20% OFF Price For L6 Tool Steel | 1.2714 | 55NiCrMoV7 | SKT4 | BH224/5 Wholesale to Ecuador

20% OFF Price For
 L6 Tool Steel | 1.2714 | 55NiCrMoV7 | SKT4 | BH224/5 Wholesale to Ecuador

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
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    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

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  • On behalf of all employees of Ningbo Powerway Alloy Material Co., Ltd, I give sincere greetings and heartfelt thanks to customers from domestic and oversea , leaders of all levels and people from all circles, who have given their attention and support to the development of Powerway Alloy! Ningbo Powerway Alloy Materials Co., Ltd is the core enterprise of Powerway Group, Powerway Group is the first national recognition of the innovative enterprise, is the national postdoctoral workstation, countries that enterprise technology center and the national accredited laboratory, the company fully inherited the Powerway Group ‘s research and development strength, is the national key high-tech enterprise, is the International Wrought Copper Council (IWCC) director unit, is also IWCC technical committee. January 27, 2011, the company in Shanghai stock exchange main board listing (stock referred to as: powerway alloy, stock code: 601137).

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    Listening to Music (MUSI 112)

    This lecture explores the basic nature of melody. Touching on historical periods ranging from ancient Greece to the present day, Professor Wright draws examples from musical worlds as disparate as nineteenth-century Europe and twentieth-century India, China, and America. Professor Wright puts forth a historical, technical, and holistic approach to understanding the way pitches and scales work in music. He concludes his lecture by bringing pitch and rhythm together in a discussion of Beethoven’s Ninth Symphony.

    00:00 – Chapter 1. The Nature of Melody
    02:37 – Chapter 2. The Development of Notes and the Scale
    14:43 – Chapter 3. Major, Minor, and Chromatic Scales in World Music
    33:03 – Chapter 4. Pitch and Rhythm in Beethoven’s Ninth Symphony

    Complete course materials are available at the Yale Online website: online.yale.edu

    This course was recorded in Fall 2008.

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