Mat.No. 1.2606, DIN X37CrMoW5-1, AISI H12

Mat.No. 1.2606, DIN X37CrMoW5-1, AISI H12

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Designation by Standards Mat. No. DIN EN AISI 1.2606 X37CrMoW5-1 - H12 Chemical Composition (in weight %) C Si Mn Cr Mo Ni V W Others 0.37 1.05 0.45 5.30 1.45 - 0.28 1.30 - Description H12 hot work tool steel is a 5% chromium, general-purpose hot work steel that is characterized by excellent impact toughness. It contains less vanadium than the widely-used H13 hor work tool steel. Steel is a deep-hardening, air-hardening steel that exhibits minimal size change during heat treat...


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    Designation by Standards

    Mat. No. DIN EN AISI
    1.2606 X37CrMoW5-1 - H12

    Chemical Composition (in weight %)

    C Si Mn Cr Mo Ni V W Others
    0.37 1.05 0.45 5.30 1.45 - 0.28 1.30 -

    Description
    H12 hot work tool steel is a 5% chromium, general-purpose hot work steel that is characterized by excellent impact toughness. It contains less vanadium than the widely-used H13 hor work tool steel. Steel is a deep-hardening, air-hardening steel that exhibits minimal size change during heat treatmnet. It has good resistance to thermal fatique cracking (heat cracking) and excellent resistnce to gross cracking and thermal shock when water cooled in service.

    Applications
    H12 hot work steel is recommended for hot tooling aplications where maximum resistance to cracking is required. Such applications include hot puches, die casting dies, forgins diw, hot shear baldes, and extrusion tooling. 

    Physical properties (avarage values) at ambient temperature
    Modulus of elasticity [103 x N/mm2]: 207 
    Density [g/cm3]: 7.84
    Thermal conductivity [W/m.K]: 18.9 

    Coefficient of Linear Thermal Expansion 10-6 oC-1

    20-100oC 20-200oC 20-400oC 20-600oC
    9.8 11.0 12.1 13.0

    Soft Annealing
    Heat to 820-840oC, cool slowly in furnace. Time is 4-6 hours. This will produce a maximum Brinell hardness of 220.

    Stress Relieving
    Stress relieving to remove machining stresses should be carried out by heating to approx.650oC, holding for 1-2 hours at heat, followed by air cooling. This operation is performed to reduce distortion during heat treatment.

    Hardening
    Harden from a temperature of 1000-1050oC followed by oil, air quenching or warm bath quenching approx. 540oC. Hardness after quenching is 54 HRC.

    Tempering
    Tempering temperature: 520-700oC, at least 2-3x.

    Tempering Diagram


    Click the image to enlarge the diagram.

    Forging
    Hot forming temperature: 1100-850oC. 

    Machinability
    75-80% of a 1% carbon steel.

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

    Forms manufactured: Please see the  Dimensional Sales Program.

    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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