Incoloy 800/H/Ht

Incoloy 800 is also known as Alloy 800. Its nickel-iron-chromium composition makes it useful in environments with temperatures up to 1100° F. Incoloy 800/H/HT are used in areas where resistance to corrosion and oxidation is crucial.
Incoloy 800H has the same composition as Alloy 800: a nickel-iron-chromium alloy. However, Incoloy 800H has superior resistance to creep rupture compared to Alloy 800. The increased strength results from a high temperature anneal of carbon, aluminum and titanium added into the composition. The additions serve to increase Incoloy 800 H’s strength and temperature resistance, along with resistance to carbonization and oxidation.
Incoloy 800 HT has the same chemical makeup as Incoloy 800 H but for the differences in carbon, aluminum and titanium quantities. Incoloy 800 H has more carbon, but Incoloy 800 HT is composed of more aluminum and titanium. This gives 800 HT even greater resistance to high temperatures. Incoloy 800 H/HT are recommended for temperatures exceeding 1100° F, often in instances where stainless steels are subject to crack and creep. The Incoloy alloys are commonly used in high temperature environments, such as industrial furnaces, chemical and nuclear vessels, and heat-treating equipment. Both Incoloy 800 H and 800 HT are dually certified.

Paper & Pulp Industry

Specifications – Incoloy 800 / 800H / 800HT

StandardIncoloy 800Incoloy 800HIncoloy 800Ht
UNSN08800N08810N08811
Werkstoff Nr.1.4876 1.4958 / 1.48761.4959 / 1.4876
ENX10NiCrAlTi32-20 X5NiCrAlTi31-20 X8NiCrAlTi32-21
BS NA 15 NA 15(H) NA 15(HT)
ORXH32TXH32TXH32T
GOSTЭИ670ЭИ670ЭИ670
JISNCF 800NCF 800HNCF 800Ht
AFNOR Z8NC32-21 Z8NC33-21

Physical Properties – Incoloy 800 / 800H / 800HT

Density0.287 lb/in3 / 7.94 g/cm3
Melting Point 2475 – 2525 °F/ 1357 – 1385 °C
Specific Heat @ 70°F0.11 Btu/lb•°F
Permeability @ 70°F Annealed 1.014 (200 Oersted)
Curie Temperature-115 °C/ -175 °F
Elastic Modulus28.50 X 106 psi
Electrical Resistivity @ 70°F595 ohm•circ mil/ft
Annealling Incoloy 800983 – 1038 °C / 1800 – 1900 °F
Annealling Incoloy 800H / Ht1147 – 1177°C / 2100 – 2150 °F
QuenchRapid Air / Water

Chemical Composition – Incoloy 800 / 800H / 800HT

ElementIncoloy 800Incoloy 800HIncoloy 800Ht
Ni30.0 – 35.030.0 – 35.030.0 – 35.0
Cr19.0 – 23.019.0 – 23.019.0 – 23.0
Fe39.5 min39.5 min39.5 min
Mn1.5 max1.5 max1.5 max
C0.10 max0.05 – 0.100.06 – 0.10
Cu0.75 max0.75 max0.75 max
Si1.0 max1.0 max1.0 max
S0.015 max0.015 max0.015 max
Al0.15 – 0.600.15 – 0.600.15 – 0.60
Ti0.15 – 0.600.15 – 0.600.15 – 0.60

* UNS N08811 : Al + Ti = 0.85 – 1.20

Furnace Parts

Incoloy 800 / 800H / 800HT Products

Pipes & Tubes
Tubing
Seamless Pipe
Round Bar
Square Bar
Hex Bar
Sheet
Coil
Plate
Elbow / Bends
Fitting-Flanges-Reducer
Fitting-Flanges-Stubend
Fitting-Flanges-cap
Flanges-sorf-wnrf
Fitting-Flanges-fasteners
Wire-filler
Wire-coil
Wire-spool