Mat.No. 1.2343, DIN X38CrMoV5-1, AISI H11

Mat.No. 1.2343, DIN X38CrMoV5-1, AISI H11

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Designation by Standards Mat. No. DIN EN AISI 1.2343 X38CrMoV5-1 X27CrMoV51 H11 Chemical Composition (in weight %) C Si Mn Cr Mo Ni V W Others 0.37 1.0 0.38 5.15 1.30 - 0.40 - - Description H11 is one of the Hot Work, Chromium type tool steels. It is relatively low in carbon content and has good toughness and deep hardens by air quench from heat treatment. Good combination of toughness, hardness and wear resistance in hot. Resistance to softening and to cracking. Applications ...


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    Designation by Standards

    Mat. No. DIN EN AISI
    1.2343 X38CrMoV5-1 X27CrMoV51 H11

    Chemical Composition (in weight %)

    C Si Mn Cr Mo Ni V W Others
    0.37 1.0 0.38 5.15 1.30 - 0.40 - -

    Description
    H11 is one of the Hot Work, Chromium type tool steels. It is relatively low in carbon content and has good toughness and deep hardens by air quench from heat treatment. Good combination of toughness, hardness and wear resistance in hot. Resistance to softening and to cracking.

    Applications
    H11 is often used for highly stressed structural parts such as aircraft landing gear. It resists softening at temperatures up to 537oC while retaining good ductility and toughness even at strength levels on the order of 275 ksi. Tools for hot forging of light metal. Pressure die casting tools. Dies, mandrels, punchers, knives, moulds. This grade can be water cooled. For most highest requirements we recommended UTOPMO1 EFS. 

    Physical properties (avarage values) at ambient temperature
    Modulus of elasticity [103 x N/mm2]: 215, 176 (at 500oC), 165 (at 600oC) 
    Density [g/cm3]: 7.80, 7.64 (at 500oC), 7.60 (at 600oC)
    Thermal conductivity [W/m.K]: 25, 28.5 (at 500oC), 29.3 (at 600oC) 
    Electric resistivity [Ohm mm2/m]: 0.52, 0.86 (at 500oC), 0.96 (at 600oC)
    Specific heat capacity[J/g.K]: 0.46, 0.55 (at 500oC), 0.59 (at 600oC)

    Coefficient of Linear Thermal Expansion 10-6 oC-1

    20-100oC 20-200oC 20-300oC 20-400oC 20-500oC 20-600oC 20-700oC 20-700oC
    9.8 12.5 13.0 13.2 13.5 13.7 13.8 14.0

    Continuous Cooling Transformation (CCT) Diagram


    Click the image to enlarge the diagram.

    Soft Annealing
    Heat to 800-840oC, cool slowly in furnace. This will produce a maximum Brinell hardness of 229.

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

    Hardening
    Harden from a temperature of 1000-1040oC followed by air, oil quenching or warm bath quenching 500-550oC. Hardness after quenching is 50-56 HRC.

    Tempering
    Tempering temperature: See the data bellow.

    Tempering Temperature (oC) vs. Hardness (HRC)

    100oC 200oC 300oC 400oC 500oC 550oC 600oC 650oC 700oC
    53 52 52 52 54 52 48 38 30
    1845 1790 1790 1790 1910 1790 1570 1200 970

    Tempering Diagram


    Click the image to enlarge the diagram.

    Diagram Tempering Temperature – Mechanical Properties


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    Diagram Tempering Temperature – Mechanical Properties


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    Forging
    Hot forming temperature: 1100-900oC. 

    Cold Working
    Cold working may readily be accomplished on H11 by conventional methods.

    Machinability
    Machinability is reasonably good, approximately 75% that of the W group water hardening low alloy tool steels.

    Corrosion Resistance 
    This is a steel alloy and not corrosion resistant. It will rust unless protected.

    Welding 
    H11 is a readily weldable alloy by conventional methods.

    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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