Zhengzhou Huitong Pipeline Equipment Co.,Ltd. |
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ASTM B 409, B 408, B 407, B 564
UNS Number N08810/N08811
Other common names: Alloy 800, Alloy 800H/HT
Incoloy 800, 800H, and 800HT are nickel-iron-chromium alloys with
good strength and excellent resistance to oxidation and
carburization in high-temperature exposure. These 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. Incoloy 800 was the first of these alloys and it
was slightly modified into Incoloy 800H. This modification was to
control carbon (.05-.10%) and grain size to optimize stress rupture
properties. 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. Today, most
suppliers, only carry the dual certified 800H/HT alloy.
Incoloy 800 is primarily used in applications 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.
In what forms is Incoloy® 800H/HT available?
• Sheet
• Plate
• Bar
• Pipe & Tube (welded & seamless)
• Fittings (i.e. flanges, slip-ons, blinds, weld-necks, lapjoints,
long welding necks, socket welds, elbows, tees, stub-ends, returns,
caps, crosses, reducers, and pipe nipples)
• Wire
What are the characteristics of Incoloy 800H/HT?
• High temperature strength
• High creep rupture strength
• Resistant to oxidation and carburization in high temperature
environments
• Good corrosion resistance in many acidic environments
• Good resistance to many sulfur-containing atmospheres
Ni | Cr | Fe | C | Al | Ti | Al+Ti |
30.0-35.0 | 19.0-23.0 | 39.5 min | .10 max | .15-.60 | .15-.60 | .30-1.20 |
Ni | Cr | Fe | C | Al | Ti | Al+Ti |
30.0-35.0 | 19.0-23.0 | 39.5 min | .05-.10 | .15-.60 | .15-.60 | .30-1.20 |
Ni | Cr | Fe | C | Al | Ti | Al+Ti |
30.0-35.0 | 19.0-23.0 | 39.5 min | .06-.10 | .25-.60 | .25-.60 | 0.85-1.2 |
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 |
Product | Tensile (ksi) | .2% Yield (ksi) | Elongation (%) |
Rod & Bar | 75-100 | 30-60 | 60-30 |
We can provide Alloy 800, 800H, 800HT material in the form of flange, fittings, pipes, fasteners.