#DuplexFasteners

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Welcome to Dalloyed – Global Leaders in Fastener Solutions

Dalloyed is a trusted name in the world of industrial fasteners, recognized as a leading manufacturer, global supplier, reliable stockist, and premier exporter based in India. With years of industry expertise and a commitment to excellence, we deliver high-quality fasteners that meet the rigorous demands of diverse industries across the globe.

We specialize in a wide range of standard and custom fasteners, including:

Bolts

Nuts

Screws

Washers

Stud Bolts

Coated Fasteners

Our extensive product portfolio ensures we can cater to your specific requirements with precision and reliability.

At Dalloyed, we manufacture fasteners using premium-grade materials to ensure strength, durability, and performance in every application. Our material range includes:

Stainless Steel (SS) Fasteners

SMO 254 Fasteners

Duplex and Super Duplex Fasteners

Monel Fasteners

Inconel Fasteners

Incoloy Fasteners

Hastelloy Fasteners

We are proud to serve clients across industries worldwide, delivering excellence from India to every corner of the globe. Whether you need bulk industrial supply or custom-engineered components, Dalloyed is your one-stop destination for reliable and high-performance fastening solutions.

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Duplex and Super Duplex Fasteners – A Complete Guide

Fasteners are essential components used in nearly every industrial sector, and the materials used to manufacture them are just as critical. Among the various high-performance alloys available, Duplex and Super Duplex stainless steels have gained significant prominence. These fasteners are known for their exceptional strength, corrosion resistance, and reliability in the most demanding environments.

In this blog, we will explore everything you need to know about Duplex and Super Duplex Fasteners, including their composition, types, applications, advantages, and why Ananka Fasteners is a trusted manufacturer and supplier of these high-grade components.

What Are Duplex and Super Duplex Fasteners?

Duplex fasteners are manufactured using duplex stainless steel, which features a dual-phase microstructure composed of roughly equal parts austenite and ferrite—typically around 50% of each.. This unique structure gives them a combination of high strength and excellent resistance to stress corrosion cracking.

Super Duplex fasteners, on the other hand, are a more advanced version of duplex fasteners. They possess elevated levels of chromium, molybdenum, and nitrogen, which provide enhanced corrosion resistance, especially in chloride-rich and marine environments.

Chemical Composition

Duplex Stainless Steel (e.g., UNS S31803 / S32205)

Chromium: 21–23%

Nickel: 4.5–6.5%

Molybdenum: 2.5–3.5%

Nitrogen: 0.14–0.20%

Iron: Balance

Super Duplex Stainless Steel (e.g., UNS S32750 / S32760)

Chromium: 24–26%

Nickel: 6–8%

Molybdenum: 3–5%

Nitrogen: 0.24–0.35%

Tungsten (optional): Up to 0.5%

Iron: Balance

Mechanical Properties

Types of Duplex and Super Duplex Fasteners

These fasteners are available in various types to suit different applications:

Hex Bolts

Hex Nuts

Stud Bolts

Washers

Socket Head Cap Screws

Machine Screws

Threaded Rods

Anchor Bolts

U-Bolts

Eye Bolts

All types are available in both DIN, ASTM, ISO, and BS standards.

Applications of Duplex and Super Duplex Fasteners

These fasteners are ideal for use in:

Marine and Offshore Industries

Chemical Processing

Oil and Gas Equipment

Desalination Plants

Power Generation

Pulp and Paper Industry

Heat Exchangers and Pressure Vessels

Subsea Applications

Their ability to withstand extreme temperatures, high pressures, and corrosive chemicals makes them the preferred choice for harsh environments.

Advantages of Duplex and Super Duplex Fasteners

Exceptional Corrosion ResistanceProvides strong resistance against pitting, crevice corrosion, and stress corrosion cracking, even when exposed to saltwater and acidic environments.

High Strength-to-Weight RatioOffers superior mechanical properties compared to austenitic stainless steels like 304 and 316.

Cost-EffectiveDue to their high strength, smaller diameters and thinner sections may be used compared to other materials, resulting in material savings.

Longevity and ReliabilityLow maintenance and long service life in demanding applications.

