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Home » Alloy and Carbon Steel » Product introduction

INCOLOY 800H / 800HT Steel

Numbers: 2011072102
Model: INCOLOY 800H / 800HT
Producers: China
Update time: 2011.07.21
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Product Description:

Alloy steel

INCOLOY 800H / 800HT Steel

ASTM B 409, B 408, B 407, B 564
UNS Number N08810/N08811

Other common names: Alloy 800, Alloy 800H/HT

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.

ASTM Specifications

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

Mechanical Properties
Typical room temperature Tensile Properties of Annealed Material

Product	Tensile (ksi)	.2% Yield (ksi)	Elongation (%)
Rod & Bar	75-100	30-60	60-30

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, including Mega Mex, 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.

Incoloy® 800H/HT available Froms

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

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

Incoloy 800H/HT Application

Ethylene furnace quench boilers
Hydrocarbon cracking
Valves, fittings and other components exposed to corrosive attack from 1100-1800° F
Industrial furnaces
Heat-treating equipment
Chemical and petrochemical processing
Super-heater and re-heaters in power plants
Pressure vessels
Heat exchangers

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.

Product description:

Step Shaft INCOLOY 800H / 800HT Steel Tube INCOLOY 800H / 800HT Steel Pie-shaped INCOLOY 800H / 800HT Steel Ring INCOLOY 800H / 800HT Steel Module Large valves of the main INCOLOY 800H / 800HT Steel Other Profiled forgings INCOLOY 800H / 800HT Steel

Special Steel classification:

Stainless steel, Hi-Steel HSLA-80, Mould steel, Heat resistant steel, Tool steel, Ball bearing steel,Spring steel, Alloy steel, Construction steel, Die steel, High-speed steel, angles, channels, H steel, I-beams, welded pipes, seamless tubes,

Standard:
Our products meet Chinese GB, Japanese JIS, US ASTM, UK BS, EU DIN standards and so on.

Our advantages:

Our advantages such as advanced management and operation concepts, suitable work facilities, highly qualified talents and a number of trade partners who have long-term and close cooperation with us have ensured us to provide global customers with competitive high-quality commodities and excellent services, quickly, accurately, conveniently and completely.

Products Introduction:

Specifications

Round bar:
Diameter : 1mm-2000mm

Square bar:
Size: 50mm * 50mm-600mm *600mm

Plate steel/flat bar:
Size: Thickness: 0.1mm-800mm Width: 10mm to 1500mm

Tube/pipe:
Size: OD: 6-219mm WT: 1-35 mm.

Cold-rolled sheet: Thickness: 2-5mm Width:1000mm Length: 2000mm

Hot-rolled sheet: Thickness:6-80mm Width: 210-610mm

Length: We can supply any length based on the customer's requirement.

Forging/hot rolling/ extrusion of steel.

Forging: Shafts with flanks/pipes/tubes/slugs/donuts/cubes/other shapes

Finished goods condition: hot forging/hot rolling + annealing/normalizing + tempering/quenching + tempering/any conditions based on the customer's requirement

Surface conditions: scaled (hot working finish)/ground/rough machining/fine machining/based on the customer's requirement

Furnaces for metallurgical processing: electrode arc + LF/VD/VOD/ESR/Vacuum consumable electrode.

Ultrasonic inspection: 100% ultrasonic inspection for any inperfections or based on the customer's requirement

Excellent service for all kinds of industries, with advantages of technologies, equipment and price.

We serve you with our honesty, integrity, and professionality.

Alloy 800 (UNS N08800) Chemical Composition, %

Ni	Fe	Cr	Cu	Ti	Al	C	Mn	S	Si
30.0-35.0	39.5 min	19.0-23.0	.75 max	.15-.60	.15-.60	.1 max	1.5 max	.015 max	1.0 max

Alloy 800H (UNS N08810) Chemical Composition, %

Ni	Fe	Cr	Cu	Ti	Al	C	Mn	S	Si
30.0-35.0	39.5 min	19.0-23.0	.75 max	.15-.60	.15-.60	.05-.10 max	1.5 max	.015 max	1.0 max

Alloy 800HT (UNS N08811) Chemical Composition, %

Ni	Fe	Cr	Cu	Ti	Al	C	Mn	S	Si
30.0-35.0	39.5 min	19.0-23.0	.75 max	.25-.60	.85-1.20	.06-.10 max	1.5 max	.015 max	1.0 max