Cheap price AISI 4340 Steel | 36CrNiMo4 | 1.6511 | EN24 | 817M40 | SNCM439 Factory from Mauritius

Cheap price
 AISI 4340 Steel | 36CrNiMo4 | 1.6511 | EN24 | 817M40 | SNCM439 Factory from Mauritius

Short Description:

AISI 4340 steel is a medium carbon, low alloy steel known for its toughness andstrength in relatively large sections. AISI 4340 is also one kind ofnickel chromium molybdenum steels. 4340 alloy steel is generallysupplied 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 goodshock and impact resistance as well as wear and abrasion resistanc...


  • 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
  • Product Detail

    Product Tags

    We are ready to share our knowledge of marketing worldwide and recommend you suitable products at most competitive prices. So Profi Tools offer you best value of money and we are ready to develop together with Cheap price AISI 4340 Steel | 36CrNiMo4 | 1.6511 | EN24 | 817M40 | SNCM439 Factory from Mauritius, We encourage you to make contact as we are looking for partners in our venture. We are sure you will find doing business with us not only fruitful but also profitable. We are ready to serve you with what you require.


    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.

    Due to availability the ASTM 4340 grade steel is often substituted
    with European based standards 817M40/EN24 and 1.6511/36CrNiMo4 or Japan
    based SNCM439 steel. You have the detailed data of 4340 steel below.

    1. AISI 4340 Steel Specification and Relevant Standards

    Country USA Britain Britain Japan
    Standard ASTM A29 EN 10250 BS 970 JIS G4103
    Grades 4340 36CrNiMo4/
    1.6511
    EN24/817M40 SNCM 439/SNCM8

    2. ASTM 4340 Steels And Equilvalents Chemical Composition

    Standard Grade C Mn P S Si Ni Cr Mo
    ASTM A29 4340 0.38-0.43 0.60-0.80 0.035 0.040 0.15-0.35 1.65-2.00 0.70-0.90 0.20-0.30
    EN 10250 36CrNiMo4/
    1.6511
    0.32-0.40 0.50-0.80 0.035 0.035 ≦0.40 0.90-1.20 0.90-1.2 0.15-0.30
    BS 970 EN24/817M40 0.36-0.44 0.45-0.70 0.035 0.040 0.1-0.40 1.00-1.40 0.20-0.35
    JIS G4103 SNCM 439/SNCM8 0.36-0.43 0.60-0.90 0.030 0.030 0.15-0.35 1.60-2.00 0.60-1.00 0.15-0.30

    3. AISI Alloy 4140 Steel Mechanical Properties

    Mechannical Properties

    (Heat Treated Condition )

    Condition Ruling section
    mm
    Tensile Strength MPa Yield Strength
    MPa
    Elong.
    %
    Izod Impact
    J
    Brinell
    Hardness
    T 250 850-1000 635 13 40 248-302
    T 150 850-1000 665 13 54 248-302
    U 100 930-1080 740 12 47 269-331
    V 63 1000-1150 835 12 47 293-352
    W 30 1080-1230 925 11 41 311-375
    X 30 1150-1300 1005 10 34 341-401
    Y 30 1230-1380 1080 10 24 363-429
    Z 30 1555- 1125 5 10 444-

    Thermal Properties

    Properties Metric Imperial
    Thermal expansion co-efficient (20°C/68°F, specimen oil hardened, 600°C (1110°F) temper 12.3 µm/m°C 6.83 µin/in°F
    Thermal conductivity (typical steel) 44.5 W/mK 309 BTU in/hr.ft².°F

    4. Forging of 4340 Alloy Steel

    Preheat
    the steel 4340 first, heat up to 1150°C – 1200°C maximum for forging,
    hold until temperature is uniform throughout the section.

    Do not forge
    below 850 °C. 4340 has good forging characteristics but care must be
    taken when cooling as the steel shows susceptibility to cracking.
    Following forging operation the work piece should be cooled as slowly as
    possible. And cooling in in sand or dry lime is recommended etc.