Temperature ResistanceSuitable for both high-temperature and cryogenic applications.

Duplex vs. Super Duplex Fasteners – A Comparison

Why Choose Ananka Fasteners?

Ananka Fasteners is a leading manufacturer, supplier, and exporter of high-performance Duplex and Super Duplex Fasteners. Here's why we are trusted globally:

Wide Product Range: Full range of fasteners in all sizes and standards.

Top-Quality Raw Material: Sourced from certified vendors.

Customization: Tailored fasteners based on client drawings and specifications.

Stringent Quality Control: In-house testing and third-party inspections.

Global Export Network: Supplying to over 30 countries including the USA, UK, UAE, Australia, Singapore, and more.

Prompt Delivery: Efficient logistics for on-time global shipments.

Conclusion

Duplex and Super Duplex Fasteners are the go-to choice for critical industries where strength, reliability, and corrosion resistance are non-negotiable. Whether you’re in offshore drilling, marine engineering, or chemical processing, investing in these premium fasteners ensures safety, longevity, and performance.

Ananka Fasteners stands at the forefront of fastener innovation, delivering precision-engineered solutions across the globe. If you're looking for robust and reliable Duplex or Super Duplex Fasteners, look no further!

Frequently Asked Questions (FAQ)

Q1. What is the main difference between Duplex and Super Duplex?A: Super Duplex contains increased levels of chromium, molybdenum, and nitrogen, delivering greater strength and superior corrosion resistance compared to standard Duplex.

Q2. Are Duplex Fasteners magnetic?A: Yes, due to the ferritic phase, they exhibit magnetic properties.

Q3. Can Duplex Fasteners be used in seawater applications?A: Yes, especially Super Duplex fasteners, which offer excellent resistance to seawater corrosion.

Q4. Are Duplex Fasteners more expensive than regular stainless steel?A: Yes, but they provide longer service life and reduced maintenance costs, making them cost-effective in the long run.

Q5. What certifications do your fasteners comply with?A: Our fasteners meet ASTM, ASME, DIN, ISO, and other international standards. Material Test Certificates (MTCs) along with third-party inspection reports are available upon request to ensure quality and compliance.

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Duplex 2205 M5 Grub Screws #duplexsteel #stainlessteel #duplex2205 #grubscrew #fasteners #fastenersaresexy #duplexfastener #screws #fastenersmanufacturing #machiningporn #cncmachining #precisionmachining #fastenerfair #fastenerworld #zeonexports (at Mumbai, Maharashtra) https://www.instagram.com/p/CPm69ohDnT6/?utm_medium=tumblr

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Super Duplex Fasteners: A Complete Guide

Super duplex fasteners are critical components in industries where corrosion resistance and mechanical strength are paramount. These fasteners are a blend of two key materials ferritic and austenitic stainless steel resulting in a highly durable and reliable solution. In this blog, we’ll explore what super duplex fasteners are, their composition, properties, applications, benefits, and why they are a preferred choice in challenging environments.

What Are Super Duplex Fasteners?

Super duplex fasteners are a category of fasteners made from super duplex stainless steel. This material combines the best qualities of both ferritic and austenitic stainless steels, providing an ideal balance of strength and resistance to corrosion. These fasteners are typically used in harsh environments, particularly in marine, chemical, and oil and gas industries.

Super duplex stainless steel contains a higher percentage of chromium, molybdenum, and nitrogen compared to standard duplex steels, making it significantly more resistant to pitting, crevice corrosion, and stress corrosion cracking.

Composition of Super Duplex Stainless Steel

Super duplex steel is typically composed of the following elements:

Chromium (Cr): 20–30% Offers exceptional resistance to oxidation and corrosion.

Nickel (Ni): 4–6% Enhances durability and resistance to stress corrosion cracking.

Molybdenum (Mo): 3–5% Boosts resistance to pitting and crevice corrosion in chloride heavy environments..

Nitrogen (N): 0.1–0.3% Increases strength and resistance to corrosion.

Iron (Fe): Balance The primary element, with a small portion of carbon.

