Incoloy 800H Sheets

Incoloy 800H Sheet:
Other common names: Alloy 800 Sheet, Alloy 800H Sheet/Ni-Fe-Cr Alloy Sheet

Incoloy 800H sheet Properties:

Incoloy 800 Sheet, 800H Sheet, and 800HT Sheet are nickel-iron-chromium alloys Sheets with good strength and excellent resistance to oxidation and carburization in high-temperature exposure. Incoloy 800H/HT alloy Sheet was intended for high temperature structural applications. The nickel content makes the alloys highly resistant to both chloride stress-corrosion cracking and to embrittlement from precipitation of sigma phase. The general corrosion resistance is excellent. In the solution annealed condition, alloys 800H Sheet and 800HT Sheet have superior creep and stress rupture properties.

Incoloy 800 Sheet is primarily used in applications with temperatures up to 1100° F, where alloys 800H Sheet and 800HT Sheet are normally used in temperatures above 1100° F and where resistance to creep and rupture is required. The chemical balance allows the nickel steel alloy to exhibit excellent resistance to carburization, oxidation and nitriding atmospheres. Incoloy 800HT sheet will not become embrittled even after long periods of usage in the 1200-1600° F range where many stainless steels become brittle.
 

These nickel alloy sheets are identical except for the higher level of carbon in alloy 800H, and the addition of up to 1.20 percent aluminum and titanium in alloy 800HT sheet. Incoloy 800 sheet was the first of these alloys sheets and it was slightly modified into Incoloy 800H sheets. This modification was to control carbon (.05-.10%) and grain size to optimize stress rupture properties. Incoloy 800HT sheet has further modifications to the combined titanium and aluminum levels (.85-1.20%) to ensure optimum high temperature properties. The nickel alloy is dual certified (800H/HT) and combines the properties of both forms.

Alloys 800H/HT Sheet 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.