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420 Stainless Steel Wire

420 Stainless Steel Wire is strong, ductile, & versatile.

Stainless Steel Products manufactures Stainless Steel 420 alloy in round wire, flat wire, cut to length for the performance you need for the most demanding uses.


Stainless Steel 420 alloy is one of the most popular martensitic stainless-steel alloys, and offers a long list of benefits when made into wire:

  • martensitic stainless steel
  • corrosion resistant
  • increased strength and hardness
  • magnetic
  • good ductility in its annealed state

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

Having the right blend

Stainless Steel 420 alloy is a blend of carbon, chromium, iron, manganese, phosphorus, silicon and sulfur materials. Stainless Steel 420 alloy is composed of:


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


Density, g/cm3 (lb/in3)7.8 (0.280)
Melting point, °C (°F)1450-1510 (2650 -2750)
Specific heat capacity, J/kg·K (Btu/lb ·°F) at 20 °C (68 °F)460 (0.110)
Electrical resistivity, μΩ·m at 20°C (μΩ·in at 68 °F)0.550
Magnetic permeability600-1100 (Approximate)
Elastic modulus (Modulus of Elasticity),  Gpa (ksi)200 (29)
Thermal conductivity, W/m·K (Btu/ft · h ·°F)24.9 (14.4) at 100 °C (212 °F)
Coefficient of thermal expansion (CTE), 10-6/K (μin./in. ·°F)10.3 (5.7) at 0-100 °C (32-212 °F)
10.8 (6.0) at 0-315 °C (32-600 °F)
11.7 (6.5) at 0-538 °C (32-1000 °F)

Supplying the wire, you need

420 Stainless Steel Wire has many uses in many industries. Today, Stainless Steel 420 alloy wire is widely used in the medical, dental, firearm, industrial hardware and utensil industries. Wire manufactured from Stainless Steel 420 can be used for:

  • Cutlery
  • Surgical instruments
  • Dental instruments
  • Scissors
  • Fasteners
  • Firearms

Delivering the best 420 Stainless Steel Wire

Since 1995, Stainless Steel Products has developed and delivered high-performing, long-lasting Stainless Steel 420 alloy wire.

Stainless Steel Products has the experience, expertise and equipment to provide the Stainless Steel 420 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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