Carbon (C): Typically < 0.03% Reduced to ensure maximum resistance to sensitization and carbide precipitation.

The Microstructure of Super Duplex Stainless Steel

The microstructure of super duplex stainless steel typically consists of approximately 50% ferrite and 50% austenite, making it more resistant to corrosion and stronger than both pure ferritic and austenitic steels. The balanced microstructure contributes to the material’s outstanding mechanical properties, making it suitable for demanding applications.

Key Properties of Super Duplex Fasteners

1. Corrosion Resistance

One of the primary reasons for choosing super duplex fasteners is their exceptional resistance to corrosion. They are highly resistant to chloride-induced corrosion, which makes them ideal for use in marine environments, desalination plants, and other areas where seawater or brine exposure is a concern. Super duplex fasteners also resist crevice corrosion, pitting corrosion, and stress corrosion cracking, even under extreme conditions.

2. High Strength

Super duplex fasteners offer higher tensile strength compared to standard austenitic stainless steel. This strength is due to the unique dual-phase structure of the material, allowing the fasteners to withstand higher loads and stresses. Super duplex fasteners typically have a tensile strength of 80,000–110,000 psi, which makes them suitable for heavy-duty applications.

3. Excellent Weldability

Despite their high strength, super duplex stainless steel offers good weldability. This is crucial for applications where fasteners need to be welded to other materials, such as pipes and structures, without compromising the integrity of the joints.

4. High-Temperature Resistance

Super duplex fasteners also have good resistance to elevated temperatures. This makes them a suitable choice for high-temperature applications, such as those in the oil and gas industry, where components are exposed to extreme conditions.

5. Toughness

Super duplex fasteners are highly resistant to impact and wear. They exhibit superior toughness at both high and low temperatures, which makes them ideal for applications where fatigue resistance is critical.

6. Low Carbon Content

Super duplex steels are designed with low carbon content to reduce the risk of sensitization. This ensures that the material is resistant to intergranular corrosion, which can occur when the steel is exposed to high temperatures.

Applications of Super Duplex Fasteners

Super duplex fasteners are used across a variety of industries where both strength and corrosion resistance are required. Here are some common applications:

1. Oil and Gas Industry

Fasteners made from super duplex stainless steel are commonly used in subsea oil exploration, pipelines, and offshore platforms. The corrosion resistance makes them ideal for use in environments exposed to seawater and chemicals.

2. Marine Industry

In marine environments, especially those exposed to seawater, super duplex fasteners are used in shipbuilding, offshore oil rigs, desalination plants, and other applications that require high resistance to pitting and crevice corrosion.

3. Chemical Processing

In chemical plants, where fasteners may come into contact with harsh chemicals, super duplex stainless steel fasteners provide excellent resistance to a wide range of acids and other corrosive substances.

4. Power Generation

In power generation plants, especially nuclear and thermal plants, super duplex fasteners are used in critical applications such as reactor containment vessels, cooling systems, and heat exchangers.

5. Desalination Plants

Super duplex fasteners are highly effective in desalination plants where materials are exposed to highly corrosive seawater. Their resistance to saltwater corrosion makes them ideal for ensuring the longevity and reliability of the plant’s structural components.

6. Water Treatment Plants

Similar to desalination plants, water treatment plants often use super duplex fasteners in environments where chloride concentrations are high, and corrosion resistance is essential.

Benefits of Super Duplex Fasteners

Longer Service Life: Due to their excellent corrosion resistance, super duplex fasteners last longer in harsh environments compared to other materials, reducing the need for frequent replacements.

Cost-Effectiveness: Though super duplex fasteners are initially more expensive than standard steel fasteners, their durability and resistance to corrosion lead to reduced maintenance costs and increased operational efficiency.

Enhanced Strength-to-Weight Ratio: Super duplex fasteners offer a high strength-to-weight ratio, making them suitable for applications that require both strength and minimal weight.

Reduced Maintenance: The longevity and corrosion resistance of super duplex fasteners result in fewer maintenance requirements and extended operational periods.

Versatility: Super duplex fasteners can be used in a wide range of applications across multiple industries, including oil and gas, marine, chemical, and power generation.

