Carbon Steel A105 / A105N Flanges

Carbon Steel A105 / A105N Flanges –
Manufacturer, Supplier & Exporter in Mumbai, India

Virami Steel Hub is a trusted manufacturer, supplier, stockist, and exporter of premium-quality Carbon Steel A105 / A105N Flanges in Mumbai, India. We specialize in delivering high-strength forged flanges that are widely used in piping systems for oil & gas, petrochemical, power generation, and industrial applications.

Our A105 and A105N flanges are manufactured using high-grade carbon steel and advanced forging techniques to ensure excellent mechanical strength, precise dimensions, superior surface finish, and long service life. We cater to both domestic and international markets, including the USA, Europe, the Middle East, Africa, and Southeast Asia.

With strict adherence to global standards and quality control processes, Virami Steel Hub ensures reliable and durable flange solutions for critical applications.

What are Carbon Steel A105 / A105N Flanges?

Carbon Steel A105 and A105N flanges are forged piping components used to connect pipes, valves, pumps, and other equipment in pressure systems. These flanges are designed for use in ambient and higher temperature service conditions.

  • A105: Standard specification for forged carbon steel flanges
  • A105N: Normalized version of A105 for improved mechanical properties

Key Functions:

  • Provide strong and leak-proof connections
  • Allow easy installation and maintenance
  • Withstand high pressure and temperature
  • Improve system flexibility and reliability

These flanges are widely used due to their strength, affordability, and versatility.


Chemical Composition of A105 / A105N

Carbon Steel A105 / A105N has a balanced composition that provides strength and durability

Typical Composition:

  • Carbon (C): ≤ 0.35%
  • Manganese (Mn): 0.60% – 1.05%
  • Phosphorus (P): ≤ 0.035%
  • Sulfur (S): ≤ 0.040%
  • Silicon (Si): 0.10% – 0.35%
  • Copper (Cu): ≤ 0.40%

This composition ensures good strength, machinability, and weldability.


Difference Between A105 and A105N

  • A105: Standard forged carbon steel flange
  • A105N: Heat-treated (normalized) version for enhanced toughness and uniform grain structure
  • A105N Advantage: Better mechanical properties, improved ductility, and higher resistance to stress.

Key Features of Carbon Steel A105 / A105N Flanges

  • High Strength and Durability
  • Excellent Pressure Handling Capability
  • Good Weldability and Machinability
  • Cost-Effective Solution
  • Suitable for High-Temperature Applications
  • Uniform Grain Structure (A105N)
  • Wide Availability and Versatility
  • Long Service Life with Proper Maintenance

Mechanical Properties

Carbon Steel A105 / A105N:

  • Tensile Strength: ~485 MPa
  • Yield Strength: ~250 MPa
  • Elongation: ~22%
  • Hardness: Moderate

The normalized version (A105N) offers improved toughness and better impact resistance.


Physical Properties

  • Density: ~7.85 g/cm³
  • Melting Range: ~1425–1540°C
  • Modulus of Elasticity: ~200 GPa
  • Thermal Conductivity: ~50 W/m•K
  • Thermal Expansion: Moderate

These properties make carbon steel flanges suitable for a wide range of industrial applications.


Corrosion Resistance

Carbon Steel A105 / A105N flanges offer moderate corrosion resistance and are typically used in:

  • Non-corrosive environments
  • Mildly corrosive conditions

Note:

For highly corrosive environments, coatings or protective measures such as painting, galvanizing, or lining are recommended.


Heat Treatment

A105:

  • Generally supplied in forged condition

A105N:

  • Normalized at high temperature
  • Air-cooled to refine grain structure

Heat treatment improves mechanical properties and structural uniformity.


Weldability

Carbon Steel A105 / A105N flanges offer excellent weldability.

Welding Methods:

  • TIG (GTAW)
  • MIG (GMAW)
  • SMAW

Best Practices:

  • Preheating may be required for thicker sections
  • Use suitable filler materials
  • Control heat input

Machinability

  • Good machinability
  • Easy to cut, shape, and drill
  • Suitable for large-scale manufacturing

This makes A105 flanges cost-effective and widely used.


Standards & Specifications

Carbon Steel A105 / A105N flanges are manufactured according to:

  • ASTM A105 / A105N
  • ASME SA105
  • ANSI B16.5 – Pipe flanges
  • ANSI B16.47 – Large diameter flanges

These standards ensure quality, safety, and global compatibility.


Available Types of Carbon Steel Flanges

We offer a wide range of flange types:

  • Weld Neck Flanges: High-pressure applications
  • Slip-On Flanges: Easy installation
  • Blind Flanges: Sealing pipe ends
  • Socket Weld Flanges: Small diameter systems
  • Threaded Flanges: No welding required
  • Lap Joint Flanges: Easy dismantling
  • Orifice Flanges: Flow measurement systems

Sizes & Specifications

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

Surface Finish Options:

  • Black (as forged)
  • Galvanized
  • Painted
  • Machined

Applications of Carbon Steel A105 / A105N Flanges

These flanges are widely used across industries due to their strength and cost-effectiveness.

  • Oil & Gas Industry Used in pipelines, refineries, and drilling equipment.
  • Petrochemical Industry Used in chemical processing plants.
  • Power Plants Used in boilers, heat exchangers, and steam systems.
  • Water Treatment Used in pipelines and water distribution systems.
  • Construction & Infrastructure Used in structural piping systems.

Quality Testing & Inspection

Each flange undergoes strict quality checks:

  • Chemical composition testing
  • Mechanical testing
  • Dimensional inspection
  • Surface defect testing
  • Hydrostatic 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 delivery worldwide

Why Choose Virami Steel Hub?

  • Trusted Carbon Steel flange manufacturer in Mumbai
  • Large inventory and ready stock
  • Competitive pricing
  • Custom manufacturing solutions
  • Compliance with international standards
  • Strong export network
  • Excellent customer support

Conclusion

Carbon Steel A105 / A105N Flanges are a reliable, cost-effective, and durable solution for a wide range of industrial piping systems. Their high strength, excellent weldability, and ability to handle pressure and temperature make them ideal for industries such as oil & gas, power generation, and construction.

With a focus on quality and customer satisfaction, Virami Steel Hub delivers A105 / A105N flanges that ensure long-term performance, reliability, and value.


FAQs – Carbon Steel A105 / A105N Flanges (AEO Optimized)

(1)What is the difference between A105 and A105N flanges?

A105 is standard forged carbon steel, while A105N is normalized (heat-treated) to improve strength, ductility, and grain structure.

(2)What are A105 flanges used for?

They are used in oil & gas, petrochemical, power plants, and general industrial piping systems.

(3)Are A105 flanges suitable for high pressure?

Yes, they are designed to handle high-pressure applications and are available in pressure ratings up to 2500#.

(4)Do A105 flanges resist corrosion?

They offer moderate corrosion resistance but may require coatings for highly corrosive environments.

(5)Can A105 flanges be welded?

Yes, they have excellent weldability and can be welded using standard methods.

(6)What industries use A105 flanges?

Oil & gas, power generation, construction, and water treatment industries widely use them.

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