Duplex Sheet exporter manufacturer
Duplex Sheet exporter manufacturer specializes in providing high-quality duplex boards known for their superior strength and smooth surface finish. These sheets are typically composed of two layers of paperboard, combining a coated outer layer with an uncoated inner layer to deliver enhanced durability and printability. Ideal for packaging and printing industries, these materials meet stringent industrial standards, ensuring consistent performance across various applications.
The duplex boards offered are available in multiple thicknesses and grammages, catering to diverse requirements from lightweight cartons to heavy-duty packaging solutions. Their excellent stiffness and moisture resistance make them suitable for producing retail packaging, food containers, and other industrial-grade products. Additionally, the surface texture allows for vibrant printing, making them a preferred choice for branding and product presentation.
With a focus on export readiness, the manufacturer ensures that all sheets comply with international quality certifications and packaging norms. The products are carefully inspected and packed to withstand long-distance shipping, preserving their integrity upon arrival. This commitment to quality control and logistics efficiency supports seamless global distribution, meeting the demands of industrial buyers worldwide.
Applications of these duplex boards extend across multiple sectors, including pharmaceuticals, FMCG, and electronics, where protective yet lightweight packaging is crucial. Their versatility also makes them suitable for customized solutions, such as die-cut boxes and laminated sheets, enhancing product protection and aesthetic appeal. Buyers can rely on consistent dimensions and surface quality to achieve optimal results in automated packaging lines.
Industrial clients seeking reliable suppliers will find this manufacturer equipped with advanced production capabilities and a robust supply chain. By maintaining strict adherence to raw material sourcing and manufacturing protocols, the exporter ensures that every batch meets the highest standards. This dedication to excellence positions them as a trusted partner for bulk orders and long-term collaborations in the global market.
Lead Time
2–7 weeks depending on size
Delivery Terms
FOB, CIF, DDP
Shipping Modes
Sea / Air / Express
Why Duplex Sheet exporter manufacturer 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 Sheet exporter manufacturer
- 2. How to Choose the Right Manufacturer
- 3.Comparison of Duplex Sheet exporter manufacturer
- 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 Sheet exporter manufacturer
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 Sheet exporter manufacturer
| 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 Sheets
- ✔ Excellent corrosion resistance, making them ideal for harsh environments.
- ✔ High strength-to-weight ratio, offering durability without excessive weight.
- ✔ Superior weldability, ensuring ease of fabrication and integration into various applications.
- ✔ Enhanced toughness, maintaining integrity even at low temperatures.
- ✔ Cost-effective solution, combining the benefits of both austenitic and ferritic stainless steels.
- ✔ Wide range of applications, including chemical processing, oil and gas, and marine industries.
Technical Overview of Duplex Steel Sheets
| Product | Composition | Usage | Standards |
|---|---|---|---|
| Duplex 2205 | 22% Cr, 5% Ni, 3% Mo | Oil and gas, chemical processing, marine applications | ASTM A240, ASME SA240 |
| Duplex 2507 | 25% Cr, 7% Ni, 4% Mo | Desalination plants, pulp and paper, offshore environments | ASTM A240, ASME SA240 |
| Duplex 31803 | 22% Cr, 5% Ni, 3% Mo | Structural applications, storage tanks, pressure vessels | ASTM A240, ASME SA240 |
Specifications Table
| Material | Duplex Stainless Steel |
|---|---|
| Grades | UNS S31803, UNS S32205 |
| Standard | AISI, ASTM A240, ASME SA240 |
| Size Range | 0.5 mm to 100 mm thickness |
| Length | Up to 6000 mm |
| Form | Sheet, Plate |
Available Grades Table
| Product | Composition | Applications |
|---|---|---|
| Duplex 2205 | Fe, 22% Cr, 3% Mo, 5% Ni | Oil and gas, chemical processing, marine applications |
| Duplex 2507 | Fe, 25% Cr, 7% Ni, 4% Mo | Seawater applications, pulp and paper, petrochemical |
| Duplex 2101 | Fe, 21% Cr, 1.5% Ni, 3.5% Mo | Food processing, storage tanks, structural components |
| Duplex 3296 | Fe, 32% Cr, 6% Ni, 7% Mo | Acid production, chemical tankers, oil and gas |