    5. AISI 4340 Steel Grade Heat Treatment

    • Stress Relieving

    For
    pre-hardened steel stress relieving is achieved by heating steel 4340
    to between 500 to 550°C. Heat to 600 °C – 650 °C, hold until temperature
    is uniform throughout the section, soak for 1 hour per 25 mm section,
    and cool in still air.

    • Annealing

    A
    full anneal may be done at 844°C (1550 F) followed by controlled
    (furnace) cooling at a rate not faster than 10°C (50 F) per hour down to
    315°C (600 F). From 315°C 600 F it may be air cooled.

    • Tempering

    AISI
    4340 alloy steel should be in the heat treated or normalized and heat
    treated condition before tempering. The tempering temperature for
    depends upon the strength level desired. For strength levels in the 260 –
    280 ksi range temper at 232°C (450 F). For strength in the 125 – 200
    ksi range temper at 510°C (950 F). And don’t temper the 4340 steels if
    it is in the 220 – 260 ksi strength range as tempering can result in
    degradation of impact resistance for this level of strength.

    Tempering should be avoided if possible within the range 250 °C – 450 °C due to temper brittleness.

    • Flame or Induction Hardening

    As mentioned above, pre-hardened and tempered 4340 steel bars or plates can be further surface hardened by either the flame or induction hardening
    methods resulting in a case hardness in excess of Rc 50. AISI 4340
    steel parts should be heated as quickly as possible to the austenitic
    temperature range (830 °C – 860 °C) and required case depth followed by
    an immediate oil or water quenching, depending upon hardness required,
    workpiece size/shape and quenching arrangements.

    Following
    quenching to hand warm, tempering at 150°C – 200°C will reduce stresses
    in the case with minimal effect on its hardness.

    All de-carburised surface material must first be removed to ensure best results.

    • Nitriding

    Hardened
    and tempered 4340 alloy steel can also be nitrided, giving a surface
    hardness of up to Rc 60. Heat to 500°C – 530°C and hold for sufficient
    time (from 10 to 60 hours) to develop the depth of case. Nitriding
    should be followed by slow cooling (no quench) reducing the problem of
    distortion. The nitrided grade 4340 materials can therefore be machined
    to near final size, leaving a small grinding allowance only. The tensile
    strength of the 4340 steel material core is usually not affected since
    the nitriding temperature range is generally below the original
    tempering temperature employed.

    Surface hardness achievable is 600 to 650HV.

    6. Machinability

    Machining
    is best done with the alloy steel 4340 in the annealed or normalized
    and tempered condition. It can be readily machined by all conventional
    methods such as sawing, turning, drilling etc. However in the high
    strength conditions of 200 ksi or greater the machinability is only from
    25% to 10% that of the alloy in the annealed condition.

    7. Welding

    Welding
    of steel 4340 in the hardened and tempered condition (as normally
    supplied), is not recommended and should be avoided if at all possible,
    because of the danger of quench cracking, as the mechanical properties
    will be altered within the weld heat affected zone.

    If welding
    must be carried out, pre-heat to 200 to 300°C and maintain this while
    welding. Immediately after welding stress relieve at 550 to 650°C, prior
    to hardening and tempering.

    If welding in the hardened and
    tempered condition is really necessary, then the work piece, immediately
    on cooling to hand warm, should be if possible stress relieved at 15 °C
    below the original tempering temperature.

    8. Application of 4340 Steel

    AISI
    4340 steel is used in most industry sectors for applications requiring
    higher tensile/yield strength than 4140 steel can provide.

    Some typical applications such as:

    • Aircraft Landing Gear

    • Automotive,

    • Oil and Gas Drilling,

    • Forging,

    • Warm and Cold Forming,

    • Machine Building,

    • Transfer Systems, like power transmission gears and shafts.

