Incoloy 800H

Update : 2026-02-25

Incoloy 800H
Incoloy 800H is a nickel‑iron‑chromium alloy with controlled carbon and aluminum content, designed for enhanced high‑temperature creep strength. It offers excellent oxidation, carburization, and sulfidation resistance, along with stable mechanical properties under long‑term elevated temperature service. It features good formability, weldability, and structural stability in thermal cycling environments. With superior creep‑rupture strength compared to standard Incoloy 800, it is widely used in high‑temperature pressure parts and industrial furnace components.
Equivalent Grade

UNS: N08810

W.Nr.: 1.4876 (Grade H)

Chinese Standard: GH3039

Standard

● Sheet/Plate: ASTM B409

Seamless Pipe: ASTM B407

Bar: ASTM B408

Alloy TypeNickel-Chromium-Iron Alloy (High-Temperature Heat and Corrosion Resistant Type, Grade H Strengthened)
StandardSheet, Bar, Pipe, Tube, Fittings, Flange, Welding Products, etc.
Key Properties

● Higher high-temperature strength than Incoloy 800, outstanding creep performance at 600-800℃

Excellent oxidation, carburization and nitridation resistance, stable service under long-term high temperature

Resistant to steam and high-temperature flue gas corrosion, excellent hot and cold forming and weldability

Applicable EnvironmentHigh-temperature oxidizing/reducing environment, high-temperature heat exchange scenarios, heat treatment furnaces, steam boilers, chemical high-temperature reaction scenarios, oil and gas high-temperature processing scenarios
Typical ApplicationsHigh-Temperature Heat Exchangers, Boiler Superheater/Reheater Tubes, Heat Treatment Furnace Liners, Chemical Reactors, Oil And Gas Processing Equipment, High-Temperature Pipes, Power Station High-Temperature Components, etc.


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