40CrNiMo hot rolled steel round bars

40CrNiMo hot rolled steel round bars

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40CrNiMoA steel is a Chinese alloy steel, has high strength, toughness and good hardenability, and has anti-overheating stability, but has high white point sensitivity, temper brittleness and poor weldability. Preheating is required before welding, and stress relief treatment is required after welding.

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  • Product Detail
  • | Technical Information
  • | Packaging
    • Commodity name: 40CrNiMo hot rolled steel round bars

    40CrNiMoA steel is a Chinese alloy steel, has high strength, toughness and good hardenability, and has anti-overheating stability, but has high white point sensitivity, temper brittleness and poor weldability. Preheating is required before welding, and stress relief treatment is required after welding.

    Product introduction

    40CrNiMoA steel is used after quenching and tempering, and is used to manufacture important parts requiring good plasticity, high strength and large size. For example, heavy-duty shafts in heavy-duty machines, steam turbine shafts with diameters greater than 250 mm, blades, transmissions, fasteners, crankshafts, gears, etc., can also be used for rotor shafts and blades operating at temperatures exceeding 400 °C.
    Chrome-Moly low alloy steel series contains 0.5% - 9% Cr and 0.5% - 1% Mo and lower than 0.20% carbon. 40CrNiMoA, 4340 and SNCM439 are the low alloy chromoly steel materials from the different standards.

    4340 and SNCM439 are standards from American and Japanese respectively. In most situation they can be alternative materials, unless there is a special note or used for special purpose. Their differences are mainly existed in chemical elements, details showed as follows:

     

    Standards

    GB

    AISI

    JIS

    Material

    40CrNiMoA

    4340

    SNCM439(SNCM8)

    C

    0.37~0.44

    0.38~0.43

    0.36~0.43

    Si

    0.17~0.37

    0.15~0.35

    0.15~0.35

    Mn

    0.50~0.80

    0.60~0.80

    0.60~0.90

    P

    ≤0.025

    ≤0.035

    ≤0.030

    S

    ≤0.025

    ≤0.040

    ≤0.030

    Cr

    0.60~0.90

    0.70~0.90

    0.60~1.00

    Ni

    1.25~1.65

    1.65~2.00

    1.60~2.00

    Mo

    0.15~0.25

    0.20~0.30

    0.15~0.30 


     

    Technical data

    40CrNiMoA Alloy Steel Mechanical Properties

    • Yield strength: ≥ 835 MPa
    • Tensile strength: ≥ 980 MPa
    • Elongation: ≥12%
    • Rate of reduction in area: ≥55%
    • Impact absorbing energy: ≥ 78 J
    • Material Brinell Hardness: ≤ 269 (Annealed or high temperature tempered steel rod)
    • Sample size: 25mm

    Heat treatment specification

    • First quenching heating temperature: 850 °C (Quenchant– oil)
    • Tempering heating temperature: 600 °C (Quenchant– water, oil)

    It was used where require high tensile and good wear-resistance property parts such as  heavy-duty axles, shafts, heavy-duty gears, spindles, pins, studs, bolts, couplings, sprockets, pinions, torsion bars, connecting rods. These high tensile alloy steel has been widely used in the areas such as petrol chemical industry, automotive, steam power equipment and other high temperature services.

  • Packaging

    The company's products are packaged and labeled according to regulations and customer requirements. Take care to avoid any damage that may occur during storage or transportation. In addition, clear labels are attached outside the package to facilitate identification of product ID and quality information.


    1. Wooden case packing, PVC packing, etc.

    2. Standard seaworthy packing machine customized

    3. Port any port in China

     

    In order to better ensure the safety of your goods, we will provide professional, environmentally friendly, convenient and efficient packaging services.

     

    Stainless steel pipes are often packed and transported in bags, boxes or protective containers. Stainless steel conduits with an outer diameter greater than 6 inches can be transported in bulk, packed or not. The length, outer diameter, wall thickness, finish and transportation method determine the optimal packaging method. Most polishing tubes are packed in wooden cases or boxes made of other suitable materials.

     

    It is necessary to bundle stainless steel pipes, because excessive quantities of stainless steel pipes during transportation may lead to risks such as bending, extrusion deformation or twisting of pipes during transportation. In addition, some other auxiliary measures need to be taken during baling. Flat steel wire belt is generally used for binding, but other suitable materials can also be used. The number of fixed knots depends on the length and weight of the bale.

     

     

     

  • Application

    1 Building Materials industry 
    2 light industry 
    3 Shipbuilding Industry 
    4 Mechanical Manufacturing 
    5 Bridge Construction 
    6 Energy Engineering 
    7 Water Conservancy Projects 
    8 Chemical Industry

    1. Automobile industry

    Stainless steel plate not only has high corrosion resistance, but also has light weight, which is very important in automobile manufacturing. A large number of stainless steel plates are required for the manufacturing of automobile shells, and many international famous cars are now beginning to use stainless steel plates as the structural materials of automobiles. Even in high-speed railway, subway and other aspects, stainless steel plate is also widely used.

    2. Water storage and transportation

    Water has high requirements on the environment during storage. Stainless steel plate can effectively ensure the water quality is not polluted when used for water storage. Stainless steel plate is also recognized as a safe, hygienic and efficient water storage material in the world. Stainless steel plate will also be an indispensable material for water storage equipment in the future.

    3. Construction industry

    In fact, stainless steel plates were first used in the construction industry, and then gradually introduced into more fields. Decorative panels on the exterior walls of buildings are generally made of stainless steel plates, which are durable and beautiful.

    In a word, stainless steel plates are widely used. In addition to the above, stainless steel plates can also be seen in the household appliance manufacturing industry. I hope you can have a more comprehensive understanding of stainless steel plate after reading this article. More wonderful content, remember to pay attention to TISCO stainless steel!


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