    • General
      engineering industries and structural use applications, such as: heavy
      duty shafts, gears, axles, spindles, couplings, pins, chucks, molds etc.

  • Previous:
  • Next:



  • Ed Tarney, customer technical support manager with Erasteel Inc., Baldwinsville, N.Y., addressed “PM & High-Speed Steel for Premium Tool Performance” as part of the Fast Track Seminar series hosted at the Cutting Tool Engineering booth during IMTS 2010. Presented here is part two of a two-part presentation.



    Aluminum Prices Artesia http://smartrecycling.com/scrap-metal-recycling-los-angeles/

    We deliver the greatest spectrum of scrap metal recycling services and collection storage containers for recyclables in the Artesia area. From special equipment for reclamation, disassembly or collection, to identifying the aftermarket most beneficial to you, Smart Recycling’s professional expertise and flexibility is second to none.
    Smart Recycling, Inc.’s comprehensive experience in the metals industry enables us to obtain incredibly competitive prices for your metals:
    Fixed Brokerage Sales – Let Smart Recycling, Inc. broker your materials to gain the greatest possible profit.
    Post Reclamation Salvage – Our capacity to optimize sales of your goods is second to none.
    Direct Supplier to Foundries and Mills – Removing the middle-man makes it possible for us to pay “top-dollar” to our clientele.
    We maintain a steel shredder at our center – Our investment in capital equipment puts extra cash in your pocket.

    ==========================
    Aluminum Prices Artesia

    In 2010, U.S. nonferrous scrap healing consisted of:

    Aluminum Recycling

    Getting to identify the major kinds of scrap steel is a vital step in coming to be an effective scrap metal vendor.

    With a healing of 4.6 million statistics bunches every year in the U.S, much more aluminum is reused than any kind of various other nonferrous steels. Aluminum is light and also normally easy to flex. It will not provide off triggers on a grinding wheel, as well as is nonmagnetic, unlike in a similar way colored metals such as steel. Although aluminum can be found in different qualities, it is hard to determine between them.

    Aluminum Prices Artesia

    Just like any kind of metal, much less contamination enhances the worth, such as disassembling devices to divide various types of steel, or eliminating various other contaminants such as encasement with concrete or various other product. Webbing as well as screws ought to be gotten rid of from patio chair. Look for light weight aluminum scrap in housing as well as demolition jobs, consisting of door as well as home window frames, rain gutters, home siding, as well as wire. In automobile stores, aluminum could be found in transmission housings and pistons.

    Copper Recycling

    Copper is the 3rd most commonly recycled nonferrous steel. As a matter of fact, over 80% of copper ever before generated still exists. It is easy to recognize due to its distinct colour, as well as that it is nonmagnetic. When positioned against a grinding wheel, copper will certainly not stimulate.

    Stainless Steel Recycling

    Stainless steel is the second most commonly recycled nonferrous steel. It inclusives steel alloys which contains a minimal proportion of chromium. Another metal typically made use of as an alloy in stainless steel is nickel. Unlike various other nonferrous steels, stainless steel could be magnetic, depending upon nickel content. Extra nickel lowers the magnetic residential or commercial properties of the stainless steel. Stainless-steel will certainly stimulate in feedback to a grinding wheel.

    Brass Recycling

    Brass is an alloy of copper and also zinc, along with tiny amounts of various other steels consisting of manganese, tin, iron or light weight aluminum. The shade series of brass consists of red, yellow, silver and gold. In terms of magnetic destination, it can reveal from nonmagnetic to a little magnetic. On the grinding wheel it will certainly vary between no stimulating to brief red triggers.

    Aluminum Prices Artesia

    https://www.youtube.com/watch?v=HWqYJY1jNmo

    Send your message to us:

    INQUIRY NOW
    • * CAPTCHA: Please select the Flag

    Related Products

    INQUIRY NOW
    • * CAPTCHA: Please select the Key