Duplex 2101 Flanges
Duplex 2101 Flanges are precision-engineered components crafted from Duplex 2101 stainless steel, a lean duplex alloy known for its excellent corrosion resistance and high strength. These flanges serve as crucial connectors in piping systems, ensuring secure and leak-proof joints in various industrial setups. Manufactured to meet stringent international standards, they offer a balanced combination of austenitic and ferritic phases, delivering superior mechanical properties and resistance to stress corrosion cracking.
These fittings are typically produced in multiple forms, including weld neck, slip-on, blind, and threaded flanges, catering to diverse pipeline requirements. The duplex stainless steel base material provides enhanced durability, making them ideal for use in aggressive environments such as chemical processing, oil and gas, and marine applications. Their ability to withstand chloride-induced corrosion and elevated temperatures ensures long service life and reduced maintenance costs.
Specifications for these flanges often include compliance with ASTM A182 and ASME B16.5 standards, ensuring compatibility with global piping systems and pressure classes ranging from 150 to 2500. Dimensional accuracy is maintained through rigorous quality control processes, including ultrasonic testing and dimensional inspections, to guarantee performance under high-pressure conditions. The duplex grade 2101 offers a cost-effective alternative to more expensive super duplex variants without compromising on essential mechanical and corrosion-resistant qualities.
In terms of applications, these components are widely utilized in industries requiring robust and reliable flange connections, such as petrochemical refineries, desalination plants, and power generation facilities. Their dual-phase microstructure provides a significant advantage in resisting localized corrosion phenomena, making them suitable for seawater and acidic environments. This versatility supports a broad spectrum of industrial needs, from moderate to highly corrosive service conditions.
Export readiness of these flanges is ensured through adherence to international packaging and documentation standards, facilitating seamless shipment and customs clearance. Suppliers typically provide traceability certificates, mill test reports, and third-party inspection certifications to meet global procurement requirements. With a focus on quality, durability, and compliance, these stainless steel flanges are a reliable choice for industrial buyers seeking long-term performance in demanding applications.
Lead Time
2–7 weeks depending on size
Delivery Terms
FOB, CIF, DDP
Shipping Modes
Sea / Air / Express
Why Duplex 2101 Flanges 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 2101 Flanges
- 2. How to Choose the Right Manufacturer
- 3.Comparison of Duplex 2101 Flanges
- 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 2101 Flanges
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 2101 Flanges
| 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 2101 Flanges
- ✔ Excellent corrosion resistance in a variety of environments
- ✔ High strength-to-weight ratio, reducing overall material costs
- ✔ Good weldability, making installation and repairs easier
- ✔ Enhanced durability and longevity in service
- ✔ Improved stress corrosion cracking resistance
- ✔ Versatile application in various industries, including oil and gas
Technical Overview of Duplex 2101 Flanges
| Product | Composition | Usage | Standards |
|---|---|---|---|
| Duplex 2101 Flanges | 22% Chromium, 3% Nickel, 5% Molybdenum, balance Iron | Used in piping systems for oil and gas, chemical processing, and marine applications | ASTM A240, ASTM A182 |
| Duplex 2101 Flanges | Low carbon content for enhanced weldability | Suitable for high strength and corrosion resistance environments | ASME B16.5, NACE MR0175 |
| Duplex 2101 Flanges | Excellent resistance to pitting and crevice corrosion | Ideal for applications involving seawater and acidic environments | ISO 15156, EN 10088 |
Specifications Table
| Material | Duplex Stainless Steel 2101 |
|---|---|
| Grades | UNS S32101 |
| Standard | ASTM A182 / A240 |
| Size Range | 1/2" to 24" |
| Length | Customizable lengths available |
| Form | Blind, Slip-on, Weld neck, Threaded |
Available Grades Table
| Product | Composition | Applications |