Why Choose Super Duplex Fasteners?

The main reason to choose super duplex fasteners over other types of fasteners is their superior resistance to corrosion and strength. They are particularly suited for environments where standard fasteners might fail due to harsh conditions, such as high chloride levels, extreme temperatures, or aggressive chemical exposure. These fasteners provide excellent reliability and ensure the structural integrity of critical systems.

Additionally, super duplex fasteners offer excellent weldability, meaning they can be easily integrated into welded structures without compromising the performance of the overall assembly.

Conclusion

Super duplex fasteners are essential components in industries that operate under harsh conditions. Their unique blend of ferritic and austenitic stainless steel provides an ideal balance of strength, toughness, and corrosion resistance. Whether in the oil and gas, marine, or chemical processing industries, these fasteners deliver unmatched performance in challenging environments.

When choosing fasteners for critical applications, super duplex fasteners provide peace of mind, knowing that you have a high-performance solution that will stand the test of time and exposure to extreme conditions.

Frequently Asked Questions (FAQ)

Q1: What is the difference between duplex and super duplex fasteners?

Duplex fasteners have a balanced microstructure of ferrite and austenite, while super duplex fasteners have a higher percentage of molybdenum, chromium, and nitrogen, providing enhanced resistance to corrosion and higher strength.

Q2: Are super duplex fasteners expensive?

Super duplex fasteners are more expensive than standard stainless steel fasteners due to their higher alloy content and specialized manufacturing process. However, their longevity and resistance to corrosion can lead to lower maintenance and replacement costs in the long term.

Q3: Can super duplex fasteners be used in high-temperature applications?

Yes, super duplex fasteners offer good high-temperature resistance and can be used in environments where temperatures exceed those typical for standard stainless steel fasteners.

Q4: Are super duplex fasteners suitable for use in marine environments?

Yes, super duplex fasteners are ideal for marine applications due to their excellent resistance to corrosion from seawater and chloride exposure.

Q5: How do I ensure that I’m purchasing genuine super duplex fasteners?

Always purchase super duplex fasteners from certified and reputable manufacturers and suppliers. Look for certifications such as ASTM, ISO, or other industry standards that ensure the fasteners meet the required specifications.

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Duplex Fasteners: A Complete Guide

Introduction

Duplex fasteners are high-performance fastening components made from duplex stainless steel, a material known for its excellent corrosion resistance, strength, and durability. These fasteners are widely used in industries that require high resistance to chloride-induced stress corrosion cracking, pitting, and crevice corrosion.

In this blog, we will explore the types, properties, benefits, applications, and standards of duplex fasteners in detail.

What Are Duplex Fasteners?

Duplex fasteners are made from duplex stainless steel, which is a combination of austenitic and ferritic microstructures. This dual-phase structure provides enhanced mechanical properties and corrosion resistance compared to conventional stainless steel fasteners.

Common duplex stainless steel grades used in fasteners include:

Duplex 2205 (UNS S32205/S31803)

Super Duplex 2507 (UNS S32750/S32760)

Lean Duplex Grades (e.g., UNS S32101, S32304)

Types of Duplex Fasteners

Duplex fasteners come in various forms, including:

Duplex Bolts - Hex bolts, carriage bolts, eye bolts, U-bolts, anchor bolts

Duplex Nuts - Hex nuts, lock nuts, flange nuts, wing nuts

Duplex Washers - Plain washers, spring washers, lock washers

Duplex Screws - Self-tapping screws, machine screws, socket head screws

Duplex Studs - Threaded rods, double-ended studs, full-threaded studs

Properties of Duplex Fasteners

1. High Strength

Duplex stainless steel has a higher yield strength than austenitic stainless steel, making it suitable for heavy-duty applications.

2. Corrosion Resistance

With high chromium (Cr), molybdenum (Mo), and nitrogen (N) content, duplex fasteners offer exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking.

3. Good Weldability

Duplex stainless steel is easier to weld than ferritic stainless steel and retains better corrosion resistance in welded conditions.

4. Toughness & Ductility

These fasteners offer a balance between toughness and hardness, making them suitable for applications requiring mechanical stability.

