Stainless Steel 309 Wires Manufacturer, Supplier & Exporter in Mumbai, India

Stainless Steel 309 Wires Manufacturer, Supplier & Exporter in Mumbai, India

Virami Steel Hub is a prominent manufacturer, supplier, stockist, and exporter of Stainless Steel 309 Wires in Mumbai, India. We supply premium-quality SS 309 wires in various diameters, finishes, and specifications to meet the needs of fabrication, construction, heat-resistant, and industrial applications. Our products are distributed across India and exported globally to the USA, Europe, the Middle East, Africa, and Southeast Asia.

Stainless Steel 309 is a high-chromium, high-nickel austenitic stainless steel known for its excellent oxidation resistance and high-temperature strength. SS 309 wires are widely used in applications requiring resistance to elevated temperatures and moderate corrosion environments.

What Are Stainless Steel 309 Wires?

Stainless Steel 309 Wires are cold-drawn or annealed wire products manufactured from Grade 309 austenitic stainless steel. This grade contains higher chromium and nickel content compared to 304, providing superior oxidation resistance and heat resistance.

SS 309 wires are particularly suitable for:

  • High-temperature applications
  • Furnace components
  • Heat treatment equipment
  • Structural components exposed to elevated temperatures

They offer a reliable combination of strength, corrosion resistance, and thermal stability.

Key Features of Stainless Steel 309 Wires

  • Excellent oxidation resistance up to 1000°C (intermittent service)
  • High temperature strength
  • Good resistance to scaling
  • Excellent corrosion resistance in moderate environments
  • Good weldability
  • Non-magnetic in annealed condition
  • Durable and long service life

These properties make SS 309 wires ideal for heat-resistant and high-temperature industrial applications.


Chemical Composition of Stainless Steel 309

Element Composition (%)
Chromium (Cr) 22.0 – 24.0
Nickel (Ni) 12.0 – 15.0
Carbon (C) 0.20 max
Manganese (Mn) 2.0 max
Silicon (Si) 1.0 max
Phosphorus (P) 0.045 max
Sulfur (S) 0.03 max
Iron (Fe) Balance

Role of Key Elements

  • Chromium (Cr): Enhances oxidation resistance and corrosion resistance.
  • Nickel (Ni): Improves toughness and high-temperature strength.
  • Carbon (C): Contributes to strength but may affect weldability at higher levels.
  • Silicon (Si): Improves resistance to oxidation at elevated temperatures.

The higher chromium and nickel content distinguishes 309 from standard 304 stainless steel.


Mechanical Properties of Stainless Steel 309 Wires

Stainless Steel 309 wires provide strong mechanical performance:

  • Tensile Strength: 515 – 750 MPa
  • Yield Strength: 205 MPa (min)
  • Elongation: 40% (min)
  • Hardness: 217 HB (max in annealed condition)
  • Density: 7.9 – 8.0 g/cm³

Mechanical properties may vary depending on cold working and wire diameter.


Physical Properties of Stainless Steel 309

  • Melting Range: 1399 – 1454°C
  • Modulus of Elasticity: 193 GPa
  • Thermal Conductivity: 14.2 W/m·K
  • Electrical Resistivity: 0.78 µΩ·m
  • Coefficient of Thermal Expansion: 14.9 µm/m°C

SS 309 wires maintain structural stability under cyclic heating and cooling conditions.


Corrosion Resistance of Stainless Steel 309 Wires

Stainless Steel 309 offers:

  • Excellent resistance to oxidation at high temperatures
  • Good resistance to atmospheric corrosion
  • Moderate resistance to acidic environments
  • Good resistance to scaling in furnace conditions

However, it is not recommended for:

  • Highly chloride-rich environments
  • Marine applications
  • Strong reducing acids

For marine environments, higher molybdenum-containing grades may be more suitable.


Heat Resistance of Stainless Steel 309

One of the main advantages of SS 309 wires is their superior heat resistance.

  • Continuous service temperature: Up to 900°C
  • Intermittent service temperature: Up to 1000°C
  • Excellent resistance to thermal fatigue
  • Good scaling resistance in air

These properties make SS 309 ideal for high-temperature structural and furnace components.


