AL-6XN Flanges

AL-6XN Flanges –
Manufacturer, Supplier & Exporter in Mumbai, India

Virami Steel Hub is a leading manufacturer, supplier, stockist, and exporter of high-quality AL-6XN Flanges in Mumbai, India. We specialize in providing advanced super austenitic stainless steel flanges designed for extreme corrosion resistance, high strength, and long-term durability in aggressive industrial environments.

Our AL-6XN flanges are manufactured using premium-grade raw materials and advanced forging techniques to ensure precise dimensions, superior surface finish, excellent mechanical properties, and long service life. We cater to both domestic and international markets, including the USA, Europe, the Middle East, Africa, and Southeast Asia.

With a strong focus on quality and performance, Virami Steel Hub delivers flanges that meet international standards and critical industrial requirements.

What are AL-6XN Flanges?

AL-6XN flanges are high-performance piping components made from UNS N08367, a super austenitic stainless steel known for its exceptional resistance to chloride-induced corrosion, pitting, and crevice corrosion.

AL-6XN is specifically designed to perform in environments where conventional stainless steels such as 304 and 316 fail due to aggressive corrosion.


Key Functions:

  • Provide strong and leak-proof pipe connections
  • Resist corrosion in highly aggressive environments
  • Enable easy installation and maintenance
  • Ensure long-term system reliability

Chemical Composition of AL-6XN

AL-6XN has a carefully balanced composition that enhances corrosion resistance and strength.

Typical Composition:

  • Nickel (Ni): 23.5% – 25.5%
  • Chromium (Cr): 20% – 22%
  • Molybdenum (Mo): 6% – 7%
  • Nitrogen (N): 0.18% – 0.25%
  • Iron (Fe): Balance
  • Manganese (Mn): ≤ 2%
  • Silicon (Si): ≤ 1%

The high molybdenum and nitrogen content significantly improve resistance to pitting and crevice corrosion.


Key Features of AL-6XN Flanges

AL-6XN flanges offer outstanding performance in extreme environments:

  • Exceptional Resistance to Chloride Corrosion
  • Superior Pitting and Crevice Corrosion Resistance
  • Excellent Strength and Durability
  • Resistance to Stress Corrosion Cracking
  • Good Weldability and Fabrication
  • High Performance in Seawater Applications
  • Long Service Life with Low Maintenance

Mechanical Properties

AL-6XN offers excellent mechanical strength:

  • Tensile Strength: ~690 MPa
  • Yield Strength: ~310 MPa
  • Elongation: ~35%
  • Hardness: Moderate

These properties ensure durability under pressure and mechanical stress.


Physical Properties

  • Density: ~8.1 g/cm³
  • Melting Range: ~1320–1390°C
  • Modulus of Elasticity: ~195–200 GPa
  • Thermal Conductivity: ~12 W/m•K
  • Thermal Expansion: Moderate

Corrosion Resistance

AL-6XN flanges provide exceptional resistance to:

  • Chloride-induced pitting and crevice corrosion
  • Seawater and brine environments
  • Acidic and oxidizing chemicals
  • Stress corrosion cracking
  • Industrial pollutants

This makes AL-6XN superior to standard stainless steel grades like 316L in harsh environments.


Heat Treatment

AL-6XN is typically supplied in solution annealed condition.

Heat Treatment Process:

  • Solution Annealing: ~1100–1150°C
  • Rapid cooling

This ensures maximum corrosion resistance and mechanical strength.


Weldability

AL-6XN flanges offer excellent weldability when proper procedures are followed.

Welding Methods:

  • TIG (GTAW)
  • MIG (GMAW)

Best Practices:

  • Use suitable filler materials
  • Maintain low heat input
  • Ensure clean working conditions
  • Avoid contamination

Machinability

  • Moderate machining difficulty
  • Use sharp carbide tools
  • Maintain low cutting speeds
  • Apply coolant

Standards & Specifications

AL-6XN flanges are manufactured according to:

  • ASTM A182 F62 / UNS N08367
  • ASME SA182
  • ANSI B16.5 – Pipe flanges
  • ANSI B16.47 – Large diameter flanges

These standards ensure quality and global compatibility.


Available Types of AL-6XN Flanges

We offer a wide range of flange types:

  • Weld Neck Flanges: High-pressure applications
  • Slip-On Flanges: Easy installation
  • Blind Flanges: Closing pipelines
  • Socket Weld Flanges: Small pipes
  • Threaded Flanges: No welding required
  • Lap Joint Flanges: Easy dismantling
  • Orifice Flanges: Flow measurement

Sizes & Specifications

  • Size Range: ½” to 48”
  • Pressure Ratings: 150# to 2500#
  • Construction: Forged

Surface Finish:

  • Pickled
  • Polished
  • Machined

(Custom sizes available as per requirement)


Applications of AL-6XN Flanges

AL-6XN flanges are widely used in industries requiring superior corrosion resistance.

  • Marine Industry: Used in seawater systems and offshore platforms.
  • Chemical Processing: Handles aggressive chemicals and acids.
  • Desalination Plants: Used in saltwater treatment systems.
  • Oil & Gas Industry: Used in offshore and corrosive environments.
  • Power Plants: Used in cooling systems and heat exchangers.
  • Pharmaceutical Industry: Ensures contamination-free systems.

Quality Testing & Inspection

Each flange undergoes strict quality control:

  • Chemical composition testing
  • Mechanical testing
  • Dimensional inspection
  • Surface defect testing
  • Positive Material Identification (PMI)

Mill Test Certificates (MTC) and third-party inspection reports are provided.


Packaging & Delivery

  • Export-grade wooden packaging
  • Protective wrapping
  • Proper labeling and traceability
  • Safe and timely global delivery

Why Choose Virami Steel Hub?

  • Trusted AL-6XN flange manufacturer in Mumbai
  • Extensive inventory and ready stock
  • Competitive pricing
  • Custom manufacturing solutions
  • Compliance with international standards
  • Strong export network
  • Dedicated customer support

Conclusion

AL-6XN Flanges (UNS N08367) are a premium solution for industries requiring exceptional corrosion resistance and durability in chloride-rich environments. Their superior performance makes them ideal for marine, chemical, desalination, and offshore applications.

With a commitment to quality and innovation, Virami Steel Hub delivers AL-6XN flanges that ensure long-term reliability, efficiency, and value in critical industrial systems.


FAQs – AL-6XN Flanges

(1)What are AL-6XN flanges used for?

AL-6XN flanges are used in marine, chemical processing, desalination, and offshore industries where high corrosion resistance is required.

AL-6XN is a super austenitic stainless steel (UNS N08367) known for its excellent resistance to chlorides and pitting corrosion.

Yes, AL-6XN offers significantly better resistance to pitting, crevice corrosion, and chloride attack compared to 316L.

Yes, they are specifically designed for seawater and high-salinity environments.

Yes, they can be welded using TIG and MIG processes with proper precautions.

Marine, offshore oil & gas, desalination plants, chemical processing, and power generation industries use them.

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