ALLOY 800 (UNS N08800 / W. Nr. 1.4876)
Alloy 800 is a widely used material for construction of equipment requiring corrosion resistance, heat resistance, Strength, and stability for service up to 816° C. Alloy 800 offers general corrosion resistance to many aqueous media and, by virtue of its content of nickel, resists stress corrosion cracking. At elevated temperatures it offers resistance to oxidation, carburization, and sulfidation along with rupture and creep strength. For applications requiring greater resistance to stress rupture and creep, especially at temperatures above 816° C, Alloys 800 and 800HT are used. The chromium in the alloy imparts both aqueous and heat resistance. Iron provides resistance to internal oxidation. The nickel content maintains a ductile, austenitic structure. Thus, alloy 800 is readily formed, welded, and machined
- Resistance to chloride stress-corrosion cracking.
- Good sensitization in most high-temperature applications.
- Resistance of oxidation, carburization, and sulfidation along with rupture and creep strength.
Applications of ALLOY 800 (UNS N08800 / W. Nr. 1.4876):
Chemical and petrochemical processing - heat exchangers and other piping systems in nitric acid.
Nuclear - steam generator tubing.
Petroleum processing - heat-exchanger tubing.
Paper pulp - digester liquor heaters.
|Alloy 800||30.0-35.0||19.0-23.0||Min 39.5||Max 0.10||Max 1.50||Max 0.015||Max 1.0||Max 0.75||0.15-0.60||0.15-0.60|
|Alloy 800||7.94g/ cm3||1357°C-1385 °C|
|Tensile Strength||Yield Strength||Elongation|
|Alloy 800||520 N/mm²||205 N/mm²||30%|