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


Incoloy 800HT Chemical Composition:










39.5 min






Incoloy 800HT Physical properties:


8.0 g/cm³


Melting point


1350-1400 ℃


Incoloy 800HT Characteristic as below:

  1. Incoloy 800HT 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