28 Years Factory BS EN 42CrMo4 | 1.7225 Alloy Engineering Steel Denver

28 Years Factory
 BS EN 42CrMo4 | 1.7225 Alloy Engineering Steel Denver

Short Description:

BS EN 42crmo4 Alloy Steel is a common chromium-molybdenum steel that usually used after quenchedand tempered, with high intensity, high hardenability. BS EN 42CrMo4round steel has better performance than 34CrMo4 steel due to the carbonand chromium content is higher. 42CrMo4 alloy steel has higher strength and hardenability. The 42CrMo4 alloy material alsohas high fatigue strength and good low-temperature impact toughness. The temper brittleness is not obvious. Although 42CrMo4 steel is mo...


  • Length: 3-5.8mm or Customization
  • Surface: black, peeled, or rough turned
  • Heat treatment: air-cooling, normalized, annealed, Q&T
  • Smelting process: EAF+LF+VD
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    Our products are widely recognized and trusted by users and can meet continuously changing economic and social needs of 28 Years Factory BS EN 42CrMo4 | 1.7225 Alloy Engineering Steel Denver, We sincerely welcome overseas customers to consult for the long-term cooperation and the mutual development.We strongly believe that we can do better and better.


    BS EN 42crmo4 Alloy Steel

    is a common chromium-molybdenum steel that usually used after quenched
    and tempered, with high intensity, high hardenability. BS EN 42CrMo4
    round steel has better performance than 34CrMo4 steel due to the carbon
    and chromium content is higher. 42CrMo4 alloy steel

    has higher strength and hardenability. The 42CrMo4 alloy material also
    has high fatigue strength and good low-temperature impact toughness. The

    temper brittleness is not obvious.

    Although 42CrMo4 steel is more expensive than 41Cr4 steel, it is more

    preferable in terms of material properties. EN 42CrMo4 alloy
    engineering steel materials have been widely used in automotive driving
    elements. Otai Steel is able to supply you prime quality of 42CrMo4
    alloy steel materials with wide range.

    1.42CrMo4 Alloy Steel Supply Range

    42CrMo4 Round bar Sizes: 80mm – 1200mm
    Steel 42CrMo4 Flat and Plate: 10mm-1500mm thickness x 200-3000mm width
    Other steel shape and sizes available according to your requirements.

    Surface condition: Black, rough machined, peeled, turned or other requirements according to your requirements.

    2.BS EN 42CrMo4 Alloy Steel Relevant Specifications and Equivalents

    BS EN 10250 Material No. DIN ASTM A29 JIS G4105 BS 970-3-1991 BS 970-1955 AS 1444 AFNOR
    42CrMo4 1.7225 38HM 4140 SCM440 708M40 EN19A 4140 42CD4

    3.42CrMo4 Alloy Steel Chemical Composition

    42CrMo4/1.7225 C Mn Si P S Cr Mo
    0.38-0.45 0.60-0.90 0.40 max 0.035 max 0.035 max 0.90-1.20 0.15-0.30

    4. DIN 42CrMo4 Alloy Steel Mechanical Properties

    Size Ø mm Yield stress
    Rp0.2,N/nn2, min.
    Ultimate tensile Stress,
    Rm,N/nn2
    Elongation
    A5,%, min.
    Hardness HB Toughness
    KV, Joule, min.
    <40 750 1000-1200 11 295-355 35 at 20ºC
    40-95 650 900-1100 12 265-325 35 at 20ºC
    >95 550 800-950 13 235-295 35 at 20ºC

    5. Heat Treatment of 42CrMo4 Steels

    Annealing of 42CrMo4 Steels

    • Heat steel 42CrMo4 forged steel slowly and thoroughly to 800-850°C;

    • Cool slowly in the furnace to the temperature 480°;

    • Complete annealing the steel in the air.

    Quenched and Tempered (Q+T)

    • Heat 42CrMo4 steel slowly to 880°C;

    • Soak at this temperature then quench in oil;

    • Temper as soon as 42CrMo4 steel reach room temperature (20°C);

    • Heat uniformly to the suitable temperature of 560°C;

    • Withdraw the 42CrMo4 material from the furnace and cool in the air.

    6. Forging of 42CrMo4 Alloy Steel

    • Preheat 42CrMo4 engineering steel uniformly and slowly;

    • Increase the forging temperature up to 1150-1200°C.

    • Always keep the forging temperature above at least 850°C

    7.Weldability

    Engineering

    steel 42CrMo4 has only limited weldability. Preheating to 200-300°C is
    strongly recommended; the upper limit should not be exceeded because of
    risk for deterioration of the chrome layer.

    Alloy steel 42CrMo4
    can be friction welded. However, precautions are necessary so as to
    limit the formation of undesirable microstructures in the welded zone.

    8.Application of 42CrMo4 Alloy Steels

    EN

    42CrMo4 alloy steel is widely used for engineering steel purpose, such
    as: making various kinds of machinery, automobile, mining spare part,
    the gearwheel of the engine, the driving gear of supercharger, the
    connecting rob, the pinchock under the high pressure, parts for power
    train applications, cold formed fastener components, shafts, gears,
    drill collars for the oil exploration, etc.

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  • Forged bars-Sorel Forge

    http://www.sorelforge.com/en/forged-steel-bars.aspx

    Forging is the process of shaping metal using extreme forces. The standard mode of classification of forged metals is by the heat at which they were manipulated: cold, warm or hot. Hot forging is normally performed at about 1200 degrees, warm forging at 650-700 degrees centigrade and cold forging at room temperature.

    Forging dates back to the 12th century, when hammers and anvils were used to shape metals for various purposes. Nowadays, industrial presses or hammers are the main tools, powered by compressed air, electricity, steam or hydraulics. Forging has the ability to create bars that are better than those machined or from cast steel. During the forging process, the grain of the metal is shifted to follow the contours of the shape of the steel. This can lead to improved strength characteristics and reduced brittleness.

    Sorel Forge produces forged bars sizes from 10 inches (255 mm) up to 36 inches (915 mm) in diameter in carbon and medium alloy steel grades.

    There are many types of forged steel bars. Some of the most common types are Carbon and Alloy Steel Hot Forged Bars, Cold Rolled Bright Bars and Carbon and Alloy Steel Hot Rolled Round Bars. The grade of manufacture is dictated by the cost and the application of the bars. Common grades of steel used include but are not limited to; 1045, 1018, 1020, 1030, 1035, 1070, 4130, 4140, 4145, 4150, 4320, 4330, 4330, 4340, 8620, 8630, 9310, A182F22, A350LF2, H13, SS410 etc . (PER AISI, SAE, ASTM A688, ASTM A322 and ASTM A182 as example).

    The quality of forged steel is described in terms of surface quality, internal quality, a uniform and fine austenitic grain size, good response to heat treatment, good toughness on impact and cleanliness. Normally, forged steel products require some finishing and the forging process is the first step in a two or more step process.

    Forged steel parts vary in size from less than a kilogram to over 500 metric tonnes. Huge steel bars are used a great deal in the oil and energy exploration sector where they need to be resistant to extreme forces.

    Other applications of forged steel bars are for steel plants, dam gates and crane manufacture, cable machine manufacture, hydraulic press manufacture, shafts and axles for drives in diverse industries, and the car manufacture industry. In many sectors, steel bars have become indispensable to standard operational processes.

    Sorel Forge adheres to strict quality control processes and we carry out a battery of regular tests on all our forged steel bars.



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