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Alloy 41

  • Material

    Alloy 41,UNS N07041, AISI 683,Rene 41, W.Nr. 2.4973,GH4141

    Note:Rene 41is trade mark ofGeneral Electric Inc.

  • Overview

    Alloy41 has exceptionally high strength at temperatures in the range of 1200 to 1800°F (649 to 982°C). The alloy is a precipitation-hardening type and strength is developed by various solution annealing and aging heat treatments. In the annealed condition, the alloy is ductile and has essentially the same forming characteristics as 18-8 stainless steel and other nickel-based alloys. It is stronger, however, and has a greater resistance to forming. The alloy has been formed with success on drop hammers, expanding mandrels and stretch former.

  • Application

    Because of its high strength and good oxidation resistance, the alloy is being used in jet engine, gas turbine engine and high speed airframe components such as afterburner parts, turbine casings, wheels, buckets, bolts, fasteners and nozzle diaphragm partitions.

  • Chemical Composition (wt%)

    Fe

    Ni

    Co

    Cr

    Mo

    Ti

    Zr

    B

    Bi

    ≤5.0

    Balanced

    10.0-12.0

    18.020.0

    9.00-10.50

    3.00-3.30

    ≤0.070

    0.003-0.010

    ≤0.00003

    Cu

    C

    Al

    Mn

    Si

    P

    S

    Pb

    Se

    ≤0.50

    ≤0.12

    1.40-1.80

    ≤0.10

    ≤0.50

    ≤0.015

    ≤0.015

    ≤0.0005

    ≤0.0003

  • Mechanical Property

    Tensile strength

    ksi (MPa) min.

    Yield strength at

    0.2 offset ksi (MPa) min.

    Elongation at fracture min.

    Reduction of Area min.

    170 (1172)

    130 (896)

    20%

    10%

  • Workability

    Hot Working

    Alloy41 is best forged between an initial furnace temperature of 2100℉ (1149℃) and an optical finishing temperature of 1850/1900℉ (1010/1038℃).

     

    Cold Working

    Alloy 41 work hardens rapidly; frequent anneals will be required. Aging after cold working can be result in strain age cracking. Cold worked sections must be heated rapidly through the aging temperature range, 1200/1700℉ (649/927℃), to the solution or annealing temperature to prevent strain age cracking. A sizable amount of cold reduction between anneals is mandatory. Small reductions, such as sizing passes, must be avoided.

  • Available Process

    (1) Hot formed, solution annealed, descaled

    (2) Cold worked and bright annealed

    (3) Cold worked, annealed and descaled

    (4) Cold worked, polished (MP, EP etc.)

    (5) 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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