Nickel Alloy Incoloy 800 800H Pipe and Tube General Description Incoloy 800 /800H is a nickel-iron-chromium alloy with good strength and excellent resistance to oxidation and carburization in high-temperature atmospheres. A high chromium content gives Incoloy 800 good resistance to oxidation. It also resists many aqueous media and is relatively free from stress-corrosion cracking. Incoloy 800 has excellent resistance to at concentrations up to approximately 70% and at temperatures up to the boiling point. It also has good resistance to organic acids, such as formic, acetic, and propionic. It resists a variety of oxidizing and nonoxidizing salts, but not halide salts. Typical applications are heat treating equipment, petrochemical pyrolysis tubing and piping systems, sheathing for electrical heating elements, food processing equipment. Chemical Composition
Grade
Ni%
Cr%
Fe%
C%
Mn%
S%
Si%
Cu%
Al%
Ti%
Incoloy 800
30.0-35.0
19.0-23.0
Min 39.5
Max 0.10
Max 1.50
Max 0.015
Max 1.0
Max 0.75
0.15-0.60
0.15-0.60
Grade
Ni%
Cr%
Fe%
C%
Mn%
Si%
Cu%
S%
AL%
Ti%
Al+Ti%
Incoloy 800H
30.5-35.0
19.0-23.0
Bal.
0.05-0.10
Max 1.5
Max 1.0
Max 0.75
Max 0.015
0.15-0.60
0.15-0.60
0.30-1.20
Incoloy 800HT
30.0-35.0
19.0-23.0
Bal.
0.06-0.10
Max 1.5
Max 1.0
Max 0.75
Max 0.015
0.25-0.60
0.25-0.60
0.85-1.20
Specifications
Grade
UNS
Werkstoff Nr.
Incoloy 800
N08800
1.4876
Grade
UNS
Werkstoff Nr.
Incoloy 800H
N08810
1.4958
Incoloy 800HT
N08811
1.4959
Physical Properties
Grade
Density
Melting Point
Incoloy 800
8.0 g/cm3
1350°C-1400 °C
Grade
Density
Melting Point
Incoloy 800H/800HT
8.0 g/cm3
1370°C-1400 °C
Mechanical Properties
Grade
Tensile Strength
Yield Strength
Elongation
Incoloy 800
520 N/mm²
205 N/mm²
30%
Alloy
Tensile Strength
Yield Strength
Elongation
Incoloy 800H/800HT
450 N/mm²
170 N/mm²
35%
Welding of Incoloy 800 Any traditional welding procedures can be used to weld Incoloy 800 to similar alloys or other metals, such as gas tungsten arc welding(GTAW), plasma arc welding (PAW), metal inertia gas welding (MIG) and so on. Before welding, remove scale, grease, mark and imprint. Recommend filler wire regarding welding Incoloy 800: ERNiCrMo-3