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    W302-Isodisc en

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    W302-Isodisc en

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    dmartinchick
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    w302-isodisc_en

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    18 views5 pages

    W302-Isodisc en

    Uploaded by

    dmartinchick

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    BÖHLER W302

    HOT WORK TOOL STEELS


    Available Product Variants

    Long Products* Plates Open Die Forgings

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

    Product Description

    BÖHLER W302 ISODISC is a 5% chromium steel and corresponds to material number 1.2344 (X40CrMoV5-1). This common tool steel has
    good hot toughness as well as a high hot hardness and a high resistance against heat-checkings. The combination of these properties
    makes it a standard choice in extrusion, forging and low-pressure die casting. This material is also available as W302 ISOBLOC which is a
    remelted grade with improved cleanliness, homogeneity and toughness.

    Process Melting

    Airmelted

    Properties

    Toughness & Ductility : good


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

    Applications

    Extrusion Forging (Hot / Semi-hot) General Components for Mechanical Engineering


    Gravity / Low Pressure Die- Blow Molding High Pressure Die-Casting
    Casting
    Injection Molding Machine knife (for Oth. Automotive components (Turbochargers, Piston Rings,
    producers) Sensors, etc.)
    Press Hardening / Hot Progressive Forging Tool Holders (milling, drilling, turning & chucks)
    Stamping (Hatebur)
    Mechanical Engineering

    Technical data

    Material designation Standards


    1.2344 SEL 4957 EN ISO
    T20813 UNS G4404 JIS
    X40CrMoV5-1 EN
    H13 AISI
    SKD61 JIS

    voestalpine BÖHLER Edelstahl GmbH & Co KG


    https://www.voestalpine.com/bohler-edelstahl/de/
    HOT WORK TOOL STEELS BÖHLER W302

    Chemical composition (wt. %)

    C Si Mn Cr Mo V
    0.39 1.10 0.40 5.20 1.30 0.95

    Material characteristics

    High temperature strength High temperature toughness High temperature wear


    resistance
    BÖHLER W302

    BÖHLER W300

    BÖHLER W300

    BÖHLER W302

    BÖHLER W303

    BÖHLER W320

    BÖHLER W350

    BÖHLER W360

    BÖHLER W400

    BÖHLER W403

    Delivery condition

    Annealed
    Hardness (HB) max. 229

    Hardened and Tempered


    Hardness (HRC) 40 to 55 | bars hardened and tempered (BHT)

    Hardened and Tempered


    Hardness (HRC) 30 to 44

    voestalpine BÖHLER Edelstahl GmbH & Co KG


    https://www.voestalpine.com/bohler-edelstahl/de/
    HOT WORK TOOL STEELS BÖHLER W302

    Heat treatment

    Annealing

    Temperature 750 to 800 °C | Holding time 6 to 8 hours. Slow, controlled furnace cooling at 10 to 20°C/h (50 to 68 °F/hr) to
    1,382 to 1,472 °F approx. 600°C (1112°F), further cooling in air.

    Stress relieving

    Temperature 600 to 670 °C | For stress relief after extensive machining or for complicated tools. Holding time depending on
    1,112 to 1,238 °F tool size after complete heating 2 - 6 hours in neutral atmosphere. Slow furnace cooling.

    Hardening and Tempering


    1,020 to 1,080 Holding time after temperature equalization: 15 to 30 minutes; Quenching: Oil, salt bath (500
    Temperature °C | 1,868 to - 550°C [932-1022°F]), air, vacuum; After hardening, tempering to the desired working
    1,976 °F hardness (see tempering chart).