Heat Treatment of Stainless Steel 309 Wires

Stainless Steel 309 cannot be hardened by heat treatment.

Annealing Process:

  • Heat to 1010 – 1120°C
  • Rapid cooling (air or water quenching)

Annealing restores ductility and relieves internal stresses from cold working.

Cold working increases tensile strength and hardness.


Machinability of Stainless Steel 309 Wires

SS 309 has moderate machinability.

  • Use sharp carbide tools
  • Maintain lower cutting speeds
  • Apply adequate coolant
  • Prevent work hardening

Due to its higher alloy content, machining may be slightly more challenging compared to 304.


Weldability of Stainless Steel 309 Wires

Stainless Steel 309 has good weldability.

  • Suitable for TIG (GTAW) and MIG (GMAW) welding
  • No preheating required in most cases
  • Post-weld heat treatment generally not required
  • Use compatible filler metals such as ER309

Proper welding procedures help maintain corrosion resistance and high-temperature strength.


Available Sizes & Specifications

Stainless Steel 309 wires are manufactured according to international standards:

Standards:

  • ASTM A580 (Stainless Steel Wire)
  • ASTM A276
  • ASTM A479
  • ASME SA580

Size Range:

  • Wire Diameter: 0.1 mm to 25 mm
  • Coil Weight: 1 kg to 500 kg
  • Cut Lengths: As per customer requirement

Surface Finishes:

  • Bright drawn
  • Annealed
  • Polished
  • Cold drawn
  • Pickled

Custom sizes and finishes are available based on specific industrial needs.


Applications of Stainless Steel 309 Wires

SS 309 wires are widely used in high-temperature and industrial applications.

Furnace & Heat Treatment Industry

  • Furnace parts
  • Heat exchanger components
  • Kiln liners

Power Generation

  • Boiler components
  • Thermal processing equipment

Petrochemical Industry

  • High-temperature piping components
  • Reactor parts

Automotive Industry

  • Exhaust systems
  • High-temperature fasteners

Construction & Fabrication

  • Structural components exposed to heat
  • Industrial frameworks

Its excellent oxidation resistance makes it suitable for elevated temperature applications.


Advantages of Stainless Steel 309 Wires

  • Superior high-temperature performance
  • Excellent oxidation resistance
  • Good mechanical strength
  • Reliable weldability
  • Long service life in heat-intensive applications
  • Cost-effective alternative to higher alloy heat-resistant materials

These advantages make SS 309 wires a dependable solution for heat-resistant industrial applications.


Quality Testing & Inspection

At Virami Steel Hub, all Stainless Steel 309 wires undergo strict quality control:

  • Chemical composition testing
  • Tensile strength testing
  • Hardness testing
  • Surface inspection
  • Dimensional accuracy verification
  • Positive Material Identification (PMI)

Mill Test Certificates (MTC) are provided as per ASTM and ASME standards. Third-party inspections are available upon request.


Packaging & Delivery

To ensure safe transportation and storage, SS 309 wires are:

  • Packed in moisture-proof wrapping
  • Supplied in coils or straight lengths
  • Secured in wooden boxes or pallets
  • Properly labeled for easy traceability

We ensure timely dispatch and secure global shipping.


Why Choose Virami Steel Hub for Stainless Steel 309 Wires?

  • Trusted manufacturer and exporter in Mumbai, India
  • Large ready-stock inventory
  • Competitive pricing
  • Custom sizes and finishes available
  • Compliance with international standards
  • Fast and reliable worldwide delivery

Our dedication to quality and customer satisfaction makes us a preferred supplier of stainless steel products globally.


Conclusion

Stainless Steel 309 Wires are high-chromium, high-nickel austenitic stainless steel products designed for elevated temperature and oxidation-resistant applications. With excellent heat resistance, good corrosion resistance, and strong mechanical properties, SS 309 wires are widely used in furnace, power generation, petrochemical, and automotive industries.

Virami Steel Hub supplies certified Stainless Steel 309 wires in various sizes and specifications, ensuring superior performance, durability, and reliability in demanding high-temperature industrial environments worldwide.

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