UNS N08811 DIN W. Nr. 1.4959
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Form
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ASTM
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Rod and bar
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B 408
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Plate, sheet and strip
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A 240, A 480, B 409, B 906
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Seamless pipe and tube
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B 407, B 829
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Welded pipe
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B 514, B 775
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Welded tube
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B 515, B 751
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Welding fitting
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B 366
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Forging
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B 564
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Chemical composition
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%
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Fe
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Ni
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Cr
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C
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Mn
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Si
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S
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Cu
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Al
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Ti
|
|
min
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39.5
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30.0
|
19.0
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0.05
|
|
|
|
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0.15
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0.15
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max
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|
35.0
|
23.0
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0.10
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1.50
|
1.00
|
0.015
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0.75
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0.60
|
0.60
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Physical properties
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Density
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7.94 g/cm3
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Melting range
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1357-1385℃
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Features: Incoloy 800H has a restricted carbon content range of 0.05 to 0.10%, which is in the upper portion of that of Incoloy 800, and is annealed at 1149 to 1177℃ (Incoloy 800 is annealed at 983 to 1038℃). These differences impart it to have higher stress rupture and creep properties than Incoloy 800.
Applications: Chemical and petrochemical process piping, high temperature heat exchangers, furnace components, carburizing equipment, heating-element sheathing, and nuclear power steam superheating tubing.
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