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Sandmeyer Nickel Alloy 800HT

Família genérica: Nickel - Wrought - Ni-Fe-Cr AlloyFornecido por: Sandmeyer Steel Company
Alloys 800H (UNS N08810) and 800HT (UNS N08811) are dualcertifiable Nickel-Iron-Chromium materials that resist oxidation, carburization and other high temperature corrosion. The chemical composition of the two alloys are identical to Alloy 800 (UNS N08800), with the exception of the higher level of carbon present in both grades - (0.05 - 0.10%) in alloy 800H, and (0.06 - 0.10%) in alloy 800HT. Alloy 800HT also has an addition of up 1.0 % aluminum and titanium. In addition to the chemistry restrictions, both alloys receive a high temperature annealing treatment that produces an average grain size of ASTM 5 or coarser. The restricted chemical compositions, combined with the high temperature anneal, assure these materials have greater creep and rupture strength when compared to Alloy 800.

Alloy 800H has good creeprupture properties at temperatures above 1100°F (600°C). It remains ductile during long term use at temperatures below 1290°F (700°C) due to a maximum titanium and aluminum content of 0.7%. Alloy 800 with a standard anneal is recommended for service below 1100°F (600°C). Alloy 800H resists reducing, oxidizing and nitriding atmospheres, as well as, atmospheres that alternate between reducing and oxidizing. The alloy remains stable in long term high temperature service.

Alloy 800HT has excellent creep strength at temperatures above 1290°F (700°C). If the application involves frequent temperature excursions under 1290°F (700°C) or parts of are permanently exposed to a temperature below 1290°F (700°C), Alloy 800H should be utilized. The high temperature resistance of Alloy 800HT is comparable to Alloy 800H. It also remains stable in long term high temperature service. Alloys 800H and 800AT are easily welded and processed by standard shop fabrication practices.

Applications
  • Chemical and Petrochemical Processing - process equipment for the production of ethylene, ethylene dichloride, acetic anhydride, ketene, nitric acid and oxy-alcohol
  • 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
  • Thermal Processing Fixtures - radiant tubes, muffles, retorts and fixtures for heat-treating furnaces
Propriedades gerais

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Status do material
Commercial: Active
Documentos
description

Technical Datasheet (English)

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Disponibilidade
Africa & Middle East, Asia Pacific, Europe, Latin America, North America
Outras propriedades
Applicable Specifications, Forms Available, Metal Type, Alloy Identification, Type Analysis, Density, Tensile Strength (Ultimate), Tensile Strength (Yield), 0.2%, Tensile Elongation (Break), Hardness, Tensile Modulus, Mean Specific Heat, Mean CTE, Thermal Conductivity, Electrical Resistivity
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Processamento

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