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Steel AISI 420 FM

AISI 420 FM is a tool steel with sulfur that is corrosion resistant. When good machinability, good mechanical properties and corrosion resistance are required, this tool steel is recommended for aggressive plastics and plastic molds.

Steel 420 FM is used for parts in automotive and mechanical engineering, as well as for machine parts in the food industry and chemically aggressive and acid-absorbing thermoplastics.

AISI 420 FM Special Steel

International identifiers

1.2099, 4H13+S, 1.2085

Chemical composition

C Si Mn P S Cr Mo Ni V
min. 0.28 0.05 15.0
max. 0.38 0.10 17.0 1.0


Weldability: poor

Machinability: 6 (1 = poor – 10 = good)

polishability: no

Corrosion class 0 – 5: 2 (0 = weak – 5 = good)

Steel from stock

Produced to the highest Standard

Special steel quick delivery from stock

Quick delivery

Special steel from stock

From stock in US

Specialist for sawn steel blocks directly from stock

Contact person

Karol Borycki
Phone: +1 409 2395919

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