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321 Stainless Steel Round, Flat, & Cut-to-Length Wire

Versatile, strong, high temperature.

Stainless Steel Products manufactures Stainless Steel 321 alloy in round wire, flat wire, cut to length for the performance you need for the most demanding uses.


Stainless Steel 321 alloy is one of the most popular steel alloys, and offers a long list of benefits when made into wire:

  • Corrosion resistant
  • high temperature
  • strong
  • chemical resistant
  • resistant to oxidation
  • good creep strengh

Having the right blend

Stainless Steel 321 alloy is a blend of carbon, chromium, iron, manganese, nickel, nitrogen, phosphorus, silicon, sulfur and titanium materials. Stainless Steel 321 alloy is composed of:

Carbon0.08, max.
Silicone1.00, max.
Manganese2.00, max.
Phosphorus0.045, max.
Sulfur0.030, max.

*This is for information purposes only. Actual numbers may vary.


Density, g/cm3 (lb/in3)7.9 (0.290)
Melting point, °C (°F)1400-1425 (2550 -2600)
Specific heat capacity, J/kg·K (Btu/lb ·°F) at 20 °C (68 °F)500 (0.120)
Electrical resistivity, μΩ·m at 20°C (μΩ·in at 68 °F)0.720
Magnetic permeability1.02 (Approximate)
Elastic modulus (Modulus of Elasticity),  Gpa (ksi)193 (28)
Thermal conductivity, W/m·K (Btu/ft · h ·°F)16.1 (9.3) at 100 °C (212 °F)
22.2 (12.8) at 500 °C (932 °F)
Coefficient of thermal expansion (CTE), 10-6/K (μin./in. ·°F)16.6 (9.2) at 0-100 °C (32-212 °F)
17.2 (9.6) at 0-315 °C (32-600 °F)
18.6 (10.3) at 0-538 °C (32-1000 °F)

*This is for information purposes only. Actual numbers may vary.

Supplying the wire, you need

Wire made from Stainless Steel 321 alloy has many uses in many industries. Today, 321 Stainless Steel wire is widely used in the automotive, aerospace, heating, pollution control, chemical processing and energy industries. Wire manufactured from Stainless Steel 321 can be used for:

  • heating elements
  • high temperature mesh
  • filtration
  • Pollution control
  • furnaces
  • chemical processing
  • exhaust systems
  • aircraft components
  • radiant heating
  • bellows
  • oil refinery equipment

Delivering the best Stainless Steel 321 alloy wire

Since 1995, Stainless Steel Products has developed and delivered high-performing, long-lasting Stainless Steel 321 alloy wire.

Stainless Steel Products has the experience, expertise and equipment to provide the Stainless Steel 321 alloy round wire, flat wire, cut to length you require.


  • Operating since 1995
  • Supply and serve industries and manufacturers across the globe


  • Dedicated engineering assistance from a worldwide network of technical professionals
  • Keen attention to detail in all manufacturing phases
  • Superior customer service
  • Expedient, timely delivery


  • Headquartered in the United States of America
  • Utilize rolling mills, drawing, spooling and coiling equipment.
  • In-house round and flat wire cleaning available
  • Expansive inventory of materials in stock for quick shipment


Ferrous or non-ferrous, we work with most alloys available on the market today. Below is a list by major alloy family class:

Other Alloys

Industries We Serve

SSP works with all major industries on various product applications.  Take advantage of our breadth of knowledge on a wide variety of specifications and requirements!

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