Duplex Sheet exporter
Duplex Sheet exporter companies specialize in supplying high-quality duplex boards, a type of paperboard known for its dual-layer construction that combines a white, printable surface with a grey backing. These sheets are typically made from recycled pulp and virgin fibers, offering excellent strength, smoothness, and stiffness. The material is widely used in packaging industries due to its durability and cost-effectiveness, making it ideal for various applications ranging from food packaging to consumer goods boxes.
Manufactured with precise thicknesses and grammages, these sheets provide consistent performance for printing and die-cutting processes. Common specifications include thickness variations from 0.25 mm up to 0.8 mm, with grammage typically ranging between 200 to 400 gsm. The dual-coated surface ensures superior print quality, making it suitable for high-end graphic designs and branding requirements. Additionally, the backing layer offers structural support, preventing warping and enhancing product protection during transit.
In industrial applications, this board is favored for packaging lightweight products, including pharmaceuticals, cosmetics, and food items such as tea and biscuits. Its moisture resistance and rigidity contribute to maintaining product integrity and shelf appeal. Due to its recyclable nature, it also aligns with sustainable packaging initiatives, making it an attractive choice for environmentally conscious manufacturers and retailers.
Exporters focusing on international markets ensure that the duplex sheets comply with relevant quality standards and certifications, such as ISO and FSC, to meet global buyer expectations. Packaging and shipping processes are optimized to prevent damage during long-haul transport, with customized palletization and moisture-proof wrapping commonly employed. This readiness for export helps streamline supply chains and supports timely delivery to diverse industrial buyers around the world.
By partnering with experienced suppliers, businesses can access a reliable source of duplex board tailored to specific industry needs, ensuring consistent quality and competitive pricing. Whether used for retail packaging or industrial applications, these sheets offer a versatile and efficient material solution that supports branding, protection, and sustainability goals in global markets.
Lead Time
2–7 weeks depending on size
Delivery Terms
FOB, CIF, DDP
Shipping Modes
Sea / Air / Express
Why Duplex Sheet exporter 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
- 2. How to Choose the Right Manufacturer
- 3.Comparison of Duplex Sheet exporter
- 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
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
| 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 in harsh environments
- ✔ High strength-to-weight ratio for various applications
- ✔ Superior weldability and fabrication properties
- ✔ Increased durability compared to standard stainless steels
- ✔ Cost-effective due to lower maintenance needs
- ✔ Versatile applications in oil and gas, chemical processing, and marine industries
Technical Overview of Duplex Stainless Steel Sheets
| Product | Composition | Usage | Standards |
|---|---|---|---|
| Duplex 2205 | 22% Cr, 3% Mo, 5% Ni | Oil and gas, chemical processing, marine applications | ASTM A240, EN 10088-3 |
| Duplex 2507 | 25% Cr, 7% Ni, 4% Mo | Seawater applications, heat exchangers, pressure vessels | ASTM A240, EN 10088-3 |
| Duplex 32750 | 25% Cr, 6% Ni, 0.5% N | Desalination plants, oil platforms, petrochemical industries | ASTM A240, EN 10088-3 |
Specifications Table
| Material | Duplex Stainless Steel |
|---|---|
| Grades | S31803, S32205, S32750 |
| Standard | ASTM A240, ASME SA240 |
| Size Range | 0.5 mm to 20 mm thickness |
| Length | Up to 6000 mm |
| Form | Sheets and Plates |
Available Grades Table
| Product | Composition | Applications |
|---|---|---|
| Duplex 2205 | 22% Cr, 5% Ni, 3% Mo | Oil and gas, chemical processing |
| Duplex 2507 | 25% Cr, 7% Ni, 4% Mo | Marine environments, desalination plants |
