UNS N08811 (Incoloy 800HT)

Short Introduction:

  • Incoloy 800HT/Z8NC32.21/W Nr.1.4876/X10NiCrAlTi322/NA15 /UNS NO8811/FeNi32Cr21AlTi is resistant to many corrosive media. Its high nickel content makes it have good resistance to stress corrosion cracking in aqueous corrosion conditions. High chromium content makes it more resistant to pitting and crevice corrosion cracking. The alloy has good resistance to nitric acid, organic acid corrosion, but in sulfuric acid and hydrochloric acid corrosion resistance is limited. Except for the possibility of pitting corrosion in halides, there is good corrosion resistance in oxidizing and non-oxidizing salts. In water, steam and steam, air, carbon dioxide mixture also has good corrosion resistance.



    Incoloy 800HT UNS N08811

    Material grades and equivalents:Incoloy 800HT/Z8NC32.21/W Nr.1.4876/X10NiCrAlTi322/NA15 /UNS NO8811/FeNi32Cr21AlTi


    Incoloy800HT Chemical Composition:










    39.5 min






    Incoloy800HT Physical properties:


    8.0 g/cm³


    Melting point


    1350-1400 ℃


    Incoloy800HT Characteristic as below:

    1. Incoloy800HT Characteristic as below:

    2. Excellent corrosion resistance in very hot aqueous media up to 500 ° C

    3. Good resistance to stress corrosion 3.Very good workability

    Incoloy  800HT Application range and field:

    1Nitric acid condenser – resistant to nitric acid corrosion 2.Steam heating tube – very good mechanical properties 3.Heating element tubes – very good mechanical properties 4.For applications up to 500 ° C, the alloy is annealed.



    Rod, Bar, Wire, Forgings, and Forging Stock

    ASTM B 408 & ASME SB 408;ASTM B 564 & ASME SB 564;ASME Code Case 1325;ASME Code Case 1949;ISO 9723;ISO 9724;ISO 9725;BS 3076NA15;BS

    3075NA15;SEW 470;VdTÜV 412 & 434;DIN 17460;EN 10095

    Plate, Sheet, and Strip

    ASTM A 240/A 480;ASME SA 240/SA 480;ASTM B 409/B 906;ASME SB 409/SB 906;ASME Code Case 1325;ASME Code Case 2339;BS 3072NA15;BS 3073NA15;SEW

    470;VdTÜV 412 & 434;DIN 17460;EN 10028-7 & EN 10095

    Pipe & Tube

    ASTM B 163;ASME SB 163;ASTM B 407/B 829;ASME SB 407/SB 829;ASTM B 514/B 775;ASME SB 514/SB 775;ASTM B 515/B 751;ASME SB 515/SB 751;ASME Code Case

    1325 and 1983;BS 3074NA15;SEW 470;VdTÜV 412 & 434;ISO 6207;DIN 17459


    ASTM B 366/ASME SB 366