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GB 9CrWMn | JIS SKS3 | DIN 1.2510 | ASTM O1 Cold 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

E-mail:export@qilucs.com

  • Quick Details

    1: ASTM O1 steel introduction

        ISI / ASTM A681 O1 tool steel is a low alloy cold work tool steel that must be oil-quenched in heat treatment. Tools and dies made from O1 tool steel flat or rounds will have good wearing and abrasive qualities since the tungsten and higher chromium content gives improved wear resistance.

        ASTM O1 tool steel has deep hardening properties with fine grain structure with unusual toughness. AISI O1 tool steel offers good durability, gives excellent wear resistance and holds a good cutting edge. O1 cold work tool steels also has good response to heat treatment with small dimensional changes.


    2: ASTM O1 Steel equivalent
    Country China Japan Germany USA UK
    Standard GB/T 1299 JIS G4404 DIN EN ISO4957 ASTM A681 BS 4659
    Grade 9CrWMn SKS3 1.2510/100MnCrW4 O1

    3: ASTM O1 steel chemical composition
    Grade C Mn P S Si Cr V W
    O1 0.85 1.00 1.00 1.40 0.03 0.03 0.10 0.50 0.40 0.70 . . . 0.30 0.40 0.60
    1.2510 0.90 1.05 1.00 1.20 0.03 0.03 0.15 0.35 0.50 0.70 0.05 0.15 0.50 0.70
    SKS3 0.90 1.00 0.90 1.20 0.03 0.03
    0.35 0.50 1.00 . . . . . . 0.50 1.00

    4: ASTM O1 steel mechanical properties
    Grade Tensile strength Yield strength Elongation Reduction Impact Value Hardness
    ASTM O1          
      
    5: ASTM O1 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 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..
    Packing Standard Packages, or as Customers Request
    Delivery time 30-45 days
    Application  ASTM O1 tool steel are suitable for blanking, forming, and trim dies, gages, slitting cutters, punches, bolster dies, knock-out pins, thread roll dies, bending dies, plastic mold dies, shims, cams, machine ways, stamps, machine parts, jigs, cutter templates, swaging dies, etc.



    6. AISI O1 Tool Steel Heat Treatment

    Anneal

        Annealing must be performed after hot working and before re-hardening.

        Heat at a rate not exceeding 222°C per hour to 802-816°C, and hold at temperature for 1 hour per inch (25.4mm) of maximum thickness; 2 hours minimum. Then cool slowly with the furnace at a rate not exceeding 28°C per hourto 538°C. Continue cooling to ambient temperature in the furnace or in air. The resultant hardness should be a maximum of 212 HBW.

    Stress Relief of Unhardened Material

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

    Hardening

        1 )Preheat: Warm slightly before charging into the preheat furnace, which should be operating at about 1100°-1200°F.

        2) Hardening: Heat to 1475 to 1500° F. Soak at heat for 30 minutes per inch of thickness.

        3) Quench: Quench O1 steel in warm oil and allow to cool in the oil until a temperature of 125°-150°F has been reached, or to where the part can be held in the bare hand, and temper immediately.

        4) Temper: Normally oil hardening steels need to be single tempered only. However, double tempering may sometimes be preferred. Soak at heat for 2 hours per inch of thickness for each temper. Air cool to room temperature between tempers. The normal tempering range for this grade is 300 to 450° F.

     Stress Relief Temper

        A stress relief temper for hardened material is strongly recommended after significant grinding, or welding, or EDM. Select a temperature that is 25 or 50° F lower than the last tempering temperature used.


    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.