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Hot Rolled 1.6511 SNCM439 EN24 SAE4340 40CrNiMo Engineering Steel Round Bar

Categories Engineering Steel Bar
Brand Name: CF STEEL
Model Number: 1.6511 SNCM439 EN24 SAE4340 40CrNiMo
Certification: ISO, Mill Certificate, SGS
Place of Origin: China
MOQ: Negotiable
Price: Negotiable
Payment Terms: L/C, T/T
Supply Ability: 1000t/Month
Delivery Time: 7-15 days
Packaging Details: Export Standard Packing or Customers'demand
Standard: AISI,DIN,ASTM,GB
Surface: Turned, black
Technique: Forged,Hot Rolled
Test: SGS / Ut 100% / Element Testing
Ut standard: Sep 1921-84 class 3 C/C to D/D
Heat Treatment: Annealing/Q+T
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    Hot Rolled 1.6511 SNCM439 EN24 SAE4340 40CrNiMo Engineering Steel Round Bar

    Hot Rolled 1.6511 SNCM439 EN24 SAE4340 40CrNiMo Engineering Steel Round Bar


    1. 4340 steel introduction
    AISI 4340 steel is a medium carbon, low alloy steel known for its toughness and strength in relatively large sections. AISI 4340 is also one kind of nickel chromium molybdenum steels. 4340 alloy steel is generally supplied hardened and tempered in the tensile range of 930 - 1080 Mpa. Pre hardened and tempered 4340 steels can be further surface hardened by flame or induction hardening and by nitriding. The 4340 steel has good shock and impact resistance as well as wear and abrasion resistance in the hardened condition. AISI 4340 steel properties offer good ductility in the annealed condition, allowing it to be bent or formed. Fusion and resistance welding is also possible with our 4340 alloy steel. ASTM 4340 material is often utilized where other alloy steels do not have the hardenability to give the strength required. For highly stressed parts it is excellent choice. AISI 4340 alloy steel can also be machined by all customary methods.

    2. 4340 Steel equivalent

    CountryJapanGermanyBritainUSA
    StandardJIS G4103EN10250BS970ASTM A29
    GradeSNCM43936CrNiMo4/1.6511EN24/817M404340


    3. 4340 steel chemical composition

    GradeCSiMnPSCrMoNi
    43400.38-0.430.15-0.350.6-0.80.0350.040.7-090.2-0.31.65-2.0
    36CrNiMo40.32-0.40.40.5-0.80.0350.0350.9-1.20.15-0.3
    EN240.36-0.440.1-0.40.45-0.70.0350.041.0-1.40.2-0.351.3-1.7
    SNCM4390.36-0.430.15-0.350.6-0.90.030.030.6-1.00.15-0.31.6-2.0


    4. 4340 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. Ready Stock:
    Round Bar diameter 14-460mm.All the sizes as require can be customerized as fresh production with MOQ.

    6. Delivery state:
    Hot rolled, Heat Treatment,black, hardness or tempered hardness:28-34 HRC.
    Annealing:HBS<=235.

    7. Delivery time
    For abundant stock, 15-20 days.For customized products, 30-50 days.
    We have full set of equipement (sawing machine/grinding/polishing machine) to make customer's specification.


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    About Us
    Guangzhou Changfeng Steel Co., Ltd.
    is a professional special steel company, which specializing in this line in China since 2005. Our main products are Plastic Mould Steel, Hot Work Mould Steel, Cold Work Mould Steel, Alloy Structural Steel, Tool Steel, Stainless Steel, Carbon Steel and Forged Block.To ensure provide high quality products to customers, we have close cooperation with many Chinese first class special steel enterprises, including Baosteel Group, Dongbei Special Steel, Changcheng Special Steel, Hongsheng Heavy Industry, Xingcheng Special Steel and Daye Special Steel.


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