5. Cost-Effective

Due to the lower nickel content compared to austenitic stainless steels, duplex fasteners are often more affordable while providing superior performance.

Applications of Duplex Fasteners

Duplex fasteners are used in various industries, including:

1. Marine & Offshore

Shipbuilding

Oil & Gas platforms

Underwater pipelines

2. Chemical Processing

Acid manufacturing plants

Fertilizer industries

Heat exchangers

3. Desalination Plants

Reverse osmosis plants

Water treatment facilities

4. Pulp & Paper Industry

Digesters

Piping systems

Bleaching equipment

5. Construction & Infrastructure

Bridges

High-rise buildings

Structural components

6. Food & Beverage Industry

Brewery equipment

Dairy processing plants

Standard Specifications for Duplex Fasteners

Duplex fasteners conform to several international standards, including:

ASTM A182 – Forged Duplex Stainless Steel Fasteners

ASTM A193 – High-Temperature & High-Pressure Fasteners

ASTM A320 – Bolting Material for Low-Temperature Applications

ISO 3506 – Mechanical Properties of Corrosion-Resistant Fasteners

EN 1.4462 / EN 1.4410 – European Duplex Standards

UNS S32205 / UNS S31803 / UNS S32750 / UNS S32760 – Material Designations

Advantages of Duplex Fasteners

Superior corrosion resistance in harsh environments

Higher strength compared to austenitic stainless steel

Cost-efficient due to lower nickel content

Extended service life, reducing maintenance costs

Ideal for applications requiring high mechanical stability

Advantages of Duplex Fasteners Over Austenitic Stainless Steel Fasteners

Conclusion

Duplex fasteners are an excellent choice for industries requiring high strength, corrosion resistance, and durability. With their unique combination of austenitic and ferritic properties, they outperform conventional stainless steel fasteners in various critical applications. By choosing duplex fasteners, industries can enhance the reliability and longevity of their structures and equipment.

FAQ - Frequently Asked Questions

1. What makes duplex fasteners different from regular stainless steel fasteners?

Duplex fasteners have a dual-phase microstructure (austenitic + ferritic), providing better corrosion resistance, higher strength, and improved stress corrosion cracking resistance than standard stainless steel fasteners.

2. Are duplex fasteners magnetic?

Yes, due to their ferritic phase, duplex fasteners are partially magnetic, unlike austenitic stainless steel fasteners, which are non-magnetic.

3. Can duplex fasteners be used in seawater applications?

Yes, duplex and super duplex fasteners are highly resistant to seawater corrosion, making them ideal for marine, offshore, and desalination applications.

4. What is the temperature range for duplex fasteners?

Duplex fasteners can generally withstand temperatures between -50°C to 300°C, depending on the grade and application.

5. How do I choose the right duplex fastener for my application?

Consider the following factors:

Corrosion exposure (marine, chemical, or industrial environment)

Load-bearing capacity (strength requirements)

Temperature conditions (high or low-temperature applications)

Compliance with industry standards

6. Are duplex fasteners expensive?

While duplex fasteners cost more than standard stainless steel, they are more cost-effective than high-nickel alloys due to their superior durability and lower maintenance costs.

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The Ultimate Guide to Duplex Fasteners: Everything You Need to Know

Introduction

When it comes to securing structures, machinery, or equipment in challenging environments, choosing the right fasteners is critical. Among the many options available, duplex fasteners stand out for their exceptional strength, corrosion resistance, and durability. In this comprehensive guide, we will delve into everything you need to know about duplex fasteners, including their composition, benefits, applications, and maintenance.

What Are Duplex Fasteners?

Duplex fasteners are made from duplex stainless steel, a material known for its dual-phase microstructure. This microstructure combines roughly equal parts of austenitic and ferritic stainless steel, giving duplex stainless steel a unique balance of mechanical properties and corrosion resistance.

Key Features of Duplex Stainless Steel:

High Strength: Duplex stainless steel is approximately twice as strong as regular austenitic stainless steel, such as 304 or 316 grades.

