Inconel 800 Bolts with World Wide
Lightning Bolt specializes in hard-to-find and exotic alloy bolting.
One of those alloys we excel in is Inconel. Also known as Incoloy
800, 800H, and 800HT is a nickel-iron-chromium alloys with good
strength and excellent resistance to oxidation and carburization in
These alloys are commonly made into
nuts, bolts, studs, and washers for their high resistance to
corrosive environments. Such nickel steel alloys 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.
It should be noted that Incoloy 800 was the first of these alloys
and it was slightly modified into Incoloy 800H. Incoloy 800HT 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. Incoloy 800H/HT
alloy 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 and 800HT have superior
creep and stress rupture properties.
Common applications of Incoloy 800 is in eviroments with
temperatures up to 1100° F, where alloys 800H and 800HT are normally
used in temperatures above 1100° F 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 will not become embrittled
even after long periods of usage in the 1200-1600° F range where
many stainless steels become brittle.
Excellent cold forming characteristics
typically associated with the nickel-chromium alloys are exhibited
with 800HT. When cold formed extensively the grain size produces a
visibly undulated surface called “orange peel”. Incoloy 800HT can be
welded by the common techniques used on stainless steels.
Incoloy® alloy 800 is a widely used material of construction for
equipment that must have high strength and resist oxidation,
carburization, and other harmful effects of high-temperature
exposure. (For high temperature applications requiring optimum creep
and rupture properties, Incoloy® alloys 800H and 800HT® are used).
The chromium in the alloy imparts resistance to oxidation and
corrosion. The high percentage of nickel maintains an austenitic
structure so that the alloy is ductile. the nickel content also
contributes resistance to scaling, general corrosion, and
stress-corrosion cracking. The iron content provides resistance to
Incoloy® alloy 800 is used in a variety of applications involving
exposure to corrosive environments and high temperatures. It is used
for heat-treating equipment such as baskets, trays and fixtures. In
chemical and petrochemical processing the alloy is used for heat
exchangers and other piping systems in nitric acid media especially
where resistance to chloride stress-corrosion cracking is required.
In nuclear power plants, it is used for
steam-generator tubing. The alloy is often used in domestic
appliances for sheathing of electric heating elements. In the
production of paper pulp, digester liquid heaters are often made of
alloy 800. In petroleum processing , the alloy is used for heat
exchangers that air-cool the process stream.
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
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.
For hard-to-find alloys such as Inconel 800, contact Lightning Bolt
for all of your corrosive resistant fasteners.
For More Information or to Place Orders
To learn more about our products, or to
place an order, please call (225) 272-6200 or send an email to
For calls placed from outside of the United States, please call
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