11 Years Manufacturer L6 Tool Steel | 1.2714 | 55NiCrMoV7 | SKT4 | BH224/5 in Kazakhstan

11 Years Manufacturer
 L6 Tool Steel | 1.2714 | 55NiCrMoV7 | SKT4 | BH224/5 in Kazakhstan

Short Description:

In ASTM A681 standard, L6 steel grade is in L-type for special purpose tool steels. AISI L6 tool steel is in the general class of alloy, oil-hardening tool steel that is characterized by good toughness. ASTM L6 tool steel is suitable for use as tools, dies, and machine parts, which require a good combination of hardness and toughness. Due to its lower carbon content and relatively high nickel content, L6 tool steel has slightly better shock-resistance than more highly alloyed types and shoul...


  • 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

    With a positive and progressive attitude to customer's interest, our company continuously improves our product quality to meet the needs of customers and further focuses on safety, reliability, environmental requirements, and innovation of
    11 Years Manufacturer L6 Tool Steel | 1.2714 | 55NiCrMoV7 | SKT4 | BH224/5 in Kazakhstan, 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.


    In ASTM A681 standard, L6 steel grade is in L-type for special purpose tool steels. AISI L6 tool steel
    is in the general class of alloy, oil-hardening tool steel that is
    characterized by good toughness. ASTM L6 tool steel is suitable for use
    as tools, dies, and machine parts, which require a good combination of
    hardness and toughness.

    Due to its lower carbon content and
    relatively high nickel content, L6 tool steel has slightly better
    shock-resistance than more highly alloyed types and should be used where
    some wear-resistance can be sacrificed for increased toughness.

    1. Relevant Steel Specification of L6 Tool Steel

    Country USA German Japan British
    Standard ASTM A681 DIN EN ISO 4957 JIS G4404 BS 4659
    Grades L6/T61206 1.2714/55NiCrMoV7 SKT4 BH224/5

    2. AISI L6 Steel Chemical Composition and Steel Equivalents

    ASTM A681 C Mn P S Si Cr V Mo Ni
    L6/T61206 0.65 0.75 0.25 0.80 0.03 0.03 0.10 0.50 0.60 1.20 . . . . . . . . . 0.50 1.25 2.00
    DIN ISO 4957 C Mn P S Si Cr V Mo Ni
    1.2714/55NiCrMoV7 0.50 0.60 0.60 0.90 0.03 0.02 0.10 0.40 0.80 1.20 0.05 0.15 0.35 0.55 1.50 1.80
    JIS G4404 C Mn P S Si Cr V Mo Ni
    SKT4 0.50 0.60 0.60 0.90 0.03 0.02 0.10 0.40 0.80 1.20 0.05 0.15 0.35 0.55 1.50 1.80
    BS 4659 C Mn P S Si Cr V Mo Ni
    BH224/5 0.49 0.57 0.70 1.00 0.03 0.025 . . . 0.35 0.70 1.10 . . . . . . 0.25 0.40 1.25 1.80

    3. ASTM L6 Tool Steel Mechanical Properties

    Steel L6 Physical Properties

    • Modulus of elasticity [103 x N/mm2]: 215

    • Density [g/cm3]: 7.84

    • Thermal conductivity [W/m.K]: 36.0

    • Electric resistivity [Ohm mm2/m]: 0.30

    • Specific heat capacity[J/g.K]: 0.46

    Mechanical Properties of L6 Steels

    Properties Metric Imperial
    Poisson’s ratio 0.27- 0.30 0.27- 0.30
    Elastic modulus 190-210 GPa 27557-30457 ksi

    4. Forging of L6 Tool Steel

    Forge at 1079°C (1975 F) down to 871°C (1600 F). Do not forge below 843°C (1550 F).

    5. AISI L6 Tool Steel Heat Treatment

    Hardening

    Preheating:
    Heat steel L6 at a rate not exceeding 204°C (400°F) per hour (222°C per
    hour) to 621-677°C (1150-1250°F) and equalize. Soak for 30 minutes for
    the first inch (25.4 mm) of thickness, plus 15 minutes for each
    additional inch (25.4 mm).

    Quenching

    Quench L6 tool steel in oil to 66-51°C (150-125°F).

    Tempering

    Temper
    L6 steels immediately after quenching. Hold at temperature for 1 hour
    per inch (25.4 mm) of thickness when tempering at 204°C (400°F), 4 hours
    minimum, then air cool to ambient temperature.
    However, where increased toughness is desired, at a sacrifice of some hardness, higher tempering temperatures are often used.