| Duplex 2304 | 23% Cr, 4% Ni | Food processing, wastewater treatment |
| Duplex 2707 | 27% Cr, 9% Ni, 4% Mo | Severe corrosion environments, oil and gas |
| Duplex 1913L | 19% Cr, 1% Ni, 3% Mo | Pharmaceuticals, pulp and paper |
Available Sizes of Duplex Sheet (MM)
| Size (MM) | Size (MM) |
|---|---|
| 1000 | 2000 |
| 1250 | 2500 |
| 1500 | 3000 |
| 2000 | 4000 |
| 2500 | 5000 |
| 3000 | 6000 |
| 3500 | 7000 |
| 4000 | 8000 |
| 4500 | 9000 |
| 5000 | 10000 |
Chemical Properties of Duplex Stainless Steel
| Element | Composition (%) |
|---|---|
| Chromium (Cr) | 20.0 - 30.0 |
| Nickel (Ni) | 4.5 - 8.0 |
| Molybdenum (Mo) | 3.0 - 5.0 |
| Manganese (Mn) | 0.5 - 2.0 |
| Silicon (Si) | 0.5 - 1.0 |
| Carbon (C) | 0.03 max |
| Phosphorus (P) | 0.03 max |
| Sulfur (S) | 0.01 max |
Mechanical Properties of Duplex Steel Sheet
| Property | Value |
|---|---|
| Tensile Strength (MPa) | 620 - 850 |
| Yield Strength (MPa) | 450 - 700 |
| Elongation (% in 50 mm) | 25 - 40 |
| Reduction of Area (%) | 50 - 60 |
| Hardness (HB) | 250 - 330 |
Duplex Steel – Physical & Thermal Properties
Density of Duplex Steel
| Property | Metric | Imperial |
|---|---|---|
| Density | 7.8 g/cm³ | 0.283 lb/in³ |
Melting Point of Duplex Steel
| Property | Metric | Imperial |
|---|---|---|
| Melting Point | 1350 - 1450 °C | 2462 - 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 - 300 | Heating |
| 700 | 300 - 600 | High Temperature |
Electrical Resistivity of Duplex Stainless Steel
| Electrical Resistivity | ||
|---|---|---|
| Value (µΩ·m) | Temperature (°C) | Treatment or Condition |
| 0.75 | 20 | As Rolled |
| 0.78 | 100 | |
| 0.82 | 200 | |
| 0.85 | 300 | |
| 0.90 | 400 | |
Equivalent of Duplex Sheet
| Standard | Werkstoff Nr. | UNS |
|---|---|---|
| EN 1.4462 | Duplex 2205 | S32205 |
| ASTM A240 | F51 | S31803 |
Manufacturing Process & Heat Treatment of Duplex Sheets
Annealing
Annealing of duplex sheets involves heating the material to a temperature of around 1020°C to 1100°C, followed by controlled cooling. This process helps to relieve internal stresses, improve ductility, and enhance the overall microstructure of the steel.
Forging
Forging of duplex sheets is typically carried out at temperatures between 1000°C and 1200°C. This process enhances the mechanical properties of the steel by refining its grain structure, resulting in improved strength and toughness.
Hardening & Tempering
| Process | Temperature Range (°C) | Quenching Medium | Purpose |
|---|---|---|---|
| Hardening | 1000 - 1100 | Oil | To increase hardness and strength of the material. |
| Tempering | 600 - 800 | Air | To reduce brittleness and improve toughness. |
| Stress Relieving | 400 - 600 | Air | To relieve residual stresses from machining or welding. |
The combination of these manufacturing processes and heat treatments is essential for producing high-quality duplex sheets that meet the stringent requirements of various applications in industries such as oil and gas, marine, and construction.
Various Types
Duplex Stainless Steel Sheet 2205
- Thickness: 1.5mm - 20mm
- Condition: Hot Rolled, Cold Rolled
- Applications: Oil & Gas, Marine, Chemical Processing
Duplex Stainless Steel Sheet 2507
- Thickness: 0.5mm - 15mm
- Condition: Annealed, Pickled
- Applications: Desalination, Pulp and Paper, Marine Environment
Duplex Stainless Steel Sheet 32750
- Thickness: 2mm - 12mm
- Condition: Cold Rolled, Annealed
- Applications: Chemical Processing, Oil & Gas, Petrochemical
Duplex Stainless Steel Sheet 2207
- Thickness: 1mm - 10mm
- Condition: Hot Rolled, Annealed
- Applications: Wastewater Treatment, Marine Applications
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 Steel | 3 mm | $3.00 – $3.50 | ₹250 – ₹290 |
| Duplex Steel | 6 mm | $2.80 – $3.20 | ₹230 – ₹270 |
| Duplex Steel | 10 mm | $2.50 – $3.00 | ₹210 – ₹250 |
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.
People Also Search For
- Duplex Stainless Steel Suppliers
- Duplex Sheet Manufacturers
- Duplex Steel Plate Exporters
- Super Duplex Steel Sheets
- Duplex Steel Coil Suppliers
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