VDM® Alloy 800 HP (1.4959/N08811)

VDM® Alloy 800 HP is an austenitic nickel-iron-chromium alloy with increased content of (Al + Ti), compared to VDM® Alloy 800 H. VDM® Alloy 800 H is an austenitic, heat resistant iron-nickel-chromium alloy with controlled levels of carbon, aluminum and titanium.

Characteristics of VDM® Alloy 800 HP

VDM® Alloy 800 HP (1.4959/N08811) is chracterized by:

  • excellent creep rupture strength at temperatures above 700 °C (1,290 °F)
  • good resistance to reducing, oxidizing and nitriding atmospheres and to atmospheres which alternate between reducing and oxidizing conditions
  • metallurgical stability in long-term use at high temperatures

A special solution annealing results in a grain sizes ≥ 90 μm (ASTM No. 4) and highest creep rupture strength above 700 °C (1,290 °F) due to titanium carbide precipitation. Below 700 °C (1,290 °F), γ' precipitates combined with a loss of ductility.

Power plant

Applications of VDM® Alloy 800 HP

VDM® Alloy 800 HP has a wide range of applications in areas of elevated temperatures in furnace construction, in the chemical industry, in environmental protection equipment, in the automotive industry and in power plants. Typical applications include furnace muffles, containers, bins, holders in various heat treatment plants and burner components.

Because of their resistance to carburization and nitriding, the alloys are furthermore used in the areas of:

  • Steam/hydrocarbon reformers
  • Ethylene pyrolysis
  • Equipment for acetic anhydride and ketone production

Available product forms

You will find a detailed list about available product forms and sizes of VDM® Alloy 800 HP (1.4959/N08811) in our data sheet. 

Do you have any questions? Please contact us!

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