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JIS NAK80 | DIN 1.2312 | ASTM P20+S P21 Plastic Mould Steel

Port: Hu nan

Supply Ability: 2000MT per month

Min.Order Quantity: 20 Ton/Tons 20MT


  • Quick Details 

    1: NAK80 steel introduction

        NAK80 steel is a precipitation or age-hardened mold steel with a uniform through hardness of approximately 40 HRC. It is super clean, Vacuum-Arc Remelted steel with uniform grain structure, uniform hardness, and excellent dimensional stability. NAK80 tool steel is the improved steel grade of NAK55, on mirror surface, EDM surface and toughness.

    2: NAK80 Steel equivalent
    Country USA German Japan
    Standard ASTM A681 DIN EN ISO 4957 JIS G4404
    Grade P21/P20+S 1.2312 NAK80
    3: NAK80 steel chemical composition
    Grade C Si Mn P S Cr Mo
    NAK80 0.15 0.3 1.5 0.03 0.03 1.4-2 0.3-0.55
    1.2312 0.06-0.16 0.4 1.4-1.7 0.03 0.03 1.8-2.1 0.15-0.25
    P21 0.18-0.22 0.2-0.4 0.2-0.4 0.03 0.03 1.4-2 0.3-0.55
    4: NAK80 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: NAK80 steel overviews

    Size Round Dia 200-1000mm
    Plate/Flat/Block Thickness
    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

    NAK80 tool steels are used for transparent products and others for which mirror finished surface are particularly important; Products for which electrical discharge machined surfaces are very important; Typical for clear lens molds, extremely critical diamond finish applications, and molds requiring special EDM finish.

    5. Heat Treatment of JIS Steel NAK80

    Soft Annealing

        Heat NAK80 steel to 640-660oC, cool slowly. This will produce a maximum Brinell hardness of 330.


        Harden steel NAK80 from a temperature of 880-900oC followed by oil quenching. Hardness after quenching is 41 HRC.


        Heat up to 550oC with heating speed 60oC/h, then hold 5 hours at temperature and then cool slowly in the air.7. Stability

    6: Delivery condition
        For hot forged bar, usually the delivery condition is hot forged, annealed/QT rough turned/Black surface.
        For hot rolled bar, usually the delivery condition is hot rolled, annealed/QT, Black surface.
        For hot forged plate, usually the delivery condition is hot forged, annealed/QT, milled surface

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