1.4057 (X17CrNi16-2) Material Data Sheet

1.4057 is a rust- and acid-resistant, martensitic chromium steel with nickel addition. The formation of chromium carbides and the associated chromium-depleted regions make this grade susceptible to intergranular corrosion.

1.4057 is also known as AISI 431​​​​​.

Application areas

The main field of application of this stainless steel is the mechanical engineering, as a thrust washer or in the petroleum and petrochemical industry. Further applications from the 1.4057 in power plant construction, in the automotive industry and in the aviation.
 

1.4057 is available in QT800 and QT900:

1.4057 material data sheet

[Translate to Englisch:] 1.4057 Werkstoffdatenblatt Download

Special features:

• suitable for high-gloss polishing

• can be use in a temperature range between -40°C and 400°

Heat treatment

 

Welding: The steel 1.4057 is weldable after preheating to 100°C - 300°C under certain precautions. Cooling to below 200°C must be avoided during welding. As additional materials for welding the 1.4370 and 1.4430 can be used if the weld does not have high strength. Hydrogenous or nitrogenous gas should not be used. Tempering colors must be removed chemically or mechanically.

Forging: 1.4057 is slowly heated to 850°C for forging. Heating takes place quickly at 1150°C - 1180°C. Thereafter forged in a temperature range between 1180°C and 950°C. This is followed by slow cooling.

Cold forming: The material 1.4057 can be deformed, punched and cold-worked to a certain point.

Corrosion resistance: The material quality is susceptible to intergranular corrosion due to the formation of chromium carbides.

Processing:

Physical Properties:

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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.