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Alloy 800H

ASME B168, EN 2.4856, INCONEL 625

Forms

Applications

Alloy 800H Applications

Alloy 800H and Alloy 800 HP have a wide range of applications in areas of elevated temperatures in furnace construction, in the chemical industry, in environmental protection equipment, in the automotive industry and in power plants. Typical applications include furnace muffles, containers, bins, holders in various heat treatment plants and burner components.

Because of their resistance to carburization and nitriding, the alloys are furthermore used in the areas of:

  • Steam/hydrocarbon reformers.
  • ethylene pyrolysis.
  • Equipment for acetic anhydride and ketone production
Alloy 800 H is characterized by Alloy 800 HP is characterized by
  • Good creep rupture strength at temperatures
    above 600 °C (1,112 °F).
  • good resistance in oxidizing, nitriding and
    carburizing conditions.
  • metallurgical stability in long-term use at high
    temperatures
  • Excellent creep rupture strength at temperatures above 700 °C (1,290 °F).
  • Good resistance to reducing, oxidizing and nitriding atmospheres and to atmospheres
    which alternate between reducing and oxidizing conditions.
  • Metallurgical stability in long-term use at high
    temperatures
    .
Alloy 800 Plate Standards
Rod,Bar - 10095
10302
SB 408
SB 564
B 408
B 564
Sheet,Plate - 10028-7
10095
10302
SA 240
SB 409
A 240
B 409
Strip - 10028-7
10088-1
10095
10302
SA 240
SB 409
A 240
B 409
Alloy 800 Designations
EN 1.4876 - X10NiCrAlTi32-201
ISO FeNi32Cr21AlTi-HC
UNS N08810
AFNOR -
Alloy 800 Chemical Composition
Min 30 19 43 0.06 0.5 0.2 - 0.2 0.2 - - -
Max 32 21 50 0.1 1 0.6 0.5 0.6 0.6 0.015 0.01 0.7
Alloy 800 Physical Properties
8.0 g/cm3 (0.29 lb/in3) 1,350 - 1,400 ℃(2,462 - 2,552 ℉) 1.01
Specific Heat 443/0.106 474/0.113 548/0.131 598/0.143 613/0.146 634/0.151
Thermal Conductivity 12.4/86 15.3/106.2 21.4/148.5 25.8/179 28/194.3 30.6/212.3
Electrical Resistivity 101 108 118 124 127 129
Modulus Of Elasticity 194/28.1 183/26.5 163/23.6 141/20.5 127/18.4 113/16.4
Co-efficient of Thermal Expansion 14/7.78 14.6/8.11 15.49/8.61 16.98/9.43 17.76/9.87 18.74/10.41
Alloy 800 Mechanical Properties
Yield Strength
MPa/ksi
170/24.7 115/16.7 85/12.3 75/10.9
Tensile Strength
MPa/ksi
450-700/85.3-101.5 400/58 380/55.1 300/43.5
Elongation
%
35 - - -
Alloy 625 Inventory
Alloy 625 Pipe 0.5 in 8 in
Alloy 625 Coil 0.25 mm 3.18 mm
Alloy 625 Welding Wire 0.5 mm 3.175 mm
Alloy 625 Sheet and Plate 0.25 mm 76.2 mm
Alloy 625 Round Bar 12 mm 260 mm
Alloy 625 Pipe Fittings 0.5 in 8 in
Alloy 625 Flanges 0.5 in 8 in

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WELDING

Welding Alloy 800

For welding, Alloy 800 H and 800 HP should be in the annealed condition and be free from scale, grease and
markings.Alloy 800 H and 800 HP can be welded using the following procedures: GTAW (TIG), GTAW (TIG)
hot wire, plasma, SMAW (MMA), GMAW (MIG/MAG) and submerged arc welding.

Filler metal
The following filler materials are recommended:

Welding rods, welding wire and wire electrodes
  • FM 82 (W.-Nr. 2.4806).
  • DIN EN ISO 18274: S Ni 6082 (SG/UP-NiCr 20 Nb).
  • AWS A 5.14: ERNiCr-3.
  • Covered electrodes can be used.