Duplex 2101 Flanges
Duplex 2101 Flanges are manufactured to meet stringent ASTM and ASME standards, ensuring high corrosion resistance and mechanical strength. These components are commonly fabricated using UNS S32101 grade for enhanced duplex stainless steel performance.
Widely applied in chemical processing, oil and gas, and marine industries, these flanges withstand harsh environments and elevated pressures. Their dual-phase microstructure provides superior stress corrosion cracking resistance compared to standard austenitic grades.
Quality assurance involves rigorous non-destructive testing (NDT) such as ultrasonic and dye penetrant inspections to verify integrity. Dimensional accuracy and surface finish are controlled per international specifications to guarantee compatibility and reliability.
Export procedures include customized packaging to prevent damage during transit, supported by detailed documentation for customs clearance. Efficient logistics management ensures timely delivery to global clients, maintaining supply chain continuity.
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 2101 Flanges
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 2101 Flanges
- 2. Why Choose Ragnar Pipe and Tube
- 3. Export Delivery & Lead Time Information
- 4. How to Choose the Right Manufacturer
- 5. Comparison of Duplex 2101 Flanges
- 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 2101 Flanges
Choosing the right supplier for Duplex 2101 Flanges 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 2101 Flanges
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 2101 Flanges
- β Excellent resistance to pitting and crevice corrosion
- β High strength and durability in various environments
- β Cost-effective alternative to higher alloyed stainless steels
- β Good weldability and formability for various applications
- β Suitable for a wide range of temperatures and pressures
- β Enhanced mechanical properties compared to standard austenitic grades
Technical Overview of Duplex 2101 Flanges
| Product | Composition | Usage | Standards |
|---|---|---|---|
| Duplex 2101 Pipes | Fe, Cr (18-22%), Ni (3-5%), Mo (0.5-1%), N (0.1-0.2%) | Used in chemical processing and oil & gas industries | ASTM A790, EN 10216-5, UNS S32101 |
| Duplex 2101 Tubes | Fe, Cr (18-22%), Ni (3-5%), Mo (0.5-1%), N (0.1-0.2%) | Ideal for heat exchangers and pressure vessels | ASTM A789, EN 10217-7, UNS S32101 |
| Duplex 2101 Fittings | Fe, Cr (18-22%), Ni (3-5%), Mo (0.5-1%), N (0.1-0.2%) | Applied in construction and shipbuilding industries | ASTM A815, EN 10241, UNS S32101 |
Specifications Table
| Material | Duplex Stainless Steel 2101 |
|---|---|
| Grades | UNS S32101 |
| Standard | ASTM A240 / A240M |
| Size Range | 1/2" to 24" |
| Length | Custom lengths available upon request |
| Form | Flat Flanges, Slip-On Flanges, Blind Flanges |
Available Grades Table
| Product | Composition | Applications |
|---|---|---|
| Duplex 2101 Pipes | Fe, 21% Cr, 1.5% Ni, 0.3% Mo | Oil and Gas Industry, Hydraulic Systems |
| Duplex 2101 Tubes | Fe, 21% Cr, 1.5% Ni, 0.3% Mo | Chemical Processing, Heat Exchangers |
| Duplex 2101 Fittings | Fe, 21% Cr, 1.5% Ni, 0.3% Mo | Marine Applications, Desalination Plants |
| Duplex 2101 Bars | Fe, 21% Cr, 1.5% Ni, 0.3% Mo | Structural Components, Fasteners |
| Duplex 2101 Plates | Fe, 21% Cr, 1.5% Ni, 0.3% Mo | Construction, Shipbuilding |
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 | 700 |
Chemical Properties of Duplex 2101 Flanges
| Element | Composition (%) |
|---|---|
| Iron (Fe) | 65.0 - 70.0 |
| Chromium (Cr) | 20.0 - 22.0 |
| Nickel (Ni) | 4.5 - 6.5 |
| Manganese (Mn) | 4.5 - 6.0 |
| Molybdenum (Mo) | 0.5 - 1.0 |
