1.High temperature strength
2. High creep rupture strength
3.Resistant to oxidation and carburization in high temperature environments
4.Good corrosion resistance in many acidic environments
5.Good resistance to many sulfur-containing atmospheres
|30.0-35.0||19.0-23.0||39.5 min||.10 max||.15-.60||.15-.60||.30-1.20|
Alloy 800H (UNS N08810) Chemical Composition(%)
Alloy 800HT (UNS N08811) Chemical Composition( %)
*Note that the chemical composition of Incoloy 800HT will always be within the limits of Incoloy 800H.
*Note the limits of Incoloy 800H may or may not be within the limits of Incoloy 800HT.
In what applications is Incoloy 800H/HT used?
Ethylene furnace quench boilers
Valves, fittings and other components exposed to corrosive attack from 1100-1800° F
Chemical and petrochemical processing
Super-heater and re-heaters in power plants
Alloys 800H/HT are used in a variety of applications involving exposure to corrosive environments and high temperatures such as heat treating equipment, chemical and petrochemical processing, nuclear power plants and the paper pulp industry. Heat-treating equipment such as baskets, trays, and fixtures employ Incoloy 800H/HT. Chemical and petrochemical processing industries use the alloys for heat exchangers and other piping systems in nitric acid media especially where resistance to chloride stress-corrosion cracking is required. Power plants use them for super-heater and re-heater tubing.
|Alloy||Pipe Smls||Pipe Welded||Tube Smls||Tube Welded||Sheet/Plate||Bar||Forging||Fitting|
|Alloy 800 (UNS N08800)||B407||B154||B163||B515||B409||B408||B564||B366|
|Alloy 800H (UNS N08810)||B407||B154||B163||B515||B409||B408||B564||B366|
|Alloy 800HT (UNS N08811)||B407||B154||B163||B515||B409||B408||B564||B366|
Typical room temperature Tensile Properties of Annealed Material
|Product||Tensile (ksi)||.2% Yield (ksi)||Elongation (%)|
|Rod & Bar||75-100||30-60||60-30|