DIN C125W, AISI Approx. W1

DIN C125W, AISI Approx. W1

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Designation by Standards Mat. No. DIN EN AISI - C125W - Approx. W1 Chemical Composition (in weight %) C Si Mn Cr Mo Ni V W Others 1.22 0.18 0.20 - - - 0.10 - - Description Low alloyed water-hardening tool steel. This steel is one of the common water hardening tool steel grades available. W1 is basically a simple high carbon steel and is easily hardened by heating and quenching in water, just as with plain carbon steel alloys.  Applications W1 is commonly used for hand operated...


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    Designation by Standards

    Mat. No. DIN EN AISI
    - C125W - Approx. W1

    Chemical Composition (in weight %)

    C Si Mn Cr Mo Ni V W Others
    1.22 0.18 0.20 - - - 0.10 - -

    Description
    Low alloyed water-hardening tool steel. This steel is one of the common water hardening tool steel grades available. W1 is basically a simple high carbon steel and is easily hardened by heating and quenching in water, just as with plain carbon steel alloys. 

    Applications
    W1 is commonly used for hand operated metal cutting tools, cold heading, embossing taps and reamers as well as cutlery. For knives, razor blades, cutting tools for machining of steels and metals, broaching tools, tools for screw cutting, chisels, drawing dies, tools for hardest stones. 

    Physical properties (avarage values) at ambient temperature
    Modulus of elasticity [103 x N/mm2]: 210 
    Density [g/cm3]: 7.85
    Thermal conductivity [W/m.K]: 45.0 
    Electric resistivity [Ohm mm2/m]: 0.20
    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
    11.1 12.1 12.9 13.5 13.9

    Soft Annealing
    Heat to 680-720oC, cool slowly. This will produce a maximum Brinell hardness of 213.

    Stress Relieving
    Stress relieving to remove machining stresses should be carried out by heating to approx. 600-650oC, 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 760-790oC followed by water quenching. Hardness after quenching is 66 HRC.

    Tempering
    Tempering temperature: See the data bellow.

    Tempering Temperature (oC) vs. Hardness (HRC)

    100oC 200oC 300oC 400oC 450oC
    66 65 57 48 45

    Tempering Diagram

    Forging
    Hot forming temperature: 1000-800oC. 

    Machinability
    W1 is a plain carbon steel and machines with ease. It is the base line of 100% machinability on which machinability of the other tool steels is compared.

    Corrosion Resistance 
    This is a plain carbon steel and it will corrode unless protected.

    Welding 
    W1 may be welded by all of the standard techniques.

    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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