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JIS SKD7 | DIN 1.2365 | BS BH10 | ASTM H10 Hot Work Tool Steel

Port: Hu nan

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: ASTM H10 steel introduction
        H10 tool steel is one hot works tool steel in ASTM A681 standard, which is for alloy tool steel. The ASTM/AISI classifies chromium hot work tool steels as group H steels, ranging from H10, H11, h12 to H19. AISI H10 Tool Steel is one of chromium hot work tool steel that exhibits excellent resistance to softening at elevated temperature.
    H10 Tool Steel is capable of being heat treated to higher hardness than the tungsten hot work steels, and in addition offers greater toughness. H10 tool steel has good thermal fatigue characteristics, and unlike the tungsten hot work steels and H10 hot work tool steels may be safely water cooled in service.

        H10 hot works tool steel is recommended for difficult hot work tooling applications such as hot punches, die casting dies, forging dies, hot shear blades, hot gripper dies, and extrusion tooling etc.

    2: ASTM H10 steel equivalent

    Country China Japan Germany USA UK
    Standard GB/T 1299 JIS G4404 DIN EN ISO4957 ASTM A681 BS 4659
    1.2365/32CrMoV12-28  H10/T20810 BH10

    3:ASTM H10 steel chemical composition

    Grade C Mn P S Si Cr V Mo
    H10/T20810 0.35 0.45 0.20 0.70 0.03 0.03 0.80 1.25 3.00 3.75 0.25 0.75 2.00 3.00
    0.28 0.35 0.15 0.45 0.10 0.40 2.70 3.20 0.40 0.70 2.50 3.00
    SKD7 0.28 0.35 0.15 0.45 0.03 0.03 0.10 0.40 2.70 3.20 0.40 0.70 2.50 3.00
    BH10 0.30 0.40 0.40 0.35 0.35 0.75 1.10 2.80 3.20 0.30 0.50 2.65 2.95

    4: ASTM H10 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:ASTM H10 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
    Packing  Standard Packages, or as Customers Request
    Application  ASTM H10 tool steel are suitable for highly stressed hot work tools, mainly for the processing of heavy alloys, such as: Extrusion Industry: Dies, Inner Liners, Stems, Pressure Pads, Mandrels for Extrusion, Forging Industry: Forming Dies, Press Dies, Pressing Mandrels, Die Casting Industry: dies for die-casting, die inserts, hot shear blades, moulds for processing brass and light metal

    6.Heat Treatment


        Heating slowly and uniformly to 750~790℃, furnace cooling to
    600℃ at a rate 10~20℃/hr, further cooling in air. Hardness after annealing: max. 205 HB. Suitable precautions must be taken to prevent excessive carburization or decarburization.

    Stress relieving

        600 to 650°C (1112 to 1202°F) Slow cooling in furnace; intended to relieve stresses set up by extensive machining, or in complex shapes. After through heating, hold in neutral atmosphere for 1 -2 hours.


        H10 steel is a very deep hardening steel, and although oil quenching may be used where maximum hardness is required, air hardening is recommended for most applications. The use of salt bath or controlled atmosphere furnace is desirable to minimize decarburization, and if not available, pack hardening spent pitch temperature employed is usually in the range of 982°C -1037°C.

        1010 to 1050°C (1850 to 1922°F) Oil, salt bath (500-550°C / 932-1022°F), Holding time after temperature equalization: 15 to 30 minutes. Obtainable hardness: 52 -56 HRC


        Slow heating to tempering temperature immediately after hardening / time in furnace 1 hour for each 20 mm of work piece thickness but at least 2 hours / cooling in air. It is recommended to temper at least twice. A third tempering cycle for the purpose of stress relieving may be advantageous 1st tempering approx. 30°C (86°F) above maximum secondary hardness. 2nd tempering to desired working hard-ness. The tempering chart shows average tem-pered hardness values. 3rd for stress relieving at a temperature 30 -50°C (86 to 122°F) below highest tempering temperature

    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.