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GB 3Cr2MnNiMo |DIN 1.2738 | ASTM P20+Ni 718 Plastic Mould Steel

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engineering steel, cold work tool steel, hot work tool steel, plastic mold steel, spring steel, high speed steel, stainless steel

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


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    1: DIN 1.2738 steel introduction
        DIN 1.2738 is specially used for Plastic injection die moulds. The characteristics of a material are right sharpening, photo-etching properties with high purity and good homogeneity. DIN 1.2738 is upgraded version of plastic mold steel 0f 1.2311, which normally supply in Pre hardened condition. Hardness in as supplied condition 280-320 HB with having uniform hardness. The additional nickel content of 1 % increases through hardening. It has good machinability, suitable for Texturing, fine polishability, adequate corrosion resistance, vacuum-degassed steel.
    2: DIN 1.2738 Steel equivalent
    Country China Japan Germany USA UK
    Standard GB/T 1299 JIS G4404 DIN EN ISO4957 ASTM A681 BS 4659
    Grade 3Cr2MnNiMo / 1.2738 P20+Ni / 718 /

    3: DIN 1.2738 steel chemical composition
    Grade C Mn Si Cr Ni Mo
    1.2738 0.40 1.50 0.30 1.90 1.10 0.20
    3Cr2MnNiMo 0.33 0.37 0.8 1.1 0.15 0.35 1.65 1.75 0.4 0.5 0.4 0.5
    P20+Ni / 718 0.35 0.45 1.3 1.6 0.2 0.4 1.8 2.1 1.9 1.2 0.15 1.35

    4: DIN 1.2738 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.
    5: DIN 1.2738 steel overviews
    Size Round Dia 6-1200mm
    Plate/Flat/Block Thickness
    Process EAF+LF+VD+Forged+Heat treatment(optional)
    Heat treatment 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..
    Delivery time 30-45 days
    Application  DIN 1.2738 is applicable for large & small plastic mould dies for Automotive Industries, Dies for Domestic goods , High finishing plastic Die, Boaster Plates of Presses, Die Holders & Shoe blocks for drop Hammers, Press Cassettes , Upsetter Blocker, forging dies, Different dies & mold for plastic products etc.


        Already pre-toughened; usually no heat treatment required

    Soft annealing: 
        710 to 740 °C for about 2 to 5 hours; slow controlled cooling of 10 to 20 °C per hour to about 600 °C further cooling in air, max. 220 HB

        840 to 870 °C 
        15 to 30 minutes keeping curing temperature 
        quenching in oil/hot bath/air 180 bis 220 °C 
        obtainable hardness: 53 HRC

        slow heating to tempering temperature immediately after hardening; minimum time in furnace: 1 hour per 20 mm part thickness; tempering twice is recommended.

    7: 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.