Incoloy

UNS: N08811

800HT

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Equivalent

UNS: N08811

Chemical Composition (%)

 

C

Fe

Ni

Ti

Al+Ti

Cr

Al

Min

0.06

39.5

30.0

0.25

0.85

19.0

0.25

Max

0.10

–

35.0

0.60

1.20

23.0

0.60

800 VS 800H VS 800HT

UNS designation N08800 N08810 N08811
INCOLOY alloys 800  800H 800HT
Nickel 30.0-35.0 30.0-35.0 30.0-35.0
Chromium 19.0-23.0 19.0-23.0 19.0-23.0
Iron 39.5 min. 39.5 min. 39.5 min.
Carbon 0.10 max. 0.05-0.10 0.06-0.10
Aluminum 0.15-0.60 0.15-0.60 0.25-0.60
Titanium 0.15-0.60 0.15-0.60 0.25-0.60
Aluminum + Titanium 0.30-1.20 0.30-1.20 0.85-1.20
ASTM grain size Not specified 5 or coarser 5 or coarser

Electrical and Thermal Properties

Temperature Electrical
Resistivity		 Thermal
Conductivity		 Coefficient of
Expansiona
°F ohm•circ mil/ft Btu•in/ft2•h°F 10-6  in/in/°F
70  595  80  –
100  600  83  –
200  620  89  7.9 
400  657  103  8.8 
600  682  115  9.0 
800  704  127  9.2 
    1000  722  139  9.4 
    1200  746  152  9.6 
    1400  758  166  9.9 
    1600  770  181  10.2 
    1800  776  214  –
    2000  788  – –

Modulus of Elasticity

Temperature Tensile
Modulus		 Shear Modulus Poisson’s
Ratiob
    °F 103  ksi 103  ksi
   -310  30.55  11.45  0.334 
75  28.50  10.64  0.339 
   200  27.82  10.37  0.341 
   400  26.81  9.91  0.353 
    600  25.71  9.47  0.357 
    800  24.64  9.04  0.363 
1000  23.52  8.60  0.367 
1200  22.37  8.12  0.377 
1400  21.06  7.58  0.389 
1600  19.20  6.82  0.408 

Tensile Properties

Temperature Hardness
BHN		 Tensile Strength Yield Strength
(0.2% Offset)
°F     °C ksi MPa     ksi MPa
80      27  126  77.8  536      21.7  150 
800  425  – 67.5  465      18.8  130 
1000  540  90  62.7  432      13.0  90 
1200  650  84  54.8  378      13.5  93 
1300  705  82  47.7  329      15.8  109 
1400  760  74  34.2  236      13.1  90 

Available Products

  • COIL
  • SHEET/PLATE
  • TUBE
  • ROD
  • WIRE
  • FORGINGS

Advantages

INCOLOY 800HT is resistant to a wide range of corrosive media, such as nitric acid and organic acids. It also maintains good corrosion resistance in oxidizing and non-oxidizing salts. It also has good corrosion resistance in water, vapors, and mixtures of steam, air, and carbon dioxide.

The higher nickel content gives it good resistance to stress corrosion cracking under aqueous corrosive conditions.

The high chromium content significantly improves the alloy’s resistance to pitting and crevice corrosion cracking.

Note：however, that corrosion resistance in sulfuric and hydrochloric acids is limited.

INCOLOY 800HT has good machinability and can be adapted to various machining needs.

INCOLOY 800HT is suitable for welding by any conventional welding process, such as tungsten electrode inert gas shielded welding, plasma arc welding, manual subarc welding, metal pole inert gas shielded welding, fusion electrode inert gas shielded welding, shielded gas arc welding and so on. However, the welding must be carried out in the annealed state and cleaned of stains, dust and various marks.

Applications

1.Petrochemical industry

2.Nuclear Power Industry

3.Solar Energy Industry

4.Food Processing Industry

5.Chemical industry

6.Aerospace

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