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Alloy steel is steel alloyed with a variety of elements in total amounts of between 1.0% and 50% by weight to improve its mechanical properties. Alloy steels are broken down into two groups: low alloy steels and high alloy steels. The difference between the two is somewhat arbitrary: Smith and Hashemi define the difference at 4.0%, while Degarmo, et al., define it at 8.0 %.[1][2] Most commonly, the phrase "alloy steel" refers to "low alloy" steels.
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Home » Alloy and Carbon Steel » Product introduction
Alloy 800HT Steel
- Numbers: 2011072105
- Model: Alloy 800H
- Producers: China
- Update time: 2011.07.21
- Browse:
Product Description:
ASTM B 409, B 408, B 407, B 564
UNS Number N08810/N08811
Chemical Composition
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Ni
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Fe
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Cr
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Cu
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Ti
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Al
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C
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Mn
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S
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Si
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30.0-35.0
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39.5 min
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19.0-23.0
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.75 max
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.25-.60
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.85-1.20
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.06-.10 max
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1.5 max
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.015 max
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1.0 max
|
|
Ni
|
Fe
|
Cr
|
Cu
|
Ti
|
Al
|
C
|
Mn
|
S
|
Si
|
|
30.0-35.0
|
39.5 min
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19.0-23.0
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.75 max
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.25-.60
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.85-1.20
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.06-.10 max
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1.5 max
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.015 max
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1.0 max
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|
Alloy
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Pipe Smls
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Pipe Welded
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Tube Smls
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Tube Welded
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Sheet/Plate
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Bar
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Forging
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Fitting
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Alloy 800 (UNS N08800)
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B407
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B154
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B163
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B515
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B409
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B408
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B564
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B366
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Alloy 800H (UNS N08810)
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B407
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B154
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B163
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B515
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B409
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B408
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B564
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B366
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Alloy 800HT (UNS N08811)
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B407
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B154
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B163
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B515
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B409
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B408
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B564
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B366
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Typical room temperature Tensile Properties of Annealed Material
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Tensile (ksi)
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.2% Yield (ksi)
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Elongation (%)
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|
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Rod & Bar
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75-100
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30-60
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60-30
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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
- 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 Alloy 800HT Tube Alloy 800HT Pie-shaped Alloy 800HT Ring Alloy 800HT Module Large valves of the main Alloy 800HT Other Profiled forgings Alloy 800HT
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.
