UNS N07263 ( Nimonic 263 Haynes 263 )

Short Introduction:

  • UNS N07263 ( Nimonic 263 Haynes 263 ) is a nickel-chromium-cobalt alloy with excellent high-temperature properties, making it an ideal material for gas turbine components, jet engine exhaust systems, and industrial heating equipment.



    UNS N07263 ( Nimonic 263 Haynes 263 )

    Material grades and equivalents

    UNS N07263 / Nimonic 263  / GB GH4163 / DIN 2.4650 / Haynes 263

    Haynes 263 / Nimonic 263 characteristics and application fields of summary:

    Nimonic alloy 263 is an age-hardenable nickel-cobalt-chrome-molybdenum alloy which was designed to have excellent fabrication characteristics in the annealed condition but also very good aged strength properties. Alloy 263 is easier to form or weld than other materials such as Waspaloy or Rene 41 and exhibits excellent intermediate temperature ductility. Alloy 263 is supplied in the annealed condition and its excellent ductility in this condition makes it suitable for cold forming as well as hot working. Alloy 263 can be welded using matching composition filler wire in both TIG and MIG forms. The recommended heat treatments for Nimonic 263 are as follows:

    • Extruded Bar:

      Solution Treatment – 1150 °C for 1.5-2.5 hours + water quench

      Ageing Treatment – 800 °C for 8 hours + air cool

      (As per BS HR10 / AMS 5886)

    • Hot-rolled Sheet

      Solution Treatment – 1150 °C for 0.5 hours + water quench or air cool

      Ageing Treatment – 800 °C for 8 hours + air cool

      (As per BS HR206/ AMS 5872)

    • Cold-rolled Sheet

      Solution Treatment – 1150 °C for 3-10 mins + water quench or fluidized bed quenching

      Ageing Treatment – 800 °C for 8 hours + air cool

      (As per BS HR206 / AMS 5872)

    Haynes 263 / Nimonic 263 chemical component: 











    Nimonic 263



    0.60 max

    0.40 max


    0.60 max

    0.0005 max

    0.005 max

    0.07 max










    Nimonic 263

    0.20 max





    0.0020 max

    0.0001 max

    0.007 max

    Haynes 263 / Nimonic 263 Typical Mechanical Properties:

    Nimonic 263 Bar


    248 max

    Solution Treated (AMS 5886/ BS HR10)

    Nimonic 263 Bar


    585 (typical)

    1004 (typical)


    Heat Treated (AMS 5886 / BS HR10)

    Nimonic 263 Bar


    403 (min)

    541 (min)


    Heat Treated (AMS 5886/ BS HR10)

    Nimonic 263 Sheet


    22.5 max

    Solution Treated (AMS 5872 / BS HR206)

    Nimonic 263 Sheet


    580 (typical)

    973 (typical)

    39 –

    Heat Treated (AMS 5872 / BS HR206

    Nimonic 263 Sheet


    403 (min)

    541 (min)


    Heat Treated (AMS 5872 / BS HR206

    Fabrication and Working Instructions

    Nimonic 263 can be hot worked in the temperature range of 1742-2102°F (950-1150°C). Cold forming mechanical properties, on the other hand, are given in the following table:

    0.1% proof stress

    343 MPa

    0.2% proof stress

    355 MPa

    0.5% proof stress

    369 MPa

    Tensile strength

    788 MPa

    Elongation on 50 mm, %



    195 HV

    Mean grain size

    ASTM 6.5

    Erichsen value

    12.8 mm

    Shear strength

    588 MPa

    Ratio of shear to tensile strength


    Please note that the data is obtained using annealed sheet 0.5-1.2 mm thick, using annealing technique of 3 minutes at 1190°C by fluidized bed quenching.

    Annealing of Nimonic 263 is required during manipulations with the alloy. The following instructions should be followed regarding the shape or form:

    • Bar or heavy section is usually softened by a heat treatment that lasts two hours at 2102°F (1150°C);

    • Annealing of sheets should last 15 minutes at a temperature range of 1922-2012°F (1050-1100°C), followed by rapid cooling. For sheets, fluidized bed quenching can also be used.

    Depending on the joint configuration and material thickness, Nimonic alloy 263 can be readily welded by argon shielded automatic and manual T.I.G and M.I.G processes. For all argon shielded welding processes the filler metal is the AMS 5966 specification (Nimonic filler metal 263), available here. In the few next bulleted points, you can see all the different argon shielded welding processes:

    • Automatic T.I.G. welding can be employed on parts with a thickness of up to 3.25 mm, and only for simple butt joints without any special shaping. The Nimonic filler metal 263 should be used for parts thicker than 1.6 mm, while welding can be obtained without filler metal for parts that are thinner than 1.6 mm;

    • Manual T.I.G. welding should be employed on more complicated joints with special shaping and is recommended to be used on thicknesses of up to 4.8 mm;

    • I.G. welding can be used on all section thicknesses, but it is best to be used on thicknesses above 4.8 mm. Besides, it should be used over manual T.I.G. if a lot of welding is required. Both spray and dip transfer conditions can be used in this process.

    Other welding and joining processes that can be used on Nimonic alloy 263, but to a lesser extent:

    • Resistance spot, stitch and seam welding;

    • Flash-butt welding used for the manufacture of gas turbine rings.


    Haynes 263 / Nimonic 263 is available in Sheet, Strip, Plate, Bar, Round Bar, Flat Bar, Wire, Tube and Forgings.


    UNS N07263
    Werkstoff Nr. 2.4650
    BS HR10 Rod and Bar
    BS HR 206 Plate, Sheet, Strip
    BS HR 404 Seamless Tube
    AECMA PrEn 2199 Bar
    AECMA PrEn 2200 Forgings
    AECMA PrEn 2201 Bar
    AECMA PrEn 2202 Tube
    AECMA PrEn 2203 Sheet, Strip
    AECMA PrEn 2418 Plate
    DIN 17750 Plate, Sheet, Strip
    DIN 17751 Pipe and Tube
    DIN 17752 Bar and Rod
    DIN 17753 Wire
    DIN 17754 Forgings
    AMS 5872 Sheet, Plate and Strip
    AMS 5886 Bar, Forgings, Rings
    AFNOR NCK 20 D
    AIR 9165 Sheet, Plate, Rod, Bar and Forgings
    MSRR 7035
    MSRR 7036
    GE B50A774A

    As a low-expansion alloy material, Invar is widely used in many fields, and it has great application prospects as a core material for power transmission conductors. However, the current high price of Invar alloy limits its large-area application. Future research on Invar alloys should take into account low expansion properties and high strength while also considering the issue of low cost, thereby accelerating the application of Invar alloys, especially its promotion and application in transmission lines, which is very important for China. The development of power transmission technology is of great significance

    Shanghai HY Industry Co., Ltd has international first-class material production equipment such as high temperature alloy isothermal forging production line, CONSARC vacuum melting furnace, VAR vacuum arc remelting furnace etc., with strong professional ability and highly responsible management team. We are a member of China Application of nuclear energy materials, Member of the International Council of the Aeronautical Sciences,China Electronic Materials Industry Association Magnetic Materials Branch. Years of experience in special alloy. When you have superalloy material inquiry, please contact us without hesitation. Shanghai HY Industry Co., Ltd is Corrosion & fatigue nickel alloy professional manufacturer,We will provide you with sincere and thoughtful service.

    When you want to know more about our products, please contact us: