Stainless Steel 321 Sheets & Plates

Stainless Steel 321 Sheets & Plates Manufacturer, Supplier & Exporter in Mumbai, India

Virami Steel Hub is a trusted manufacturer, supplier, stockist, and exporter of premium-quality Stainless Steel 321 Sheets & Plates in Mumbai, India. We specialize in providing high-performance stainless steel products designed for high-temperature applications, excellent corrosion resistance, and long-term durability.

Our SS 321 sheets and plates are manufactured using superior-grade raw materials and advanced processing techniques to ensure precise thickness, smooth surface finish, high strength, and reliable performance. We cater to both domestic and international markets, including the USA, Europe, the Middle East, Africa, and Southeast Asia.

With a strong commitment to quality and customer satisfaction, Virami Steel Hub delivers stainless steel products that meet global standards and demanding industrial requirements.

What are Stainless Steel 321 Sheets & Plates?

Stainless Steel 321 sheets and plates are titanium-stabilized austenitic stainless steel flat products, designed to resist intergranular corrosion after welding and to perform well in high-temperature environments.

The addition of titanium (Ti) stabilizes the structure by preventing carbide precipitation, making SS 321 ideal for applications involving continuous exposure to elevated temperatures.

Key Functions:

  • Provide strength and durability at high temperatures
  • Resist oxidation and intergranular corrosion
  • Enable welding without risk of corrosion
  • Suitable for thermal and industrial applications

Chemical Composition of Stainless Steel 321

SS 321 has a composition similar to SS 304 but includes titanium for stabilization.

Typical Composition:

  • Chromium (Cr): 17% – 19%
  • Nickel (Ni): 9% – 12%
  • Titanium (Ti): ≥ 5 × (C + N)
  • Carbon (C): ≤ 0.08%
  • Manganese (Mn): ≤ 2%
  • Silicon (Si): ≤ 1%
  • Iron (Fe): Balance

Titanium binds with carbon to prevent carbide precipitation.


Key Features of SS 321 Sheets & Plates

Stainless Steel 321 offers several advantages:

  • Excellent High-Temperature Resistance
  • Resistance to Intergranular Corrosion
  • Good Oxidation Resistance
  • Superior Weldability without Post-Heat Treatment
  • High Strength and Durability
  • Good Formability and Fabrication
  • Stable Performance in Thermal Cycling
  • Long Service Life in Heat Applications

Mechanical Properties

SS 321 provides reliable mechanical strength:

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

These properties ensure performance 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 321 sheets and plates offer excellent resistance to:

  • Intergranular corrosion (after welding)
  • High-temperature oxidation
  • Scaling at elevated temperatures
  • Mild chemical environments

They perform well in temperatures up to ~900°C.


Heat Treatment

  • Not hardenable by heat treatment
  • Strength can be increased through cold working

Annealing Process:

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

Weldability

SS 321 offers excellent weldability.

Welding Methods:

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

Best Practices:

  • Use compatible filler materials
  • Avoid excessive heat input
  • Clean surface before welding

Machinability

  • No post-weld annealing required
  • Use compatible filler materials
  • Maintain clean surfaces

Machinability

SS 316 sheets and plates are manufactured according to:

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

Standards & Specifications

SS 321 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

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.


Applications of Stainless Steel 321 Sheets & Plates

SS 321 sheets and plates are widely used in industries requiring heat resistance and corrosion resistance.

  • Aerospace Industry Used in exhaust systems and high-temperature components.
  • Power Plants Used in boilers, heat exchangers, and thermal systems.
  • Petrochemical Industry Used in high-temperature processing equipment.
  • Oil & Gas Industry Used in heat-resistant piping systems.
  • Automotive Industry Used in exhaust manifolds and heat shields.

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 321 Sheets & Plates are an excellent choice for high-temperature applications requiring resistance to intergranular corrosion and oxidation. Their titanium stabilization makes them ideal for welded structures and thermal environments.

With a strong focus on quality and performance, Virami Steel Hub delivers SS 321 sheets and plates that ensure long-term reliability, efficiency, and value.


FAQs – Stainless Steel 321 Sheets & Plates

(1)What is SS 321 used for?

SS 321 is used in high-temperature applications such as aerospace, power plants, and exhaust systems.

SS 321 contains titanium, which provides better resistance to intergranular corrosion and high-temperature stability.

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

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

Aerospace, petrochemical, power generation, and automotive industries widely use them.

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

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