Stainless Steel 347 Sheets & Plates

Stainless Steel 347 Sheets & Plates Manufacturer, Supplier & Exporter in Mumbai, India

Virami Steel Hub is a trusted manufacturer, supplier, stockist, and exporter of premium-quality Stainless Steel 347 Sheets & Plates in Mumbai, India. We specialize in delivering high-performance stainless steel products designed for high-temperature applications, superior corrosion resistance, and long-term durability.

Our SS 347 sheets and plates are manufactured using premium-grade raw materials and advanced processing techniques to ensure accurate thickness, smooth surface finish, high strength, and excellent resistance to thermal stress. 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 ensures reliable stainless steel solutions for critical industrial applications.

What are Stainless Steel 347 Sheets & Plates?

Stainless Steel 347 sheets and plates are niobium (columbium)-stabilized austenitic stainless steel flat products, designed to resist intergranular corrosion and carbide precipitation during welding and high-temperature exposure.

SS 347 is similar to SS 321 but uses niobium instead of titanium for stabilization, offering enhanced performance in high-temperature and corrosive environments.

Key Functions:

  • Provide strength and durability at elevated temperatures
  • Resist intergranular corrosion
  • Enable welding without structural degradation
  • Ensure long-term performance in thermal environments

Chemical Composition of Stainless Steel 347

SS 347 contains niobium for stabilization, which improves resistance to carbide precipitation.

Typical Composition:

  • Chromium (Cr): 17% – 19%
  • Nickel (Ni): 9% – 13%
  • Niobium (Nb + Ta): ≥ 10 × C
  • Carbon (C): ≤ 0.08%
  • Manganese (Mn): ≤ 2%
  • Silicon (Si): ≤ 1%
  • Iron (Fe): Balance

Niobium stabilizes carbon, preventing intergranular corrosion.


Key Features of SS 347 Sheets & Plates

Stainless Steel 347 offers several advantages:

  • Excellent High-Temperature Resistance
  • Superior Resistance to Intergranular Corrosion
  • Good Oxidation Resistance
  • Excellent Weldability without Post-Heat Treatment
  • High Strength and Durability
  • Resistance to Thermal Fatigue
  • Good Formability and Fabrication
  • Long Service Life in Harsh Conditions

Mechanical Properties

SS 347 provides reliable mechanical strength:

  • Tensile Strength: ~515 MPa
  • Yield Strength: ~205 MPa
  • Elongation: ~40%
  • Hardness: Moderate

These properties ensure durability under thermal and mechanical stress.


Physical Properties

  • Density: ~7.9 g/cm³
  • Melting Range: ~1400–1450°C
  • Modulus of Elasticity: ~193 GPa
  • Thermal Conductivity: ~16 W/m•K
  • Thermal Expansion: ~17 µm/m°C

Corrosion & Oxidation Resistance

SS 347 sheets and plates offer excellent resistance to:

  • Intergranular corrosion
  • High-temperature oxidation
  • Scaling in elevated temperatures
  • Chemical exposure

They perform well in temperatures up to ~900°C and resist carbide precipitation during welding.


Heat Treatment

  • Not hardenable by heat treatment
  • Strength improved through cold working

Annealing Process:

  • Temperature: ~1040–1120°C
  • Rapid cooling

Weldability

SS 347 offers excellent weldability.

Welding Methods:

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

Best Practices:

  • No post-weld heat treatment required
  • Use appropriate filler materials
  • Maintain clean surfaces

Machinability

  • Moderate machinability
  • Use carbide tools
  • Maintain controlled cutting speeds
  • Apply coolant

Standards & Specifications

SS 347 sheets and plates are manufactured according to:

  • ASTM A240 – Stainless steel sheets & plates
  • ASTM A167
  • ASME SA240
  • EN standards

These standards ensure quality and global compatibility.


Standards & Specifications

SS 347 sheets and plates are manufactured according to:

  • ASTM A240 – Stainless steel sheets & plates
  • ASTM A167
  • ASME SA240
  • EN standards

These standards ensure quality and global compatibility.


Sizes & Specifications

  • Thickness: 0.5 mm to 100 mm
  • Width: Up to 2000 mm
  • Length: Custom sizes available

Surface Finish Options:

  • 2B Finish
  • BA (Bright Annealed)
  • Mirror Finish
  • Matte Finish
  • No.1 Finish

Applications of Stainless Steel 347 Sheets & Plates

SS 347 sheets and plates are widely used in industries requiring high-temperature strength and corrosion resistance.

  • Aerospace Industry Used in exhaust systems and high-temperature components.
  • Power Plants Used in boilers, superheaters, and heat exchangers.
  • Petrochemical Industry Used in high-temperature processing equipment.
  • Oil & Gas Industry Used in pipelines and heat-resistant systems.
  • Chemical Processing Used in reactors and processing units.

Quality Testing & Inspection

Each sheet and plate undergoes strict quality checks:

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

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


Packaging & Delivery

  • Export-grade packaging
  • Protective wrapping to prevent damage
  • Proper labeling and traceability
  • Safe and timely global delivery

Why Choose Virami Steel Hub?

  • Trusted stainless steel supplier in Mumbai
  • Wide range of grades and sizes
  • Competitive pricing
  • Custom solutions available
  • Compliance with international standards
  • Strong export network
  • Dedicated customer support

Conclusion

Stainless Steel 347 Sheets & Plates are a high-performance solution for industries requiring excellent resistance to intergranular corrosion, high temperatures, and thermal fatigue. Their niobium stabilization ensures long-term durability in demanding environments.

With a strong focus on quality and precision, Virami Steel Hub delivers SS 347 sheets and plates that ensure reliability, efficiency, and long-term value.


FAQs – Stainless Steel 347 Sheets & Plates

(1)What is SS 347 used for?

SS 347 is used in high-temperature applications such as aerospace, power plants, and petrochemical industries.

SS 321 uses titanium for stabilization, while SS 347 uses niobium, offering better performance in certain high-temperature conditions.

Yes, it performs well at elevated temperatures and resists oxidation and scaling.

Yes, it offers excellent weldability without the risk of carbide precipitation.

Aerospace, petrochemical, power generation, and oil & gas industries widely use them.

Yes, it is specifically designed for high-temperature environments.

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