Duplex 2101 Flanges
Duplex 2101 Flanges are precision-engineered components crafted from Duplex 2101 stainless steel, a lean duplex alloy known for its excellent strength and corrosion resistance. These flanges serve as critical connectors in piping systems, ensuring secure and leak-proof joints across various industrial sectors. Manufactured to comply with stringent international standards, they are designed to withstand high pressure and harsh environmental conditions.
Constructed from a balanced microstructure of austenite and ferrite, these flanges offer superior mechanical properties, including enhanced toughness and resistance to chloride-induced stress corrosion cracking. Their chemical composition typically includes moderate amounts of chromium, nickel, and molybdenum, providing an optimal combination of durability and cost-effectiveness. This makes them suitable for applications where moderate corrosion resistance and high strength are required.
Commonly utilized in oil and gas, chemical processing, desalination plants, and marine environments, these flanges are ideal for piping systems transporting aggressive fluids and gases. Their robustness ensures long service life in both onshore and offshore installations. Various types such as weld neck, slip-on, and blind flanges are available to meet specific design and operational requirements.
Manufacturers ensure that these products undergo rigorous quality control and testing, including dimensional inspection and non-destructive testing, to guarantee compliance with global standards like ASME, ASTM, and EN. Their export readiness is supported by comprehensive documentation, including mill test certificates and traceability reports, facilitating smooth international trade and installation processes.
For industrial buyers seeking reliable and versatile flange solutions, these components offer an excellent balance of performance and affordability. Their adaptability to diverse industrial environments, combined with adherence to international quality norms, makes them a preferred choice for global projects demanding both integrity and longevity in piping infrastructure.
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: 550 MT / Month
- Export Experience: 10+ Years
- Countries Served: 50+
- Annual Export Volume: 5,530 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, providing durability
- ✔ Superior weldability, allowing for easy installation
- ✔ Good resistance to stress corrosion cracking
- ✔ Cost-effective alternative to higher alloyed stainless steels
- ✔ Suitable for both high and low-temperature applications
Technical Overview of Duplex 2101 Flanges
| Product | Composition | Usage | Standards |
|---|---|---|---|
| Duplex 2101 Flanges | 22% Chromium, 5.5% Nickel, 3.5% Molybdenum, Balance Iron | Used in applications requiring high strength and corrosion resistance, such as in chemical processing and oil & gas industries. | ASTM A240, ASTM A182, ASME B16.5 |
| Duplex 2101 Flanges | 22% Chromium, 5.5% Nickel, 3.5% Molybdenum, Balance Iron | Ideal for environments with chloride exposure, offering enhanced pitting resistance. | EN 10088-1, ISO 15156 |
| Duplex 2101 Flanges | 22% Chromium, 5.5% Nickel, 3.5% Molybdenum, Balance Iron | Recommended for high-pressure applications and systems where weight reduction is critical. | API 6A, NACE MR0175 |
Specifications Table
| Material | Duplex 2101 |
|---|---|
| Grades | UNS S32101 |
| Standard | ASTM A240/A240M |
| Size Range | 1/2" to 24" |
| Length | Custom lengths available |
| Form | Flanges |
Available Grades Table
| Product | Composition | Applications |
|---|---|---|
| Duplex 2101 Flanges | Fe, 21% Cr, 0.2% Ni, 0.5% Mo, 6% Mn | Oil and gas, marine applications, chemical processing |
| Duplex 2205 Flanges | Fe, 22% Cr, 5% Ni, 3% Mo | Seawater applications, pressure vessels, heat exchangers |
| Duplex 2507 Flanges | Fe, 25% Cr, 7% Ni, 4% Mo | High chloride environments, petrochemical industries |
| Duplex 2304 Flanges | Fe, 23% Cr, 4% Ni | General purpose, storage tanks, construction |
| Duplex 2101L Flanges | Fe, 21% Cr, 0.2% Ni, 0.5% Mo, 6% Mn, low carbon | Applications requiring lower carbon content |
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 (%) |
|---|---|
| Chromium (Cr) | 19.0 - 21.0 |
| Nickel (Ni) | 0.0 - 1.0 |
| 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 - 0.02 |
Mechanical Properties of Duplex 2101 Flanges
| Property | Value |
|---|---|
| Tensile Strength | 600 MPa (min) |
| Yield Strength | 350 MPa (min) |
| Elongation | 25% (min) |
| Hardness | 230 HB (max) |
| Impact Toughness | 40 J at -20°C |
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 | 1400 - 1450 °C | 2552 - 2642 °F |
Specific Heat of Duplex 2101 Flanges
| Specific Heat of Duplex 2101 Flanges | ||
|---|---|---|
| Specific Heat (J/kg·K) | Temperature Range (°C) | Condition |
| 500 | 20 - 200 | Room Temperature |
| 600 | 200 - 600 | High Temperature |
| 700 | 600 - 1000 | Very High Temperature |
Electrical Resistivity of Duplex 2101 Flanges
| Electrical Resistivity | ||
|---|---|---|
| Value (µΩ·m) | Temperature (°C) | Treatment or Condition |
| 0.75 | 20 | As Received |
| 0.77 | 100 | |
| 0.80 | 200 | |
| 0.85 | 300 | |
| 0.90 | 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 involves heating the material to a temperature of approximately 950°C followed by a controlled cooling process. This treatment helps to relieve internal stresses and improve ductility, ensuring optimal performance in various applications.
