | 150 |
| 100 | 200 |
| 125 | 250 |
| 150 | 300 |
| 200 | 350 |
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 |
| Tungsten (W) | 0.0 - 1.0 |
| Manganese (Mn) | 0.0 - 2.0 |
| Silicon (Si) | 0.0 - 1.0 |
| Carbon (C) | 0.0 - 0.03 |
| Iron (Fe) | Balance |
Mechanical Properties of Duplex S31803
| Property | Value |
|---|---|
| Tensile Strength (MPa) | 620 |
| Yield Strength (MPa) | 450 |
| Elongation (%) | 25 |
| Hardness (HB) | 250 |
| Impact Energy (J at -40°C) | 100 |
Duplex S31803 – Physical & Thermal Properties
Density of Duplex S31803
| Property | Metric | Imperial |
|---|---|---|
| Density | 7.8 g/cm³ | 0.281 lb/in³ |
Melting Point of Duplex S31803
| Property | Metric | Imperial |
|---|---|---|
| Melting Point | 1425 - 1450 °C | 2600 - 2642 °F |
Specific Heat of Duplex S31803
| Specific Heat of Duplex S31803 | ||
|---|---|---|
| Specific Heat (J/kg·K) | Temperature Range (°C) | Condition |
| 500 | 20 - 100 | Annealed |
| 480 | 100 - 300 | Annealed |
| 460 | 300 - 600 | Annealed |
Electrical Resistivity of Duplex S31803
| Electrical Resistivity | ||
|---|---|---|
| Value (µΩ·m) | Temperature (°C) | Treatment or Condition |
| 0.75 | 20 | As-rolled |
| 0.78 | 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 | X2CrNiMoN22-5-3 | 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 controlled cooling. This process is crucial for relieving internal stresses, enhancing ductility, and refining the microstructure, which ultimately improves the material's mechanical properties and corrosion resistance.
Forging
The forging of Duplex S31803 is typically performed at temperatures between 1100°C and 1200°C. This hot working process helps to improve the grain structure and mechanical properties of the steel, ensuring improved strength and toughness. The forged components are then subjected to processes that enhance their final characteristics.
Hardening & Tempering
| Process | Temperature Range (°C) | Quenching Medium | Purpose |
|---|---|---|---|
| Hardening | 1000 - 1100 | Water | To increase hardness and strength |
| Tempering | 600 - 800 | Air | To reduce brittleness and improve toughness |
| Final Heat Treatment | 850 - 900 | Oil | To stabilize the microstructure |
The manufacturing and heat treatment processes of Duplex S31803 are designed to optimize its mechanical properties and corrosion resistance, making it suitable for various industrial applications, particularly in aggressive environments.
Various Types
Duplex S31803 Spool - 1
- Dimensions: 2" to 12" NPS
- Condition: Hot Finished / Cold Drawn
- Applications: Oil & Gas, Chemical Processing
Duplex S31803 Spool - 2
- Dimensions: 3" to 10" NPS
- Condition: Annealed
- Applications: Marine Applications, Pulp and Paper
Duplex S31803 Spool - 3
- Dimensions: 4" to 16" NPS
- Condition: Pickled and Passivated
- Applications: Heat Exchangers, Pressure Vessels
Duplex S31803 Spool - 4
- Dimensions: 1" to 14" NPS
- Condition: Machined
- Applications: Power Generation, Water Treatment
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 | $3.80 – $4.30 | ₹310 – ₹350 |
| Duplex S31803 | 10 mm | $4.00 – $4.50 | ₹330 – ₹370 |
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