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Incoloy 800HT

Material: Alloy 800HT, UNS N08811, 1.4959, 1.4876
Type: Pipes
          Plates
          Bars
          Fittings
          Forgings
          Flanges
          Prefabrication
Availability:
Incoloy 800HT Features:

Incoloy 800HT(UNS N08811, 1.4959, 1.4876) is a full austenitic low carbon nickel-iron-chromium alloy of the same series as Incoloy 800. The cobalt content in this alloy can be strictly controlled below 0.01%.  Alloy 800HT has excellent creep strength at temperatures above 1290°F (700°C). If the application involves frequent temperature excursions under 1290°F (700°C) or parts of are permanently exposed to a temperature below 1290°F (700°C), Alloy 800H should be utilized. 


The high temperature resistance of Alloy 800HT is comparable to Alloy 800H.Incoloy 800HT is resistant to many corrosive media. Its high nickel content makes it resistant to stress corrosion cracking in aqueous corrosion conditions. The high chromium content provides better resistance to pitting and crevice corrosion cracking. 


The alloy has good corrosion resistance to nitric acid and organic acids, but limited corrosion resistance in sulfuric acid and hydrochloric acid. Good corrosion resistance in oxidizing and non-oxidizing salts, in addition to the potential for pitting corrosion in halides. It also has good corrosion resistance in water, steam and mixtures of steam, air and carbon dioxide.


The Chemical Composition of Incoloy 800HT, %

Grade

Ni

Cr

Fe≥

Al

C

Mn≤

P≤

Si≤

S≤

Al & Ti≤

Cu≤

Incoloy 800HT

30.0-35.0

19.0-23.0

39.5

0.25-0.60

0.06-0.10

1.5

0.04

1

0.015

0.5-1.20

0.75


Physical Properties of Incoloy 800HT

Density: 8.0 g/cm3

Melting point: 1350-1400 ℃


Incoloy 800HT Mechanical Properties

Mechanical properties

Tensile, min, ksi[MPa]

Yield, min, ksi[MPa]

Elongation, %(min)

Incoloy 800HT

65[450]

25[170]

30


Incoloy 800HT Equivalent Grades

STANDARD

WERKSTOFF.NR.

UNS

JIS

BS

GOST

EN

OR

Incoloy 800HT

1.4959 / 1.4876

N08811

NCF 800HT

NA 15(HT)

ЭИ670

X8NiCrAlTi32-21

XH32T


Incoloy 800HT has the Following Properties

  • Excellent corrosion resistance in very high temperature aqueous media up to 500℃

  • Good resistance to stress corrosion

  • Good workability


Incoloy 800HT ASTM Specifications

Product From

Rod & Bar

Plate, Sheet & Strip

Seamless Pipe & Tube

Welded fittings

Forging

Standard

ASTM B408, EN 10095

ASTM A240, A480, ASTM B409, B906

ASTM B407

ASTM B366

ASTM B564, DIN 17460


Incoloy 800HT application:

  • Ethylene furnace quench boilers

  • Hydrocarbon cracking

  • Industrial furnaces

  • Heat-treating equipment

  • Chemical and petrochemical processing

  • Super-heater and re-heaters in power plants

  • Pressure vessels

  • Heat exchangers


JN Alloy Products

JN Alloy is a distributor and product manufacturer of stainless steel, duplex steel, and nickel.
Tel: +86 19339900211
Add: Stainless steel Market 289, Xinwu District , Wuxi, China
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