Nickel AlloysAlloy 800

A nickel-iron-chromium alloy that is metallurgically stable in long term applications at high temperatures.

Alloy 800 is a Ni-Cr-Fe alloy containing small additions of aluminium and titanium. It is an austenitic heat resistant alloy designed for high temperature structural applications. The strength of 800H/AT is achieved by controlled levels of carbon, aluminum and titanium along with a 1148°C minimum anneal to achieve a grain size of ASTM 5 or coarser. The alloy is not hardenable by heat treatment but cold working can provide enhanced mechanical properties.

For severe service environments, nickel alloys come into their own offering far superior mechanical properties and corrosion resistance than many other corrosion resistant alloys. Depending on the application, alloys can be selected to give excellent performance over a wide range of temperatures, operating environments and media where strength and corrosion resistance are critical.

Marine engineering, chemical and petrochemical processing and the oil & gas industry all benefit from the use of these alloys in diverse components from valves through fasteners to drill collars.

Talk to an expertDownload PDF

Range Enquiry

To enquire about our range or your specific requirements, please contact your local service centre.

Related Specifications

  • UNS N08800 : ASTM B564


Chemical Composition


  • Super-heaters and re-heater tubing
  • Power generation
  • Heat exchangers
  • Pressure vessels
  • Dampers
  • Industrial furnaces
  • Hydrocarbon plants


  • Excellent high temperature strength
  • Oxidation, carburization and sulfidation resistance
  • Good creep-rupture properties
  • Metallurgical stability in long-term applications at high temperatures

Find your local Service Centre

An extensive UK network of Service Centres, backed up by a central distribution facility.

  • Experienced multi-product specialists

  • In-house state of the art processing facilities

  • Large fleet of bespoke delivery vehicles

RBL Truck Retouched