1.4021 (X20Cr13) Material Data Sheet

1.4021 is a corrosion and acid resistant martensitic chromium steel with good corrosion resistance in moderately corrosive, chloride-free media, such as organic acids, soaps and solvents.

1.4021 is popularly known as AISI 420​​​​​.

Main application in mechanical engineering, petroleum and petrochemical industry, hydraulic industry.

Weldability:         good

Machinability:      5 (1 = very bad - 10 = good)

Polishability:        yes

Corrosion class:  1 (0 = weak - 5 = good)

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The processing with the saw is a mechanical processing of the material, which results in a significantly lower unintended deformation and increased hardness for the existing structure, such as the thermal cutting. Thus, the machined workpiece has a homogeneous structure even at the edge, which does not change in the continuation of the material.

This circumstance allows immediate finishing of the workpiece with milling or drilling . So it is not necessary to anneal the material or make a similar operation beforehand.