1.4057 (X17CrNi16-2) directly from stock & cut to your required dimensions
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.
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:
|Tensile strength Rm||800 - 950 N/mm2||900 - 1050 N/mm2|
|Brinell hardness||251 - 299 HB|
284 - 331 HB
|Machinability||average 5 (1 = poor - 10 = good)|
|Corrosion class||2 (0 = weak - 5 = good)|
suitable for high-gloss polishing
can be use in a temperature range between -40°C and 400°
|Temperature in °C||Cooling|
|Hot forming||1.100 - 800||Furnace, slow cooling|
|Soft annealing (+ A)||680 - 800||Furnace, air|
|Tempering (+ QT)|
|Hardening||950 - 1050||Oil, air or polymer|
|Annealing QT800||750 - 800 + 650 - 700||Water or air|
|Annealing QT900||600 - 650||Water or air|
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.
|Cold forming||is possible|
|Spent processing||is possible|
|Cold diving||not typical|
|Free-form and drop forging||rarely|
|Density in kg/dm3||7,0|
|Electr. Resistance at 20°C (Ω mm2 /m)||0,7|
|Thermal conductivity at 20°C in W/(m K)||25|
|Specific heat capacity at 20°C in J/(kg K)||460|
flat, forged, quenched and tempered
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.
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Notice: Specifications contained in following data sheet are provided as a description, liability is excluded!
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