|---|---|---|
| Duplex 2101 | 22% Cr, 5.5% Ni, 0.15% N | Oil and gas, chemical processing |
| Duplex 2101 Flanges | 22% Cr, 5.5% Ni, 0.15% N | Marine applications, water treatment |
| Duplex 2101 Pipe Fittings | 22% Cr, 5.5% Ni, 0.15% N | Heat exchangers, pressure vessels |
| Duplex 2101 Fasteners | 22% Cr, 5.5% Ni, 0.15% N | Construction, infrastructure projects |
| Duplex 2101 Sheet | 22% Cr, 5.5% Ni, 0.15% N | Automotive, aerospace components |
Available Sizes of Duplex 2101 Flanges (MM)
| Size (MM) | Size (MM) |
|---|---|
| 15 | 20 |
| 25 | 32 |
| 40 | 50 |
| 65 | 80 |
| 100 | 125 |
| 150 | 200 |
| 250 | 300 |
| 350 | 400 |
| 450 | 500 |
| 600 | 800 |
Chemical Properties of Duplex 2101 Flanges
| Element | Composition (%) |
|---|---|
| Chromium (Cr) | 20.0 - 24.0 |
| Nickel (Ni) | 4.5 - 8.0 |
| Molybdenum (Mo) | 0.0 - 0.5 |
| Manganese (Mn) | 5.0 - 7.0 |
| Silicon (Si) | 0.0 - 1.0 |
| Carbon (C) | 0.0 - 0.03 |
| Phosphorus (P) | 0.0 - 0.03 |
| Sulfur (S) | 0.0 - 0.01 |
Mechanical Properties of Duplex 2101 Flanges
| Property | Value |
|---|---|
| Tensile Strength (MPa) | 550 |
| Yield Strength (MPa) | 400 |
| Elongation (%) | 25 |
| Hardness (HB) | 250 |
| Impact Toughness (J) | 50 |
Duplex 2101 Flanges – Physical & Thermal Properties
Density of Duplex 2101 Flanges
| Property | Metric | Imperial |
|---|---|---|
| Density | 7.1 g/cm³ | 0.256 lb/in³ |
Melting Point of Duplex 2101 Flanges
| Property | Metric | Imperial |
|---|---|---|
| Melting Point | 1425 - 1550 °C | 2600 - 2820 °F |
Specific Heat of Duplex 2101 Flanges
| Specific Heat of Duplex 2101 Flanges | ||
|---|---|---|
| Specific Heat (J/kg·K) | Temperature Range (°C) | Condition |
| 500 | 20 - 100 | Room Temperature |
| 520 | 100 - 400 | Heat Treatment |
| 540 | 400 - 600 | High Temperature |
Electrical Resistivity of Duplex 2101 Flanges
| 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 2101 Flanges
| Standard | Werkstoff Nr. | UNS |
|---|---|---|
| EN 1.4162 | Duplex 2101 | S32101 |
| AISI 2101 | Duplex 2101 | S32101 |
Manufacturing Process & Heat Treatment of Duplex 2101 Flanges
Annealing
Annealing of Duplex 2101 flanges is performed to relieve internal stresses and improve ductility. The process involves heating the steel to a temperature range of 1020°C to 1100°C, followed by controlled cooling. This treatment enhances the mechanical properties and ensures uniformity in microstructure.
Forging
Forging of Duplex 2101 flanges is conducted at elevated temperatures, typically between 1100°C and 1200°C. This process involves shaping the material through compressive forces, which refines the grain structure and enhances strength. The forged flanges are then allowed to cool gradually to minimize distortion.
Hardening & Tempering
| Process | Temperature Range (°C) | Quenching Medium | Purpose |
|---|---|---|---|
| Hardening | 1000 - 1100 | Oil | Increase hardness and strength |
| Tempering | 600 - 800 | Air | Reduce brittleness and relieve stresses |
| Stabilization | 500 - 600 | Air | Enhance corrosion resistance |
The manufacturing and heat treatment processes for Duplex 2101 flanges are critical in achieving optimal mechanical properties and performance in demanding applications. Proper execution of these processes ensures the reliability and longevity of the final product.
Various Types
Duplex 2101 Slip-On Flanges
- Dimensions: 1" to 24" NPS
- Condition: Annealed
- Applications: Pipeline systems, Oil and gas, Water treatment
Duplex 2101 Weld Neck Flanges
- Dimensions: 1" to 30" NPS
- Condition: Hot rolled
- Applications: Chemical processing, Marine applications, Pressure vessels
Duplex 2101 Blind Flanges
- Dimensions: 1" to 36" NPS
- Condition: Cold worked
- Applications: HVAC systems, Piping systems, Pressure containment
Duplex 2101 Socket Weld Flanges
- Dimensions: 1/2" to 4" NPS
- Condition: Pickled and passivated
- Applications: High-pressure systems, Gas pipelines, Industrial processes
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 2101 Flanges
| Material Grade | Thickness | Price (USD / Kg) | Price (INR / Kg) |
|---|---|---|---|
| Duplex 2101 | 3 mm | $2.50 – $3.00 | ₹207 – ₹248 |
| Duplex 2101 | 6 mm | $2.75 – $3.25 | ₹228 – ₹270 |
| Duplex 2101 | 10 mm | $3.00 – $3.50 | ₹248 – ₹290 |
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 2101 Flanges.
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