Mat.No. 1.2357, DIN 50CrMoV13-1, AISI S7

Mat.No. 1.2357, DIN 50CrMoV13-1, AISI S7

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  Designation by Standards   Mat. No. DIN EN AISI 1.2357 50CrMoV13-1 - S7   Chemical Composition (in weight %)   C Si Mn Cr Mo Ni V W Others 0.50 0.50 0.70 3.25 1.50 - 0.25 - -   Description S7 is a general purpose air hardening tool steel having high impact and shock resistance. It has good resistance to softening at moderately high temperatures. This combination of properties makes it suitable for many hot-work and cold-work applications. Application...


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    Designation by Standards

     

    Mat. No. DIN EN AISI
    1.2357 50CrMoV13-1 - S7

     

    Chemical Composition (in weight %)

     

    C Si Mn Cr Mo Ni V W Others
    0.50 0.50 0.70 3.25 1.50 - 0.25 - -

     

    Description
    S7 is a general purpose air hardening tool steel having high impact and shock resistance. It has good resistance to softening at moderately high temperatures. This combination of properties makes it suitable for many hot-work and cold-work applications.

    Applications
    Chisels, rivet sets, punches, driver bolts. Hot punching and shearing.

    Physical properties (avarage values) at ambient temperature
    Density [g/cm3]: 7.86

    Coefficient of Linear Thermal Expansion 10-6 oC-1

     

    20-100oC 20-200oC 20-300oC 20-400oC 20-500oC 20-600oC 20-700oC
    11.7 12.9 13.3 13.8 14.1 14.3 14.6

     

    Continuous Cooling Transformation (CCT) Diagram

    Time-Temperature Transformation (TTT) Diagram

    Soft Annealing
    Heat to 810-850oC, cool slowly in furnace. This will produce a maximum Brinell hardness of 229.

    Stress Relieving
    To relieve machining stresses for greater accuracy in hardening – first rough machine, then anneal below the critical at 649/677oC a minimum of one hour at temperature and cool slowly, then finish machine.

    Hardening
    Harden from a temperature of 930-960oC followed by air or oil quenching. Hardness after quenching is 59-61 HRC.

    Tempering
    Tempering temperature: 150-400oC.

    Tempering Temperature (oC) vs. Hardness (HRC)

     

    100oC 200oC 250oC 300oC 400oC 500oC 550oC 600oC 650oC
    59 57 55 54 53 52 52 48 41

     

    Tempering Diagram

    Forging
    Hot forming temperature: 1066-1121oC.

    Machinability
    The machinability of S7 alloy may be rated at about 75/80 % of a 1 % carbon tool steel.

    Corrosion Resistance
    Corrosion resistance of this alloy is better than that of plain carbon steels. However it will rust unless given protective treatment.

    Disclaimer
    The information and data presented herein are typical or average values and are not a guarantee of maximum or minimum values. Applications specifically suggested for material described herein are made solely for the purpose of illustration to enable the reader to make his own evaluation and are not intended as warranties, either express or implied, of fitness for these or other puposes. There is no representation that the recipient of this literature will receive updated editions as the become available.

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