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JIS SKH51 | DIN 1.3343 | ASTM M2 High Speed Steel

Port: Hu nan

Supply Ability: 10,000 Ton/Tons per Year 2000MT/month

Min.Order Quantity: 10 Ton/Tons 20MT

E-mail：export@qilucs.com

Product Detail
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    1: M2 steel introduction
        AISI M2 Tool Steel is molybdenum based high-speed steel in tungsten-molybdenum series. HSS grade steel M2 is a medium alloyed high speed steel which has good machinability. The H-SS M2 chemical composition gives a good combination of well-balanced toughness, wear resistance and red hardness properties. Widely used for cutting tools such as twist drills, taps, milling cutters, saws, knives etc. Also commonly used in cold work punches and dies and cutting applications involving high speed and light cuts.

        Grade M2 High Speed Steel is by far the most popular high speed steel replacing high speed steel grade T1 in most applications because of its superior properties and relative economy. 


    2: M2 Steel equivalent
    Country Japan Germany Britain USA
    Standard JIS G4403
    		 DIN EN ISO 4957 BS 4659 ASTM A600
    Grade SKH51
    		 1.3343 / M2
     
    3: M2 steel chemical composition
    ASTM A600 C Mn P S Si Cr V Mo W
    M2  0.78-0.88
    		 0.15-0.40
    		 0.03-0.03
    		 0.20-0.45
    		 3.75-4.50
    		 1.75-2.20
    		 4.50-5.50
    		 5.50-6.75
    1.3343 0.86-0.94
    		 …
    		 …
    		 0.45
    		 3.80-4.50
    		 1.70-2.10
    		 4.70-5.20
    		 5.90-6.70
    SKH51 0.80-0.88
    		 0.40
    		 0.03-0.03
    		 0.45
    		 3.80-4.50
    		 1.70-2.10
    		 4.70-5.20
    		 5.90-6.70
     
    4: M2 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: M2 steel overviews
    Size Round Dia 6-1200mm
    Plate/Flat/Block Thickness
    6mm-500mm
    Width
    20mm-1000mm
    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 Typical applications for M2 high speed steel are twist drills, reamers, broaching tools, taps, milling tools, metal saws. M2 is suitable for cold forming tools such as extrusion rams and dies, also widely used in all kinds of cutting tools, knife and punches and die applications, plastic moulds with elevated wear resistance and screws.


    7. Heat Treatment of M2 Steel HSS

    Anneal

        Heat to 1600° F, soak thoroughly at heat. Furnace cool 25° F per hour to 900° F, air cool to room temperature. Approximate annealed hardness 241 Maximum Brinell.

        Stress Relief of Unhardened Material: Heat slowly to 1200 to 1250° F. Soak for two hours per inch of thickness at heat. Slow cool (furnace cool if possible) to room temperature.

    Harden

        Heat slowly to 1550° F, soak thoroughly, heat to 1850° F, soak thoroughly. Soak time in the furnace varies from a few minutes to 15 minutes, depending tool size, heat capacity of the furnace, and the size of the charge. – Heat to 2150 to 2200° F for max. toughness and minimum distortion. – Heat to 2250 to 2275° F for max. hardness and abrasion resistance.

    Quench

        For full hardness, oil quench to 150-200° F. Air quench to 150° F. When quenching in hot salt maintain the quench just above the Ms temperature. After equalizing withdraw parts from the hot salt and air cooled to 150° F.

    Temper

        Double temper is mandatory, three tempers are sometimes preferred. Soak for 2 hours per inch of thickness. Air cool to room temperature between tempers. The best tempering range for hardness, strength and toughness is 1000 to 1050° F.


    8: 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 block, usually the delivery condition is hot forged, annealed/QT, milled surface/Black surface
        For hot rolled plate, usually the delivery condition is hot rolled, annealed/QT, black surface.
        For cold drawn bar, usually the delivery condition is cold drawn, annealed/QT, peeled/black surface