    Heat treatment sequence

    Continuous cooling CCT curves

    Austenitising temperature: 1020°C (1868°F)


    Holding time: 15 minutes

    ◯ Vickers hardness
    1...35 phase percentages
    0.4...18 cooling parameter, i.e. duration of cooling
    from 800 - 500°C (1472-932°F) in s x 10⁻²
    5...1 K/min cooling rate in K/min in the 800 - 500°C
    (1472-932°F) range

    voestalpine BÖHLER Edelstahl GmbH & Co KG


    https://www.voestalpine.com/bohler-edelstahl/de/
    HOT WORK TOOL STEELS BÖHLER W302

    Quantitative phase diagram

    B... Bainite
    F... Ferrite
    K... Carbide
    M... Martensite
    P... Perlite
    RA...Retained austenite

    - - - - - - Oil cooling
    - • - Air cooling

    1... Edge or face


    2... Core

    Tempering chart

    Tempering:

    Slow heating to tempering temperature immediately


    after hardening / time in furnace 1 hour for each
    0,787 inch (20 mm) of workpiece thickness but at
    least 2 hours / cooling in air. It is recommended to
    temper at least twice.

    A third tempering cycle for the purpose of stress


    relieving may be advantageous.

    1st tempering approx. 86°F (30°C) above maximum


    secondary hardness.

    2nd tempering to desired working hardness. The


    tempering chart shows average tempered hardness
    values.

    3rd for stress relieving at a temperature 86 to 122 °F


    (30 to 50°C) below highest tempering temperature.

    Recommended tempering temperature range is


    indicated by the blue area in the chart.

    Hardening temperature: 1050°C (1922°F)


    Specimen size: square 50 mm

    voestalpine BÖHLER Edelstahl GmbH & Co KG


    https://www.voestalpine.com/bohler-edelstahl/de/
    HOT WORK TOOL STEELS BÖHLER W302

    Hot strength chart

    ━━━━━ heat treated 1600 N/mm²


    - - - - - - heat treated 1200 N/mm²
    1... Tensile strength N/mm²
    2... 0.2% proof stress N/mm²
    3... Reduction of area %

    Physical Properties

    Temperature (°C | °F) 20 | 68


    Density (kg/dm³ | lb/in³) 7.8 | 0.28
    Thermal conductivity (W/(m.K) | BTU/ft h °F) 24.3 | 14.04
    Specific heat (kJ/kg K | BTU/lb °F) 0.46 | 0.1099
    Spec. electrical resistance (Ohm.mm²/m | 10⁻⁴ Ohm.inch²/ft) 0.52 | 2.46
    Modulus of elasticity (10³N/mm² | 10³ksi) 215 | 31.18

    Thermal Expansions between 20°C | 68°F and ...

    Temperature (°C | °F) 100 | 212 200 | 392 300 | 572 400 | 752 500 | 932 600 | 1,112 700 | 1,292
    Thermal expansion
    (10⁻⁶ m/(m.K) | 10⁻⁶ 11.5 | 6.4 12 | 6.7 12.2 | 6.8 12.5 | 6.9 12.9 | 7.2 13 | 7.2 13.2 | 7.3
    inch/inch.°F)

    Long Products: For additional specifications and technical requirements, please contact our regional voestalpine BÖHLER sales
    companies.

    Open Die Forgings: Product Variant may differ in terms of melting process, technical data, delivery, and surface condition as well as
    available product dimensions. Please contact the business unit Open Die Forgings of voestalpine BÖHLER Edelstahl GmbH & Co KG.

    Sheet & Plates: Product Variant may differ in terms of melting process, technical data, delivery, and surface condition as well as available
    product dimensions. Please contact voestalpine BÖHLER Bleche GmbH & Co KG.

    The data contained in this brochure is merely for general information and therefore shall not be binding on the company. We may be
    bound only through a contract explicitly stipulating such data as binding. Measurement data are laboratory values and can deviate from
    practical analyses. The manufacture of our products does not involve the use of substances detrimental to health or to the ozone layer.

    voestalpine BÖHLER Edelstahl GmbH & Co KG


    Mariazeller Straße 25
    8605 Kapfenberg, AT
    T. +43/50304/20-0
    E. info@bohler-edelstahl.at
    https://www.voestalpine.com/bohler-edelstahl/de/

    W302 ISODISC EN – 05.2024

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