Stainless Steel 309 Pipes and Tubes

Stainless Steel 309 Pipes and Tubes Manufacturer, Supplier & Exporter in Mumbai, India

Virami Steel Hub is a trusted manufacturer, supplier, stockist, and exporter of premium-quality Stainless Steel 309 Pipes and Tubes in Mumbai, India. We supply Stainless Steel 309 pipes and tubes across India and export to the USA, Europe, Middle East, Canada, Australia, and Southeast Asia. Our products are manufactured in accordance with international standards, ensuring excellent high-temperature performance, corrosion resistance, and mechanical strength.

Stainless Steel 309 is a high-chromium and nickel austenitic stainless steel designed for applications requiring superior heat and oxidation resistance. Stainless Steel 309 pipes and tubes are widely used in furnace components, heat exchangers, boilers, and other high-temperature industrial systems.

What is Stainless Steel 309?

Stainless Steel 309 is an austenitic stainless steel containing high chromium (23%) and nickel (13%) content, giving it exceptional resistance to oxidation and scaling at elevated temperatures. It is designed to withstand high thermal stresses and corrosive atmospheres while maintaining mechanical integrity.

Key features of Stainless Steel 309 pipes and tubes include:

  • Excellent high-temperature strength
  • Superior oxidation and scaling resistance
  • High corrosion resistance in mild chemical environments
  • Good weldability and formability
  • Non-magnetic in annealed condition
  • Suitable for high-temperature industrial applications

These properties make Stainless Steel 309 ideal for furnace, boiler, and heat-resistant piping systems.


Chemical Composition of Stainless Steel 309 (%)

  • Chromium (Cr): 22.0 – 24.0%
  • Nickel (Ni): 12.0 – 15.0%
  • Carbon (C): ≤ 0.20%
  • Manganese (Mn): ≤ 2.0%
  • Silicon (Si): ≤ 2.0%
  • Phosphorus (P): ≤ 0.045%
  • Sulfur (S): ≤ 0.03%
  • Iron (Fe): Balance

Role of Alloying Elements

  • Chromium: Provides oxidation and scaling resistance at high temperatures
  • Nickel: Enhances austenitic stability, toughness, and high-temperature strength
  • Silicon: Improves oxidation resistance in high-temperature applications
  • Low Carbon Content: Limits carbide precipitation and intergranular corrosion

The high chromium and nickel content ensures excellent high-temperature performance and corrosion resistance.


Mechanical Properties of Stainless Steel 309 Pipes and Tubes

Stainless Steel 309 provides robust mechanical performance suitable for high-temperature and structural applications:

  • Tensile Strength: ≥ 515 MPa
  • Yield Strength: ≥ 205 MPa
  • Elongation: ≥ 35%
  • Hardness: ≤ 92 HRB

These properties allow Stainless Steel 309 pipes and tubes to withstand thermal stress and mechanical loads in demanding industrial applications.


Physical Properties of Stainless Steel 309

  • Density: 8.0 g/cm³
  • Melting Range: 1400 – 1450°C
  • Thermal Conductivity: 16 W/m·K
  • Modulus of Elasticity: 193 GPa
  • Electrical Resistivity: 0.72 µΩ·m

Stainless Steel 309 maintains stability, mechanical strength, and corrosion resistance under high-temperature conditions.


High-Temperature and Corrosion Resistance

Stainless Steel 309 pipes and tubes offer excellent resistance to:

  • Oxidation and scaling at temperatures up to 1000°C
  • Hot corrosive gases
  • Mild chemical corrosion
  • Furnace and boiler applications

Its high chromium and nickel content makes it highly resistant to scaling, pitting, and creep at elevated temperatures.


Weldability & Fabrication

Stainless Steel 309 pipes and tubes are suitable for fabrication in high-temperature environments:

  • Compatible with TIG, MIG, and arc welding
  • Excellent bending and forming capabilities
  • Smooth cutting, drilling, and machining
  • Maintains high-temperature properties after welding
  • Easy surface finishing for industrial applications

These properties make Stainless Steel 309 ideal for high-temperature piping, furnace components, and heat exchanger tubes.


Types of Stainless Steel 309 Pipes and Tubes

Virami Steel Hub supplies Stainless Steel 309 in multiple forms:

  • Seamless Pipes
  • Welded Pipes
  • ERW Pipes
  • Round Tubes
  • Square Tubes
  • Rectangular Tubes

Available in various diameters, wall thicknesses, and lengths according to industrial requirements.


Standards and Specifications

Stainless Steel 309 pipes and tubes are manufactured in accordance with international standards:

  • ASTM A312
  • ASTM A213
  • ASTM A249
  • ASTM A269
  • ASTM A554

These standards ensure dimensional accuracy, mechanical strength, and corrosion resistance.


Surface Finishes Available

We provide Stainless Steel 309 pipes and tubes in multiple finishes:

  • Annealed & Pickled
  • 2B Finish
  • No.1 Finish
  • Polished Finish
  • Mirror Finish

Surface finishes enhance corrosion resistance, heat resistance, and aesthetic appeal.


Applications of Stainless Steel 309 Pipes and Tubes

High-Temperature Industrial Applications

  • Furnace components
  • Boiler tubes
  • Heat exchangers
  • Chimneys and stack liners

Chemical Industry

  • Mild chemical processing
  • Piping in high-temperature chemical lines

Power Generation

  • Thermal power plants
  • Superheater and boiler piping

Other Industrial Applications

  • Structural supports in high-temperature zones
  • Pressure piping and ducts
  • Industrial heating equipment

Stainless Steel 309 pipes and tubes are widely used where high-temperature strength and oxidation resistance are critical.


Advantages of Stainless Steel 309 Pipes and Tubes

  • Exceptional oxidation and scaling resistance at high temperatures
  • High mechanical strength and durability
  • Excellent weldability and fabrication properties
  • Retains corrosion resistance after welding and heat exposure
  • Ideal for high-temperature industrial and chemical applications
  • Long service life in extreme conditions

These features make Stainless Steel 309 a preferred choice for furnace, boiler, and heat-resistant piping applications.


Quality Testing and Inspection

At Virami Steel Hub, all Stainless Steel 309 pipes and tubes undergo strict quality testing:

  • Chemical composition analysis
  • Mechanical property testing
  • Hydrostatic and pressure testing
  • Positive Material Identification (PMI)
  • Dimensional inspection
  • Surface finish verification

Mill Test Certificates (MTC) are provided as per ASTM standards. Third-party inspection is available on request.


Why Choose Virami Steel Hub for Stainless Steel 309 Pipes & Tubes?

  • Trusted stainless steel manufacturer and supplier in Mumbai
  • Wide inventory for immediate dispatch
  • Custom sizes, wall thicknesses, and finishes available
  • Competitive pricing for domestic and international supply
  • Commitment to quality, on-time delivery, and customer satisfaction
  • Expert technical support for material selection and application

Conclusion

Stainless Steel 309 Pipes and Tubes are high-chromium, nickel-bearing austenitic stainless steel products designed for high-temperature and oxidation-resistant applications. With excellent mechanical strength, high-temperature stability, and corrosion resistance, Stainless Steel 309 is ideal for furnace components, boiler piping, heat exchangers, and chemical processing systems.

Virami Steel Hub supplies premium-quality Stainless Steel 309 pipes and tubes that meet international standards and client requirements, offering durable and reliable stainless steel solutions for high-temperature industrial applications.

Products / Services