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GB Cr12Mo1V1 | JIS SKD11 | ASTM D2 | DIN 1.2379 Cold Work Tool Steel

Port: Hu nan

D2 Steel, 1.2379 steel, SKD11 steel, D2 round bar, D2 plate, D2 chemical composition, D2 steel equivalent

Alloy Structural Steel, Alloy Tool Steel, Carbon Structural Steel, Carbon Tool Steel, Bearing Steel, Spring Steel ,Stainless Steel, Refractory Steel, Roll Steel, Pinion Steel. Additionally, the company also has the capacity to forge round steel, steel flat, square steel, module, shaft and roller

E-mail:export@qilucs.com

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    1: D2 steel introduction

        Cold-work tool steels include the high-carbon, high-chromium steels or group D steels, D2 is the most popular one,these steels all contain 1.5% to 2.35% of carbon and 12% of chromium. D2 steel is an air hardening, high-carbon, high-chromium tool steel. It has high wear and abrasion resistant properties. It is heat treatable and will offer a hardness in the range 55-62 HRC, and is machinable in the annealed condition. D2 steel shows little distortion on correct hardening. D2 steel’s high chromium content gives it mild corrosion resisting properties in the hardened condition.

        If customer need better machinability, we recommend A2, because A2 has a chromium content of 5% and is more readily machinable.

     

    2: D2 steel application

       D2 tool steels are used for long run tooling applications, where wear resistance is important, such as blanking or forming dies, punches, forming rolls, knives, slitters, shear blades, tools, scrap choppers, tyre shredders and so on.

     

    3: D2 Steel equivalent

    Country

    China

    Japan

    Germany

    USA

    Standard

    GB/T 1299

    JIS G4404

    EN ISO 4957

    ASTM A681

    Grade

    Cr12Mo1V1

    SKD11

    1.2379

    D2

     

    4: D2 steel chemical composition

    Grade

    C

    Si

    Mn

    P

    S

    Cr

    Mo

    V

    Cr12Mo1V1

     

     

     

     

     

     

     

     

    SKD11

    1.4-1.6

    0.4

    0.6

    0.03

    0.03

    11-13

    0.8-1.2

    0.2-0.5

    1.2379

    1.45-1.6

    0.15-0.6

    0.2-0.6

    0.03

    0.03

    11-13

    0.7-1.0

    0.7-1.0

    D2

    1.4-1.6

    0.1-0.6

    0.1-0.6

    0.03

    0.03

    11-13

    0.7-1.2

    0.5-1.1

     

    5: D2 steel mechanical properties

        The mechanical properties mainly include tensile strength, yield strength, elongation, area or reduction, hardness, impact value, non-metalic inclusion etc. Different heat treatment, the mechanical properties will be different, such as normalized, tempered, QT. If you want to know the properties, kindly contact the salesman.


    6ASTM D2 steel overviews

    Size Round Dia 6-1200mm
    Plate/Flat/Block Thickness
    6mm-500mm
    Width
    20mm-1000mm
    Process EAF+LF+VD+Forged+Heat treatment(optional)
    Heat teatment Normalized ; Annealed ; Quenched ; Tempered
    Surface condition Black; Peeled; Polished; Machined; Grinded; Turned; Milled
    Delivery condition Forged; Hot rolled; Cold drawn
    Test Tensile strength, Yield strength, elongation, area of reduction, impact value, hardness, grain size, ultrasonic test, US inspection, magnetic particle testing, etc. 
    Payment terms T/T;L/C;/Money gram/ Paypal
    Trade terms FOB; CIF; C&F; etc..
    Packing Standard Packages, or as Customers Request
    Delivery time 30-45 days
    Application  D2 tool steel are as below:Blanking Dies, Forming Dies, Coining Dies, Slitting Cutters, Heading Tools, Long Punches, Forming Rolls, Edging Rolls, Master Tools, Beading Rolls, Intricate Punches, Extrusion Dies, Drawing Dies, Lamination Dies, Thread Rolling Dies, Shear Blades, Burnishing Tools, Gauges, Knurls, Wear Parts.

    7: D2 steel heating treatment

        ASTM D2 steels alloy should be preheated very slowly to 815℃ (1500°F) and then temperature can be increased to 1010oC (1850°F). They are then held at 1010oC (1850°F) for 20 to 45 minutes and air cooled (air quenched).

    Annealing

        Annealing of D2 tool steels material should be done at 871 to 898°C (1600 to 1650°F) followed by slow furnace cooling at 4.4°C (40°F) per hour or less.after which cooling rate may be increased. Suitable precautions must be taken to prevent excessive carburization or decarburization.

    Stress Relieving

        When desirable to relieve the strains of machining, heat D2 grade steel slowly to 1050°-1250°F, allow to equalize, and then cool in still air (Strain Relieving).

        Preheat Prior To Hardening

        Preheat slowly to 1350°-1450°F and hold at this temperature until grade steel D2 material is uniformly heated.

    Hardening

        After thorough preheating, heat to 1800°-1850°F. Hold the work piece at the hardening temperature until it is completely and uniformly heated.

    Quenching

        AISI D2 steel tool material is an air hardening steel and will develop hardness on cooling in still air. To avoid scaling and prevent decarburization of the work piece surface, controlled atmosphere or vacuum furnaces are recommended. If these furnaces are not available, pack hardening, salt baths or wrapping the piece in stainless steel foil will provide some degree of surface protection in the hardening process. Parts should be allowed to cool to 150F, or to where they can be held in the bare hand, and then temper immediately.

    Tempering

        The tempering temperature on material D2 steel may be varied according to the desired hardness. D2 steels can be tempered at 204°C (400°F) for achieving Rockwell C hardness of 61 and at 537°C (1000°F) for a Rockwell C hardness of 54.


    8: Delivery condition

        For hot forged or hot rolled bar, usually the delivery condition is hot forged or rolled, annealed, rough turned.

        For hot forged plate, usually the delivery condition is hot forged, annealed, milled surface.

        For hot rolled plate, usually the delivery condition is hot rolled, annealed, black surface.