• 9341 Penn Ave S, Bloomington, MN 55431
  • 800-447-3317

We stock 420 MOD in round bar form. No minimum order.

420 Modified Stainless Steel is a type of martensitic stainless steel that has been modified with the addition of molybdenum and vanadium. This modification enhances the material's corrosion resistance, toughness, and strength. Here are some properties and uses of 420 Modified Stainless Steel:


  • Corrosion resistance: 420 Modified Stainless Steel has good resistance to corrosion in mild environments.
  • Hardness: The material has high hardness and wear resistance.
  • Toughness: The addition of molybdenum and vanadium improves the toughness of the material, making it less brittle.
  • Machinability: 420 Modified Stainless Steel is easily machinable due to its low carbon content.
  • Heat resistance: It has moderate resistance to heat, but not suitable for high-temperature applications.


  • Medical instruments and equipment: The material's corrosion resistance, hardness, and machinability make it suitable for use in surgical instruments and medical equipment.
  • Industrial equipment: The material's hardness and wear resistance make it suitable for use in industrial equipment such as pumps, valves, and gears.
  • Cutlery: 420 Modified Stainless Steel is used to make high-quality knives and cutlery due to its corrosion resistance and hardness.
  • Aerospace and defense: It's used in the manufacture of aircraft components, firearms, and other military equipment.

Overall, 420 Modified Stainless Steel is a versatile material that offers a good combination of corrosion resistance, toughness, and strength, making it a popular choice in various industries.


Chemical Data, Mechanical Properties and Specifications for 420 MOD Stainless Steel

Chemical Range For 420 MOD
Element Minimum Maximum
Carbon 0.37 0.45
Chromium 15.0 16.0
Iron Balance --
Manganese -- 0.60
Molybdenum 1.50 1.90
Nickel 0.15 0.25
Phosphorus -- 0.02
Silicon -- 0.60
Sulphur -- 0.005
Vanadium 0.20 0.40


Typical Mechanical Properties for 420 MOD
Form Tensile Strength Yield Strength Elongation at Break
Annealed Bar 100 ksi 80 ksi to 95 ksi 20%


DIN X40CrMoVN16-2)
AMS 5925 (Chems)
UNS S42025
Chronifer ® M-15 KL
X15TN ®

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