EN 1.4028, ASTM 420 ( 420B ) Martensitic stainless steel plates

EN 1.4028, ASTM 420 ( 420B ) Martensitic stainless steel plates

Stainless steel grade AISI 420B is medium-hardness martensitic grade. Corrosion resistant in water and steam.

Applied for cutting utensils, surgical instruments, measuring tools, mechanical parts esp. subject to wear.

Designations

Chemical composition ( in weight % )

Applications

Cutting utensils and surgical instruments, Measuring tools, Mechanical parts especially in wear resistant applications,

Springs, Printing industry...

Heat treatment

Annealing

Annealing of this material can be performed by heating uniformly to 840 - 900°C (1544 - 1652°F) and

held until the temperature is uniform throughout the section.

Soaking and cooling is required.

Hardening

Stainless steel grade 420J2 can be hardened by heating 950 - 1020°C (1742 - 1868°F) and

held until temperature is uniform throughout the section.

This should be followed by quenching in oil or air cooling.

Tempering

Tempering should be done when it is slightly warm.

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