    AISI L6 steel does not become brittle, as many other die steels do, when tempered in the range of 232°C to 426°C (450 to 800°F).

    To
    minimize the possibility of cracking, the steel should be tempered
    immediately after hardening and should be heated slowly to the desired
    tempering temperature.

    Annealing

    Annealing of steel L6 must be performed after hot working and before re-hardening.

    Heat
    to 760°C (1400°F) and hold one hour per inch of maximum thickness. Then
    cool slowly with the furnace at a rate not exceeding 28°C per hour(50°F
    per hour) to 538°C (1000°F). Continue cooling to ambient temperature in
    the furnace or in air.

    For improved machinability, hold at 760°C
    (1400°F) for 1 hour per inch (25.4mm) of maximum thickness; 2 hours
    minimum. Then cool slowly with the furnace cool from 677°C (1250°F) to
    760°C (1400°F), hold for 8 hours, then air cool to ambient temperature.

    Because of its air-hardening ability, steel L6 should not be normalized.

    6. Machinability of Steel L6

    Machinability
    of tool steel L6 is very good. It rates 90% of the machinability of the
    W-group water hardening low alloy steels rated 100% as a baseline.

    7. Applications of ASTM A681 L6 Tool Steel

    AISI
    L6 cold working tool steel is for general purpose tools and dies where
    greater toughness is required, but with some sacrifice of
    abrasion-resistance.

    Typically used below applications:

    • spindles,

    • forming rolls,

    • punches,

    • blanking and forming dies,

    • trimmer dies,

    • clutch parts,

    • pawls,

    • bearings,

    • chucks parts,

    • rollers,

    • knuckle pins,

    • clutch pins,

    • shear blades

  • Previous:
  • Next:



  • 9-11 revisited. A very short look at the strange case of the Flight Data Recorders (Black Boxes) from Flight 175 and from Flight 11.

    During the Ground-Zero cleanup meticulous care was given to finding human remains, sometimes as small as a fingernail. Workers would sift through debris spread out by heavy equipment to ensure that as many victims could be identified as possible.
    It is very surprising, therefore, to be told that four virtually indestructible relatively large bright orange steel boxes – the Flight Data Recorders and Cockpit Voice Recorders – from what was claimed to have been Flight 175 and Flight 11 were never found……or were they?

    Very interesting – and possibly very telling – is CBS News anchor Dan Rather’s odd reaction after he announced on his CBS news report, a recently acquired video clip that was said to show NY Governor Rudy Giuliani holding up one of the aircraft’s Flight Data Recorders recovered from ground-zero. What appears to be his odd reaction occurs when he suddenly must announce that the video is not of a recovered Flight Data Recorder, but is instead merely of Governor Giuliani holding a “picture” of a Flight Data Recorder.

    In light of the events following the attack on the World Trade Center, such as real-time on-air news reports of Building-7′s destruction while at the same time Building-7 can be seen standing behind the reporters, collapsing on-air moments later, his apparently excessive and extensive apologetic comments about the claimed mix-up regarding the Flight Data Recorder seem suspicious, to say the least.

    https://www.youtube.com/watch?v=pfecdtQXSPk – 9/11 – Is PNAC Creating the “Violent” New World Order? [includes a portion of the BBC documentary "Panorama - The War Party" on the Neoconservatives plan for America in their own words]

    https://www.youtube.com/watch?v=3JK1zTuBTZI – “9/11 – Did Flight 77 Really Crash into The Pentagon? – 3 Conflicting Official Animations”

    http://www.youtube.com/watch?v=BUquZrZBddA [9/11's Massive Evidence - Why Some People Are Still In Denial]

    The documentary Donald Trump suppressed –
    Teaser – http://trumpthemovie.com/watch/
    Full length – https://www.youtube.com/watch?v=jkUFUkvNYAQ
    [ http://www.weeklystandard.com/trump-the-documentary/article/1002392 ]
    https://www.youtube.com/watch?v=x8095BqQsVU&t=6s – ART OF DECEPTION – Pseudo of the United States



    Science and Technology of Polymers by Prof. B. Adhikari,Department of Metallurgy and Material Science,IIT Kharagpur.For more details on NPTEL visit http://nptel.ac.in

    Send your message to us:

    INQUIRY NOW
    • * CAPTCHA: Please select the Tree

    Related Products

    INQUIRY NOW
    • * CAPTCHA: Please select the Heart