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    BRM2

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    王向荣

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    BRM2

    Uploaded by

    王向荣
    6 views3 pages

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    6 views3 pages

    BRM2

    Uploaded by

    王向荣

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
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    of 3

    SIRAPID 3343 Steel

    Designation by Standards

    Brand Name Ravne Mat. No. DIN EN AISI/SAE

    SIRAPID 3343 BRM2 1.3343 S6-5-2 † HS6-5-2 M2

    Chemical Composition (in weight %)

    C Si Mn Cr Mo Ni V W Others

    0.90 max. 0.45 max. 0.40 4.15 4.95 - 1.90 6.60 -

    Description
    M2 is a higher carbon version of the M1 tool steel (Molybdenum High Speed Tool Steel). The M2 alloy has somewhat better wear
    resistance than M1. Very high resistance to softening at elevated temperatures. Very high resistance to wear. Good toughness and
    cutting capability. Deep hardening response.

    Applications
    Primarily used for cutting tools, knives, tap and spiral drills, broaching tools, milling cutters, woodworking tools, cold work tools.

    Physical properties (average values) at ambient temperature


    Modulus of elasticity [103 x N/mm2]: 217
    Density [g/cm3]: 8.12
    Thermal conductivity [W/m.K]: 19.0
    Electric resistivity [Ohm mm2/m]: 0.54
    Specific heat capacity[J/g.K]: 0.46

    Coefficient of Linear Thermal Expansion 10-6 oC-1

    20-100oC 20-200oC 20-300oC 20-400oC 20-500oC 20-600oC 20-700oC 20-800oC

    10.7 11.7 11.9 12.4 12.7 13.1 13.4 13.4


    Continuous Cooling Transformation (CCT) Diagram

    Time-Temperature Transformation (TTT) Diagram


    Soft Annealing
    Heat to 820-880oC, cool slowly in furnace. This will produce a maximum Brinell hardness of 225-280.

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

    Hardening
    Heat up to 450-600oC, then preheat to 850oC, and to 1050oC. Harden from a temperature of 1180-1230oC followed by oil, air
    quenching or warm bath 550oC. Hardness after quenching is min. 64 HRC.

    Tempering
    Tempering temperature: 3 x 1 hour at 540-560oC.

    Tempering Temperature (oC) vs. Hardness (HRC)

    200oC 300oC 400oC 500oC 525oC 550oC 575oC 600oC 650oC 700oC

    63 61 61 62.5 64 65 64 62.5 57 47

    Tempering Diagram

    Forging
    Hot forming temperature: 1120-926oC.

    Machinability
    M2 is classified as a "medium" machinability tool steel in the annealed condition. It may be shaped by grinding but is relatively poor in
    regard to capability of being ground. Its machinability rating is 50% as compared to the W group water hardening tool steel.

    Corrosion Resistance
    Not normally employed in applications requiring corrosion resistance.

    Welding
    Consult the alloy supplier for information on the advisability of welding.
    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 purposes. There is
    no representation that the recipient of this literature will receive updated editions as the become available.

    Unless otherwise specified, registered trademarks are property of SIJ Metal Ravne company. Copyright 2016 by SIJ Metal Ravne d.o.o.
    All rights reserved. Contact our Sales Office for more information.

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