Incoloy 800H EN 1.4958 Alloy 800H Nickel Base Alloy Plate Sheets and Coils Hot Rolled & Cold Rolled

Incoloy 800H (UNS N08810 / W.Nr. 1.4958)

Incoloy 800H (UNS N08810 / W.Nr 1.4958) is an iron-nickelchromium alloy having the same basic composition as Incoloy 800, with significantly higher creep rupture strength. The higher strength results from close control of carbon, aluminum and titanium contents in conjunction with a high temp anneal. The 800H modification was to control carbon (0.05 to 0.10%) and grain size to (>ASTM 5) to optimize stress rupture properties. Incoloy 800H has further modifications to the combined titanium and aluminum levels (0.85 to 1.2%) to ensure optimum high temperature

properties.

Features

• Resistance to prolonged exposure to elevated temperatures
• Excellent resistance to oxidation, sulfidation, and carburization
• Added Carbon and annealing treatment allows for higher creep and rupture properties above 600℃
• Resistant to high temperature corrosion
• Readily machined by standard methods
• Best joined/welded using products for high temperature situations
• Resistance to aqueous corrosion at moderate temperatures

Applications

• Chemical and Petrochemical Processing—process equipment for the production of ethylene, ethylene dichloride, acetic anhydride, ketene, nitric acid and oxyalcohol
• Petroleum Refining—steam/hydrocarbon reformers and hydrodealkylation units
• Power Generation—steam super-heaters and high temperature heat exchangers in gas-cooled nuclear reactors, heat exchangers and piping systems in coal- fired power plants

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