Melting Route

    Airmelted + Remelted

    Product Description

    BÖHLER W300 ISOBLOC is a 5% chromium steel and corresponds to material number 1.2343 (X37CrMoV5-1). Produced via the electroslag remelting process (ESR), this tool steel has very high hot toughness as well as good hot hardness and very good resistance against heat-checkings. The combination of these properties makes it a top performer in high- and low-pressure die casting as well as in closed-die and open-die forging. In addition, this material has very good polishability and is therefore also often used as a molding material for plastic injection molds.

    Property Features

    • Toughness & Ductility: high
    • Wear Resistance: good
    • Machinability: very high
    • Hot Hardness (red hardness): good
    • Polishability: very high
    • Thermal conductivity: high
    • Micro-cleanliness: high

    Technical Specifications

    High temperture strength High temperature toughness High temperature wear resistance

    Material Numbers

    1.2343 X37CrMoV5-1 T20811 H11 SKD6 D1830


    4957 G4404 #207

    Chemical Composition

    Chemical composition (average %)
    0.38 0.90 0.40 5.20 1.30 0.45

    Available product shapes

    Information on Long Products ) Presented data refer exclusivly to long products. Please observe the detailed explanations at the end of the data sheet (pdf).

    • Long Products

      Long Products

    • Open Die Forgings

      Open Die Forgings

    • Plates


    • Complex Cut

      Complex Cut

    • Plate/Block


    • Precision Flat Steel

      Precision Flat Steel



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