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1.4057 (X17CrNi16-2) Material Data Sheet

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1.4057 (X17CrNi16-2) directly from stock & cut to your required dimensions

International identifiers
AISI431, BS431S29, SIS2321, GOST14Ch172N, SUS431, WL4044 , SS2321, 2H17N2
Scopes

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 material data sheet

 

Characteristics
WeldabilityGood
Machinabilitymedium 5 (1 = poor - 10 = good)
Polishingyes
Corrosion class2 (0 = weak - 5 = good)

 

Special features:

  • This steel grade can be use in a temperature range between -40°C and 400°C
  • Mirror polishing

Heat treatment

 
 Temperature in °CCooling
Hot forming1.100 - 800oven, slow cooling
   
Heat treatment  
Soft annealing (+ A)680 - 800furnace, air
Tempering (+ QT)  
Hardening950 - 1050oil, air or polymer
Annealing QT800750 - 800 + 650 - 700water or air
Annealing QT900600 - 650water 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.


Processing:

Cold forming              is possible
Spent processingis possible
Cold divingnot common
Free-form and drop forgingrare

 

Physical Properties:

Density in kg/dm37,0
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
Magnetisabilityavailable

 

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Chemical composition
1.4057
X17CrNi16-2
CSiMnPSCrMoNiV
min.0,12    15,0 1,5   
max.0,221,01,50,040,01517,0 2,5   
In stock

flat, forged, quenched and tempered

Stahlblock
Advantages of saw cut

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.

Do you have any questions?

We are happy to answer your questions and make you an offer for these and other materials. Contact us now for more information.

Yoseli Gättner

Your contact person Yoseli Gättner+49 (0) 35263-665-19+49 (0) 35263-665-35

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Notice: Specifications contained in following data sheet are provided as a description, liability is excluded!