| Nitrogen (N) | 0.1 - 0.2 |
| Carbon (C) | 0.03 max |
| Sulfur (S) | 0.01 max |
Mechanical Properties of Duplex 2101 Flanges
| Property | Value |
|---|---|
| Tensile Strength | 600 MPa |
| Yield Strength | 450 MPa |
| Elongation | 25% |
| Hardness | 220 HB |
| Impact Toughness (Charpy V-notch) | 50 J at -40Β°C |
Duplex 2101 Flanges β Physical & Thermal Properties
Density of Duplex 2101 Flanges
| Property | Metric | Imperial |
|---|---|---|
| Density | 7.1 g/cmΒ³ | 0.256 lb/inΒ³ |
Melting Point of Duplex 2101 Flanges
| Property | Metric | Imperial |
|---|---|---|
| Melting Point | 1400 - 1450 Β°C | 2552 - 2642 Β°F |
Specific Heat of Duplex 2101 Flanges
| Specific Heat of Duplex 2101 Flanges | ||
|---|---|---|
| Specific Heat (J/kgΒ·K) | Temperature Range (Β°C) | Condition |
| 500 | 20 - 100 | Room Temperature |
| 600 | 100 - 600 | High Temperature |
| 700 | 600 - 1000 | Very High Temperature |
Electrical Resistivity of Duplex 2101 Flanges
| Electrical Resistivity | ||
|---|---|---|
| Value (¡Ω·m) | Temperature (°C) | Treatment or Condition |
| 0.75 | 20 | As-Fabricated |
| 0.77 | 100 | |
| 0.80 | 200 | |
| 0.83 | 300 | |
| 0.85 | 400 | |
Equivalent of Duplex 2101 Flanges
| Standard | Werkstoff Nr. | UNS |
|---|---|---|
| EN 1.4162 | 1.4162 | S32101 |
| AISI 2101 | 2101 | S32101 |
Manufacturing Process & Heat Treatment of Duplex 2101 Flanges
Annealing
The annealing process for Duplex 2101 flanges involves heating the material to a temperature range of 1020-1100Β°C, followed by a controlled cooling process. This treatment helps to relieve internal stresses, improve ductility, and enhance the overall mechanical properties of the steel.
Forging
Forging of Duplex 2101 flanges is conducted at temperatures between 1100Β°C and 1200Β°C. The material is shaped through mechanical deformation, which aligns the grain structure and enhances strength and toughness. The forging process is critical in achieving the desired dimensions and material properties.
Hardening & Tempering
| Process | Temperature Range (Β°C) | Quenching Medium | Purpose |
|---|---|---|---|
| Hardening | 1000-1100 | Water or Oil | To increase hardness and strength |
| Tempering | 400-600 | Air | To reduce brittleness and improve toughness |
| Stabilization | 800-900 | Air | To enhance corrosion resistance and stabilize microstructure |
The combination of these processes ensures that Duplex 2101 flanges achieve optimal mechanical properties, making them suitable for a wide range of industrial applications.
Various Types
Duplex 2101 Blind Flange
- Dimensions: 1" to 24" (ANSI B16.5)
- Condition: Hot Rolled
- Applications: Chemical processing, Oil and gas, Marine applications
Duplex 2101 Slip-On Flange
- Dimensions: 1" to 36" (ANSI B16.5)
- Condition: Cold Finished
- Applications: Piping systems, Water treatment, Power generation
Duplex 2101 Weld Neck Flange
- Dimensions: 1" to 30" (ANSI B16.5)
- Condition: Annealed
- Applications: High-pressure systems, Oil and gas, Petrochemical
Duplex 2101 Socket Weld Flange
- Dimensions: 1/2" to 4" (ANSI B16.5)
- Condition: Pickled and Passivated
- Applications: Pressure vessels, Boiler systems, Industrial piping
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 2101 Flanges
| Material Grade | Thickness | Price (USD / Kg) | Price (INR / Kg) |
|---|---|---|---|
| Duplex 2101 | 3 mm | $3.50 β $4.00 | βΉ290 β βΉ330 |
| Duplex 2101 | 6 mm | $3.70 β $4.20 | βΉ300 β βΉ340 |
| Duplex 2101 | 10 mm | $3.90 β $4.50 | βΉ310 β βΉ350 |
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 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
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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