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    Nominal Composition Standard Inventory Specifications: Click Here To View The 718 Product Page On Our Website

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    Onder Temel
    Alloy 718 is a nickel-based superalloy used for applications requiring high strength up to 1400°F and oxidation resistance up to 1800°F. It has excellent tensile and impact strength even at cryogenic temperatures. High strength is developed through a precipitation heat treatment at 1325°F with cooling and holding at 1150°F, and the alloy can be repaired by welding even after heat treatment. The alloy composition includes nickel, chromium, molybdenum, and niobium.

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    Nominal Composition Standard Inventory Specifications: Click Here To View The 718 Product Page On Our Website

    Uploaded by

    Onder Temel
    26 views2 pages
    Alloy 718 is a nickel-based superalloy used for applications requiring high strength up to 1400°F and oxidation resistance up to 1800°F. It has excellent tensile and impact strength even at cryogenic temperatures. High strength is developed through a precipitation heat treatment at 1325°F with cooling and holding at 1150°F, and the alloy can be repaired by welding even after heat treatment. The alloy composition includes nickel, chromium, molybdenum, and niobium.

    Original Description:

    inconel 718

    Original Title

    718

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    Alloy 718 is a nickel-based superalloy used for applications requiring high strength up to 1400°F and oxidation resistance up to 1800°F. It has excellent tensile and impact strength even at cryogenic temperatures. High strength is developed through a precipitation heat treatment at 1325°F with cooling and holding at 1150°F, and the alloy can be repaired by welding even after heat treatment. The alloy composition includes nickel, chromium, molybdenum, and niobium.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    26 views2 pages

    Nominal Composition Standard Inventory Specifications: Click Here To View The 718 Product Page On Our Website

    Uploaded by

    Onder Temel
    Alloy 718 is a nickel-based superalloy used for applications requiring high strength up to 1400°F and oxidation resistance up to 1800°F. It has excellent tensile and impact strength even at cryogenic temperatures. High strength is developed through a precipitation heat treatment at 1325°F with cooling and holding at 1150°F, and the alloy can be repaired by welding even after heat treatment. The alloy composition includes nickel, chromium, molybdenum, and niobium.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
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    Alloy 718 is an austenitic nickel-base superalloy which is used in applications requiring high strength

    to approximately 1400°F (760°C) and oxidation resistance to approximately 1800°F (982°C). In addition, the
    alloy exhibits excellent tensile and impact strength even at cryogenic temperatures. High strength at room
    and elevated temperatures is developed by a precipitation heat treatment at 1325°F (718°C) with cooling
    and a hold of 1150°F (621°C). The relatively slow response to precipitation hardening permits repair welding
    of the alloy even in the aged condition. Click here to view the 718 Product Page on our website.

    Nominal Composition Standard Inventory Specifications

    C Carbon – 0.08%
    Mn Manganese – 0.35%
    P Phosphorous – 0.015%
    S Sulfur – 0.015%
    Si Silicon – 0.35%
    Cr Chromium – 17.00 – 21.00% Call 1.888.282.3292
    Ni Nickel – 50.00 – 55.00%
    Or click here to view
    Mo Molybdenum – 2.80 – 3.30%
    our product page
    Nb Columbium 4.75 – 5.50%
    and request a quote
    Ti Titanium – 0.65 – 1.15% on alloy 718
    Al Aluminum – 0.20 – 0.80%
    Co Cobalt – 1.00% Features Industry Applications
    • Excellent tensile and impact • Aircraft Turbines
    B Boron – 0.006%
    strength • Gas Turbines
    Cu Copper – 0.30% • Permits repair welding of the • Fasteners
    Ta Tantalum – 0.05% Type 718 Alloy even in the • Spacers
    aged condition
    Fe Iron – Balance • Generally supplied in the
    solution treated condition
    Percent by weight, maximum
    unless a range is listed.

    Resistance to Corrosion: Type 718 alloy has good resistance to oxidation and corrosion at temperatures in the alloy’s
    useful strength range in atmospheres encountered in jet engines and gas turbine operators.

    1.888.282.3292 | UPMET.COM
    Physical Properties

    Annealed Condition Aged Condition


    3 3
    Density 0.296 lb./in (8.19 g/cm ) 0.297 lb./in3 (8.22g/cm3)
    Specific Gravity 8.19 8.22

    Thermal Conductivity

    Temperature Range Coefficients


    °C °F W/m·K Btu/(hr/ft²/in/°F)
    0-100 32-212 6.5 11.2

    Electrical Resistivity

    Electrical Resistivity at 68°F (20°C)


    • 127 microhm-cm
    • Aged: 121 microhm-cm

    Mechanical Properties

    The room temperature strength of the Type 718 alloy is substantially increased by precipitation heat treatment
    as the following data indicate. These values are properties specified for sheet, strip and plate in AMS 5596 and
    AMS 5597.

    Yield Strength Ultimate Tensile Elongation (% in 2”)


    Max (0.2% Offset) Strength Max
    Sheet and Strip 80,000 psi (550 MPa) 14,000 (965 MPa) 30 (min) Btu/(hr/ft²/in/°F) 30 (min)
    Plate 105,000 psi (725 MPa) 150,000 (1,035 MPa) 3 30 (min)

    Solution Treated plus Precipitation Heat Treatment


    Yield Strength Min (0.2% Offset) °F Ultimate Tensile Strength Min Elongation (% in 2")
    Ultimate Tensile Strength Min
    150,000 (1,035 MPa) 180,000 (1,240 MPa) 12 (min)

    Typical Shot Time Tensile Properties as a Function of Temperature

    Solution Treatment: 1800°F (982°C) 1 hour


    Precipitation Treatment: 1325°F (718°C) 8 hours, Furnace Cool at 100°F (55°C) per hour to 1150°F (621°C) 8
    hours

    1.888.282.3292 | UPMET.COM

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