Finkl 420M Datasheet

Wrought Stainless Steel

Supplied by A. Finkl & Sons Co.

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Product Description
Finkl 420M is a martensitic stainless steel for plastic molds where high wear resistance and polishability are required in addition to corrosion resistance.

Finkl 420M is ALWAYS forged with a minimum of 5 to 1 reduction. It is sold in the annealed condition, with a hardness of approximately 200 on the Brinell scale, but may also be pre-hardened.

Finkl 420M stainless steel is forged utilizing wide die techniques which assure consolidated centers and fine grain structure, resulting in improved properties throughout.

Finkl 420M of Premium Quality is produced by the patented Double Vacuum Process, which consists of Vacuum Arc Degassing followed by Vacuum Arc Remelting. This process offers extraordinary cleanliness and a more unform distribution of alloys (see 420M Premium Quality Data Sheet).

Finkl 420M is 100% ultrasonically tested according tothe most rigorous standerds. It is fully warranted for a molds and dies.

The chemical composition of standerd 420 stainless has been modified in order to enhance corrosion performance.Molybdenum is added for carbide forming for improved strength, and improved corrosion resistance stabilizing element. The overall package is the best 420 type stainless steel availible.
Material Status 
  • Commercial: Active
  • Asia Pacific
  • Europe
  • Latin America
  • North America
Available Documents
Technical Datasheet (English)
Metals General
Nominal Value
Metal Type
Metals Type Analysis
Nominal Value
Type Analysis
Metals Mechanical
Nominal Value
Hardness (HB-Scale)
Metals Thermal
Nominal Value
Mean Specific Heat (70°F)
Mean CTE (752°F)
Thermal Conductivity (70°F)
1Typical properties: these are not to be construed as specifications.
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