ASTM B 409, B 408, B 407, B 564

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

Inconel 800 is an iron-nickel-chromium alloy having sufficient resistance to carburization and oxidation at high temperatures as well as moderate strength. It is especially useful for high-temperature equipment in the petrochemical industry since the alloy doesn't form the embrittling sigma phase after long time exposure at 1200°F. Another important feature of Inconel 800 is excellent resistance to chloride stress-corrosion cracking.

Alloy 800H is a solution heat treated (2100°F), controlled-carbon version of Alloy 800 with improved elevated temperature properties. It has high creep and stress-rupture characteristics in the 1100°F to 1800°F temperature range.

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 at SAGAR STEELS?

• 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

Specifications

Inconel 800, Incoloy 800

AMS 5871, ASTM B409, AMS 5877, BS 3072NA15, BS 3073NA15, DIN 17460, EN 10028-7, EN 10095

Stock Size: Thickness: 0.025"~3.00"

Width & Length: 36" X 120" or 48" X 144"

Inconel 800, Incoloy 800 Tubing

Standards: ASTM-B-163, ASTM-B-407, ASTM-B-514, ASTM B829, ASTM-B-775, ASTM-B-515, ASTM-B-751, BS3 3074NA15, ISO 6207, DIN 17459

Stock Size: OD 1/16"~3", Wall: 0.010"~0.250", Length: 17'/24' FT R/L

3/8" OD x 0.049" Wall x 20 FT

1/4" OD x 0.049" Wall x 20 FT

Inconel 800, Incoloy 800 Pipe

Standards:ASTM-B-514, ASTM B829, ASTM B775, ASTM B515, ASTM B751, BS3 3074NA15, ISO 6207, DIN 17459

Stock Size: 1/4" sch 10 to 16" sch 80

Inconel 800, Incoloy 800 Bar

Standards: AMS 5766, ASTM-B-408, ASME-B-408, ISO 9723, ISO 9724, BS 3076NA15, BS 3075NA15, EN 10095

Stock Size: 1/4" Diameter to 3" Diameter

       

Alloy 800 (UNS N08800) Chemical Composition, %

Alloy 800H (UNS N08810) Chemical Composition, %

Alloy 800HT (UNS N08811) 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.

In what applications is Incoloy 800H/HT used?

• 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
• Heat exchangers and process piping
• Carburizing fixtures and retorts
• Furnace components
• Electric range heating-element sheathing
• Extruded tubing for ethylene and steam methane reforming furnaces
• Ammonia effluent coolers.

       

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 information on machining, click here.

ASTM Specifications

Mechanical Properties
Typical room temperature Tensile Properties of Annealed Material

Capabilities

• Same Day/ Next Day Shipping
• Fast and Reliable Delivery Services
• Stocking Program for Long Term Contract
• Just In Time Program and Consignment Program
• Worldwide Supplier to Fortune 500 Companies
• Small and Medium-Sized Businesses
• US Government Agencies

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