Forging
The forging process for Duplex 2101 flanges is conducted at temperatures ranging from 1100°C to 1200°C. This hot working method enhances the mechanical properties by refining the grain structure, resulting in improved strength and toughness of the final product.
Hardening & Tempering
| Process | Temperature Range (°C) | Quenching Medium | Purpose |
|---|---|---|---|
| Hardening | 1020 - 1080 | Oil | Increase hardness and strength |
| Tempering | 400 - 600 | Air | Reduce brittleness and improve toughness |
| Stress Relieving | 600 - 700 | Air | Minimize residual stresses after machining |
The combination of these processes ensures that Duplex 2101 flanges exhibit excellent corrosion resistance, high strength, and durability, making them suitable for various demanding applications in the industrial sector.
Various Types
Duplex 2101 Blind Flange
- Diameter: 2" to 36"
- Condition: Hot Finished, Cold Drawn
- Applications: Oil and Gas, Chemical Processing
Duplex 2101 Weld Neck Flange
- Diameter: 1" to 30"
- Condition: Normalized, Annealed
- Applications: Water Treatment, Marine Applications
Duplex 2101 Socket Weld Flange
- Diameter: 1/2" to 12"
- Condition: As Rolled, Heat Treated
- Applications: Piping Systems, High Pressure Applications
Duplex 2101 Slip-On Flange
- Diameter: 1" to 24"
- Condition: Pickled, Passivated
- Applications: HVAC Systems, General Industry
Applications & Uses
- Oil & Gas Industry
- Petrochemical Plants
- Water Treatment Plants
- Pharmaceutical Industry
- Food & Beverage Industry
- Automobile Industry
Industries We Serve
Our alloys are widely used across:
- Steel Plants
- Foundries & Casting Units
- Automobile Industry
- Shipbuilding & Marine
- Oil & Gas
- Engineering Components
- Heavy Industrial Machinery
Latest Price List of Duplex 2101 Flanges
| Material Grade | Thickness | Price (USD / Kg) | Price (INR / Kg) |
|---|---|---|---|
| Duplex 2101 | 3 mm | $2.50 – $3.00 | ₹205 – ₹246 |
| Duplex 2101 | 6 mm | $2.60 – $3.10 | ₹213 – ₹254 |
| Duplex 2101 | 10 mm | $2.70 – $3.20 | ₹221 – ₹262 |
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
Cities We Suppllied In India
We exported to 50+ countries worldwide.
Our Certifications
We are a certified manufacturer and exporter, committed to strict quality control and international compliance standards. Below are our key certifications.
GST Certificate
ISO 9001:2015
ISO 1002:2018
Udyam MSME Registration
Quality Inspection & Testing
At Ragnar Metals and Tubes, all products are checked through strict quality inspection and testing to meet international standards such as ASTM, ASME, EN, and DIN. This ensures consistent quality, accurate dimensions, and full material traceability.
- ✔ Chemical composition testing
- ✔ Mechanical tests such as tensile and hardness
- ✔ Dimensional inspection as per standard tolerances
- ✔ PMI, ultrasonic, and visual inspection (if required)
- ✔ EN 10204 3.1 / 3.2 test certificates
- ✔ Third-party inspection by SGS, TUV, BV, or Lloyd’s
Our quality systems support reliable supply for oil & gas, petrochemical, power, marine, and heavy engineering projects.
Our Products Types
People Also Search For
- Duplex 2205 Flanges
- Stainless Steel Flanges
- Super Duplex Flanges
- Flange Specifications
- Duplex Stainless Steel Properties
Frequently Asked Questions
About Ragnar Metals and Tubes
- ✔ Decades of experience in stainless steel, carbon steel, and alloy steel manufacturing
- ✔ ISO 9001:2015 certified company ensuring strict quality control standards
- ✔ Specialized in cold drawn pipes and tubes processing
- ✔ State-of-the-art manufacturing facilities with modern machinery
- ✔ Precision-engineered products with consistent quality and reliability
- ✔ Customized steel solutions as per client drawings and specifications
- ✔ Compliance with international industry standards
- ✔ Trusted supplier for critical industrial applications worldwide