Excellent Corrosion Resistance: It offers outstanding resistance to pitting, crevice corrosion, and stress corrosion cracking, especially in harsh environments like marine or chemical processing industries.

Cost-Effectiveness: Despite its higher initial cost, the durability and low maintenance requirements make duplex stainless steel a cost-effective choice in the long run.

Good Weldability: Duplex stainless steel can be welded effectively with proper techniques, making it suitable for a wide range of industrial applications.

Types of Duplex Fasteners

Duplex fasteners are available in a variety of forms, including:

Bolts: Widely used for joining components in high-stress environments.

Nuts: Complement bolts and ensure secure fastening.

Washers: Provide a stable surface and distribute loads evenly.

Screws: Ideal for situations where precision and corrosion resistance are essential.

Threaded Rods: Used in construction and engineering projects requiring strong, durable connections.

Grades of Duplex Stainless Steel Used in Fasteners

The most common grades of duplex stainless steel used for fasteners are:

2205 Duplex Stainless Steel

Composition: Contains approximately 22% chromium, 5% nickel, and 3% molybdenum.

Applications: Oil and gas, marine environments, and chemical processing.

2507 Super Duplex Stainless Steel

Composition: Contains 25% chromium, 7% nickel, and 4% molybdenum.

Applications: Highly corrosive environments like offshore platforms and desalination plants.

2304 Duplex Stainless Steel

Composition: Contains 23% chromium and 4% nickel, with no or minimal molybdenum.

Applications: Structural components and moderately corrosive environments.

Benefits of Using Duplex Fasteners

1. Superior Strength

The high strength of duplex stainless steel makes it ideal for applications requiring durability and the ability to withstand heavy loads.

2. Enhanced Corrosion Resistance

Duplex fasteners are resistant to:

Pitting and crevice corrosion in chloride-rich environments.

Stress corrosion cracking, even under high temperatures and pressures.

3. Longevity

The combination of strength and corrosion resistance ensures a long service life, reducing the need for frequent replacements.

4. Temperature Tolerance

Duplex fasteners perform well in both high and low-temperature conditions, maintaining their structural integrity and corrosion resistance.

5. Environmental Sustainability

Due to their durability and recyclability, duplex fasteners contribute to sustainable practices by reducing waste and resource consumption.

Applications of Duplex Fasteners

1. Marine Industry

Duplex fasteners are commonly used in shipbuilding, offshore platforms, and underwater pipelines due to their ability to withstand saltwater corrosion.

2. Oil and Gas

In the oil and gas sector, duplex fasteners are used in refineries, pipelines, and storage tanks to handle harsh chemicals and high pressures.

3. Chemical Processing

Their resistance to chemical corrosion makes duplex fasteners ideal for reactors, heat exchangers, and other chemical processing equipment.

4. Construction

In construction, duplex fasteners are employed in bridges, skyscrapers, and other structures exposed to challenging environments.

5. Desalination Plants

Desalination plants use duplex fasteners to combat the highly corrosive effects of saltwater and brine.

Maintenance and Care of Duplex Fasteners

While duplex fasteners are low-maintenance, proper care can extend their service life further. Here are some tips:

Regular Inspections: Periodically inspect fasteners for signs of wear, damage, or corrosion.

Proper Installation: Use appropriate tools and follow recommended torque settings to avoid overstressing the fasteners.

Cleaning: Remove dirt, debris, and chemical residues that may accumulate over time to prevent localized corrosion.

Welding Precautions: When welding duplex fasteners, ensure the heat input is controlled to maintain the material’s microstructure and properties.

Choosing the Right Duplex Fasteners

When selecting duplex fasteners for your project, consider the following factors:

Environmental Conditions: Evaluate the level of corrosion risk, temperature range, and mechanical stress the fasteners will face.

Grade Requirements: Choose the appropriate grade of duplex stainless steel based on the application.

Standards Compliance: Ensure the fasteners meet relevant industry standards, such as ASTM, ISO, or DIN.

Supplier Reliability: Source fasteners from reputable manufacturers or suppliers who provide quality certifications and testing reports.

