AVAILABILITY
Seamless Pipe 1/2" - 8"
Welded Pipe 8" - 12"
Butt-Weld Fittings 1/2" - 8"
Flanges 1/2" - 8"
Bar 1" - 6"
SPECIFICATIONS
ASTM B407, B514, B366, B408, B564
ASME SB407, SB514, SB366, SB408, SB564
DESCRIPTION
Alloy 800 is a widely used material of construction for equipment
that must resist corrosion, have high strength or resist oxidation,
carburization and other harmful effects of high-temperature exposure.
For high temperature applications requiring optimum creep and rupture
properties Alloy 800HP is used. The Chromium in the alloy imparts
resistance to oxidation and corrosion. The high Nickel content maintains
an austenitic structure so that the alloy is ductile. The Nickel also
contributes resistance to scaling, general corrosion and stress corrosion
cracking. The iron content provides resistance to internal oxidation.
DESIGN
FEATURES
Good creep-rupture properties at temperatures above 600 deg. C (1110
deg.F) without loss of ductility during long term use at temperatures
below 700 deg. C (1290 deg.F), due to limitation of (Ti & A) content
to max 0.7%. However, by using 800HP with increased (Al & Ti)
content to 1.2%, temperatures above 700 deg. C (1290 deg.F) can be
achieved.
Good resistance to reducing oxidizing and nitriding atmospheres and
to atmospheres which alternates between reducing and oxidizing conditions.
Metallurgical stability in long-term applications at high temperatures.
TYPICAL APPLICATIONS
Steam / hydrocarbon reforming for components such as pig tails, headers,
collectors, manifolds, transfer piping, catalyst tubes, and quench
system piping
Ethylene pyrolsis tubing in convection and radiant sections - resistance
to carburization and good mechanical properties
Ethylene dichloride cracking tubes - resistance to carburization and
to dry hydrogen chloride and chlorine
Components, eg. Heat exchangers, piping systems, etc... in coal conversion
plants
Steam generators tubing in helium coolant, high temperature reactor
systems - high strength, resistance to helium and steam
TENSILE REQUIREMENTS
Tensile Stength (KSI) 72.5
Yield Strength (KSI) 25
KSI can be converted to MPA (Megapascals) by multiplying by 6.895.
info section