ASTM B409 Incoloy 800 Suppliers, Alloy 800 UNS N08800 Stockists

Incoloy 800 Price Per Kg

Incoloy 800 Composition

INCOLOY® 800H / 800HT®

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

Other common names: Alloy 800, Alloy 800H, Inconel® 800, Alloy 800HT

In what forms is Incoloy® 800H/HT available at Steel Tubes India?

• 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

Alloy 800 (UNS N08800) Chemical Composition, %

Alloy 800H (UNS N08810) Chemical Composition, %

Alloy 800HT (UNS N08811) Chemical Composition, %

Mechanical Properties
Typical room temperature Tensile Properties of Annealed Material

Incoloy 800 Melting Point

Incoloy 800 / 800H / 800HT Melting Point

Incoloy 800 Equivalent

Incoloy 800/ 800H/ 800HT Equivalent

ASTM Specifications

Alloy 800H/800HT (/ W.Nr. 1.4958 & 1.4959) are solid solution strengthened, iron- nickel-chromium alloys, typically offered as one, dual certified alloy meeting the elemental requirements of both alloys. The principle difference between alloy 800H and 800HT® material is the restricted aluminum and titanium content in 800HT®, which results in higher creep and stress rupture properties. Both Alloy 800H and 800HT® are superior to Alloy 800 (UNS N08800), having greater creep and stress rupture properties. The alloy is typically used for applications involving long-term exposure to high-temperatures where resistance is needed from oxidation, carburization and other types of high-temperature corrosion. Hydrocarbon processing, heat-treat furnaces and power generation are some of the most common applications where 800H & 800HT® is utilized. Pressure vessels and vessel components constructed from 800H and 800HT® are approved under the ASME, Boiler and Pressure Vessel Code, Section VIII, Division 1.

• Resistance to Corrosion
High nickel and chromium contents in both alloy 800H and 800HT® result in excellent resistance to oxidation, carburization and sulfidation. The high nickel content also increases the resistance to nitriding, although not as good as other alloys such as Alloy 600, which contains a higher percentage of nickel.

• Fabrication and Heat Treatment
Hot-working temperatures should be between 1600°F and 2200°F with heavy forming to be performed at temperatures above 1850°F. No forming should be performed between 1200°F and 1600°F and preheating of tools and dies to 500°F is suggested to avoid chill. Cooling after hot working should be as quick as possible, avoiding extensive time at temperatures between 1000°F and 1400°F. Cold working should be performed on material in the annealed condition. Stress relief or annealing should be considered depending on the total amount of strain induced by fabrication taking into consideration the intended service of the material.