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Alloy L-605

  • Material

    AlloyL-605, Alloy 25, UNS R30605, W.Nr. 2.4964, GH605, GH5605

  • Overview

    Alloy L-605 is a cobalt-nickel- chromium-tungsten alloy that combines excellent high-temperature strength with good resistance to oxidizing environments up to 1800°F (980°C) for prolonged exposures, excellent resistance to sulfidation, andexcellent resistance to metal galling. It can be fabricated and formed by conventional techniques, and has been used for cast components.

  • Application

    Alloy L-605 combines properties which make it suitable for a number of component applications in the aerospace industry, including parts in established military and commercial gas turbine engines. In modern engines, it has largely been replaced by newer materials such asUNS R30188, and UNS N06230, etc, which possess improved properties. Another area of significant usage forthis alloy is as a bearing material, for both balls and races.

  • Chemical Composition (wt%)

    Material

    Fe

    Ni

    Co

    Cr

    W

    C

    Alloy L-605

    ≤3.0

    9.0-11.0

    Balance

    19.0-21.0

    14.0-16.0

     0.05-0.15

    Material

    Mn

    Si

    P

    S

    Mo

     

    Alloy L-605

    1.0-2.0

    ≤0.40

    ≤0.040

    ≤0.030

    ≤1.0


  • Mechanical Property

    (at room termperature in solution annealed condition)

    Material

    Tensile strength

    MPa

    Yield strength at

    0.2 offset MPa

    Elongation in 2”

    % min.

    Reduction of area

    % min.

    Alloy L-605

    ≥860

    ≥310

    ≥30


  • Corrosion Resistance

    Aqueous corrosion resistance

    Alloy L-605 was not designed for resistance to corrosive aqueous media. For applications requiring corrosion resistance in aqueous environments,R31233alloy andother corrosion-resistant alloys should be considered.

     

    Oxidation resistance

    Alloy L-605 exhibits good resistance to both air and combustion gas oxidizing environments, and can be used for long-term continuous exposure at temperatures up to 1800°F (980°C). For exposures of short duration,Alloy L-605 can be used at higher temperatures. Applications for which oxidation resistance is a serious consideration normally call for newer, more capable materials such asN06230 alloy orR30188 alloy. This is particularly important at temperatures above 1800°F (980°C).

     

    Sulfidation resistance

    Alloy L-605 has very good resistance to gaseous sulfidation environments encountered in various industrial applications.

  • Available Process

    (1) Hot formed, solution annealed, descaled

    (2) Cold worked and bright annealed

    (3) Cold worked, bright annealed, polished (MP, EP etc.)

  • Common Tests

    Chemical composition

    Tension

    Hardness

    Flaring

    Flange

    Flattening

    Micro structure

    Hydrostatic

    NDT

    Intergranular Corrosion

    Surface condition

    Shape and dimension

    Positive Material Identification

  • Product Forms

    Form

    Size range

    Capillary tube

    OD 0.08 ~ 6.0 mm

    WT 0.015 ~ 1.5 mm

    Thin wall & Ultra thin wall seamless tube

    OD6.0 ~80.0 mm

    WT 0.05 ~4.5 mm

    Micro ID and heavy thick wall seamless tube

    OD3.0 ~50.0 mm

    ID 0.30 ~5.0 mm

    Precision conic seamless tube

    Bigger end: OD3.0 - 426.0mm

    Smaller end: OD2.5 - 346.0mm

    WT: 0.15 - 40.0mm

    HP /UHP BA+ tube

    EP tube

    OD 1.0 ~ 76 mm

    WT 0.10 ~ 10.0 mm

    Small caliber precision seamless tube

    OD6.0 ~89 mm

    WT 0.50 ~9.0 mm

    Profiled seamless tube

    Build to drawing

    Build to specification

    Bourdon tube

    Y40, Y50, Y60, Y70, Y100, Y150

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