| Duplex S31803 | Fe, 22% Cr, 5% Ni, 3% Mo | Heat exchangers, pressure vessels, offshore platforms |
Available Sizes of Duplex Sheet (MM)
| Size (MM) | Size (MM) |
|---|---|
| 1000 | 2000 |
| 1200 | 2400 |
| 1500 | 3000 |
| 2000 | 4000 |
| 2500 | 5000 |
| 3000 | 6000 |
| 4000 | 8000 |
| 5000 | 10000 |
| 6000 | 12000 |
| 8000 | 15000 |
Chemical Properties of Duplex Stainless Steel
| Element | Composition (%) |
|---|---|
| Iron (Fe) | 60.0 - 70.0 |
| Chromium (Cr) | 18.0 - 28.0 |
| Nickel (Ni) | 4.5 - 8.0 |
| Molybdenum (Mo) | 2.5 - 5.0 |
| Manganese (Mn) | 0.5 - 2.0 |
| Silicon (Si) | 0.5 - 1.0 |
| Carbon (C) | 0.03 max |
| Phosphorus (P) | 0.03 max |
Mechanical Properties of Duplex Stainless Steel Sheet
| Property | Value |
|---|---|
| Tensile Strength (MPa) | 620 - 800 |
| Yield Strength (MPa) | 450 - 600 |
| Elongation (%) | 25 - 40 |
| Hardness (HB) | 200 - 300 |
| Impact Strength (J at -40°C) | ≥ 40 |
Duplex Steel – Physical & Thermal Properties
Density of Duplex Steel
| Property | Metric | Imperial |
|---|---|---|
| Density | 7.8 g/cm³ | 0.282 lb/in³ |
Melting Point of Duplex Steel
| Property | Metric | Imperial |
|---|---|---|
| Melting Point | 1400 - 1450 °C | 2552 - 2642 °F |
Specific Heat of Duplex Steel
| Specific Heat of Duplex Steel | ||
|---|---|---|
| Specific Heat (J/kg·K) | Temperature Range (°C) | Condition |
| 500 | 20 - 100 | Room Temperature |
| 600 | 100 - 600 | High Temperature |
| 700 | 600 - 1000 | Very High Temperature |
Electrical Resistivity of Duplex Stainless Steel
| Electrical Resistivity | ||
|---|---|---|
| Value (µΩ·m) | Temperature (°C) | Treatment or Condition |
| 0.72 | 20 | As-rolled |
| 0.75 | 100 | |
| 0.78 | 200 | |
| 0.80 | 300 | |
| 0.82 | 400 | |
Equivalent of Duplex Stainless Steel
| Standard | Werkstoff Nr. | UNS |
|---|---|---|
| ASTM A240 | 1.4462 | S32205 |
| EN 10088-3 | X2CrNiMoN22-5-3 | S31803 |
Manufacturing Process & Heat Treatment of Duplex Stainless Steel Sheets
Annealing
Annealing of duplex stainless steel sheets is performed to relieve internal stresses and improve ductility. The process typically involves heating the steel to a temperature range of 1020 to 1100 °C, followed by controlled cooling. This treatment enhances the material's corrosion resistance and mechanical properties, making it suitable for various industrial applications.
Forging
Forging of duplex stainless steel sheets is conducted to shape the material while enhancing its mechanical properties through deformation. This process involves heating the steel to a temperature between 1100 and 1300 °C and then applying compressive forces. The result is a refined grain structure that increases strength and toughness, essential for demanding applications in industries such as oil and gas.
Hardening & Tempering
| Process | Temperature Range (°C) | Quenching Medium | Purpose |
|---|---|---|---|
| Hardening | 1000 - 1100 | Water or Oil | Increase hardness and strength |
| Tempering | 300 - 600 | Air | Reduce brittleness and improve ductility |
| Stress Relieving | 600 - 800 | Air | Eliminate residual stresses |
The manufacturing and heat treatment processes for duplex stainless steel sheets are critical in achieving the desired mechanical properties and corrosion resistance, ensuring the material performs effectively in various applications.
Various Types
Duplex Stainless Steel Sheet 2205
- Thickness: 0.5mm - 50mm
- Condition: Hot Rolled, Cold Rolled
- Applications: Chemical Processing, Oil and Gas, Marine Industry
Duplex Stainless Steel Sheet 2507
- Thickness: 0.5mm - 20mm
- Condition: Annealed, Pickled
- Applications: Desalination Plants, Pulp and Paper Industry
Duplex Stainless Steel Sheet 2304
- Thickness: 0.5mm - 25mm
- Condition: Cold Rolled, Hot Rolled
- Applications: Food Processing, Wastewater Treatment
Duplex Stainless Steel Sheet 2207
- Thickness: 0.5mm - 15mm
- Condition: Hot Rolled, Annealed
- Applications: Chemical Storage Tanks, 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 Sheets
| Material Grade | Thickness | Price (USD / Kg) | Price (INR / Kg) |
|---|---|---|---|
| Duplex 2205 | 3 mm | $2.50 – $3.00 | ₹210 – ₹250 |
| Duplex 2205 | 6 mm | $2.40 – $2.90 | ₹200 – ₹240 |
| Duplex 2205 | 10 mm | $2.30 – $2.80 | ₹190 – ₹230 |
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 Sheets.
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.
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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