Conclusion

Duplex fasteners are an excellent choice for demanding applications where strength, corrosion resistance, and durability are critical. Their unique properties make them a reliable and cost-effective solution across various industries, from marine to construction. By understanding the types, grades, and benefits of duplex fasteners, you can make informed decisions for your projects and ensure long-lasting performance.

Whether you’re dealing with harsh chemical environments, saltwater exposure, or high mechanical stresses, duplex fasteners are engineered to meet the challenge. With proper selection and maintenance, these fasteners will deliver exceptional performance for years to come.

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Duplex Fasteners: Manufacturer, Stockist, Supplier, and Exporter

Introduction to Duplex Fasteners

Duplex Fasteners are a specialized class of fasteners manufactured using duplex stainless steel, known for its dual-phase microstructure comprising austenite and ferrite. This unique composition provides exceptional mechanical strength, corrosion resistance, and durability, making duplex fasteners highly desirable across industries such as oil & gas, chemical processing, marine, and construction.

Duplex stainless steel grades, like 2205, offer superior performance compared to traditional austenitic or ferritic stainless steels. These fasteners are versatile and ideal for applications where high strength and resistance to harsh environments are crucial.

Types of Duplex Fasteners

Duplex Fasteners are available in various forms to meet diverse industrial needs, including:

Duplex Bolts: Hex bolts, U-bolts, eye bolts, and more.

Duplex Nuts: Hex nuts, lock nuts, coupling nuts, etc.

Duplex Washers: Plain washers, spring washers, and more.

Duplex Screws: Machine screws, self-tapping screws, and more.

Duplex Studs: Threaded rods, double-end studs, etc.

Each type is designed to withstand high pressure, temperature, and corrosive environments.

2205 Duplex Stainless Steel Fasteners

The 2205 grade of duplex stainless steel is among the most widely used. It offers the following benefits:

High Strength: Its yield strength is approximately double that of standard austenitic grades like 304 and 316.

Excellent Corrosion Resistance: Particularly effective in chloride-rich and acidic environments, such as marine or chemical industries.

Thermal Stability: Maintains consistent performance across a broad spectrum of temperatures.

Cost Efficiency: Provides a balance of cost and performance due to reduced material requirements in designs.

Applications of Duplex Fasteners

Duplex fasteners are employed in various sectors, including:

Marine Engineering: Shipbuilding, offshore platforms.

Oil & Gas: Refinery pipelines, storage tanks.

Chemical Processing: Reactors, heat exchangers.

Construction: Bridges, structural reinforcements.

Power Generation: Nuclear and thermal power plants.

Ananka Group: Your Trusted Duplex Fasteners Manufacturer

As a leading manufacturer, supplier, stockist, and exporter of duplex fasteners, Ananka Group specializes in delivering top-quality products worldwide. Our fasteners are manufactured to international standards and undergo rigorous quality testing to ensure unmatched reliability and performance.

Key Features of Our Duplex Fasteners:

Precision-engineered and ISO-certified.

Wide range of sizes, grades, and coatings.

Customized solutions for specific industrial needs.

Conclusion

Duplex fasteners are a reliable solution for industries requiring superior strength, corrosion resistance, and long-term performance. Their versatility and durability make them indispensable in challenging environments. Ananka Group is committed to providing premium duplex fasteners, including 2205 grade, tailored to meet the diverse needs of clients globally.

Frequently Asked Questions (FAQ)

1. What are duplex fasteners?Duplex fasteners are made from duplex stainless steel, combining high strength and excellent corrosion resistance, ideal for harsh environments.

2. What are the benefits of 2205 duplex stainless steel fasteners?2205 duplex fasteners offer high mechanical strength, superior corrosion resistance, thermal stability, and cost efficiency.

3. In which industries are duplex fasteners used?Duplex fasteners are used in marine, oil & gas, chemical processing, construction, and power generation industries.

4. Does Ananka Group provide customized duplex fasteners?Yes, Ananka Group offers customized duplex fasteners tailored to meet specific industrial requirements.

5. What standards do Ananka Group's duplex fasteners comply with?Our duplex fasteners are crafted in compliance with renowned international standards such as ASTM, ASME, and DIN.