Incoloy 800（UNS N08800、0Cr20Ni32AlTi、NCF800、X2NiCrAlTi3220）
1.Composition(wt%)
|
Ni
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Cr
|
Te
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C
|
Mn
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Si
|
Cu
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S
|
Al
|
Ti
|
|
30.0~35.0
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19.0~23.0
|
balance
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≤ 0.10
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≤ 1.5
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≤ 1.0
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≤ 0.75
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≤ 0.015
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0.15~0.60
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0.15~0.60
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2.Physical Properties
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Density
(g/cm3)
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Melting point
(℃ )
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Elastic modulus
( MPa)
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Thermal conductivity
( λ/(W(m•℃) )
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Thermal expansion coefficient
( 24 -100°C)( m/m °C)
|
Operating temperature
(°C )
|
|
7.95
|
1350-1400
|
196
|
1.28
|
14.2
|
-200 ~ +1,100
|
3.Mechanical Properties at room temperature
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Tensile strength
(MPa)
|
Yield strength
(MPa)
|
Elongation
(%)
|
|
≥500
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≥210
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≥35
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4.Structure
Face-centered cubic lattice structure.
Very low carbon content and elevated Ti: C ratio have increased the stability of the structure
And the largest sensitization resistance and resistance to intergranular corrosion.
At around 950 ℃ low temperature annealing guarantees the fine crystal structure.
5.Characteristics
1.Excellent corrosion resistance in aqueous media at high temperature up to 500 ℃.
2.Good resistance to stress corrosion performance:
Resistance to a lot of corrosion media.
Very good resistance to stress corrosion cracking property in the aqueous corrosion condition for the high nickel content.
Better resistance to pitting corrosion and crevice corrosion cracking property for high chromium content.
Good nitric acid, organic acid, corrosion resistance, but the corrosion resistancein sulfuric acid and hydrochloric acid is limited.
In addition to the possible corrosion in halide, it has good corrosion resistancein the oxidizing and non
oxidizing salt, the same as in the water, steam and steam, air, carbon dioxide mixture.
3. Very good processability.
6.Applications
1. Nitric acid condenser —nitric acid corrosion resistance;
2.Steam heating tube —very good mechanical properties;
3. The heating element —very good mechanical properties。
To apply to as high as 500 ℃ environment, alloy supply state for annealed state.
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