Alloy 800H Tubing

Description

Alloy 800 and the similar 800H and 800HP are popular in the construction and manufacture of equipment that requires high strength while resisting corrosion, oxidation, carburization and other detrimental effects of high-heat exposure. Alloy 800HP offers optimal creep and rupture characteristics in high-heat applications. A high nickel content ensures ductility and improves resistance to scaling, corrosion and stress corrosion cracking. Chromium helps resist oxidation and corrosion, and iron helps combat internal oxidation.

Design features

  • Good creep-rupture characteristics above 1110° F (599° C)
  • No lost ductility during long-term use below 1290° F (699° C)
  • Achieve higher temperatures with 800HP and its increased aluminum and titanium content
  • Metallurgical stability in high-temperature, long-term applications
  • Resistance to nitriding and oxidizing atmospheres, as well as those that fluctuate between oxidizing and reducing conditions

Applications

  • Coal conversion plant components, including piping systems and heat exchangers
  • Steam/hydrocarbon reforming components, including:
    • Pig tails
    • Headers
    • Manifolds
    • Transfer piping
    • Catalyst tubes
    • Collectors
    • Quench system piping
  • Ethylene pyrolysis tubing in radiant and convection sections
  • Ethylene dichloride cracking tubes
  • Steam generator tubing in high-temperature, helium coolant reactor systems
Product Type Size Range Wall/Pressure Class
Seamless Tubing 1/4” through 1” .035, .049, .065, .083, .095, .109, .120

Alloy 800 H Chemical Composition %

C Cr Fe Ni Al Ti AL/Ti
    MIN        
0.06-.10 19.0-23.0 39.5 30.0-35.0 .15-.60 .15-.60 .85-1.20

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