Type
Analysis
|
Incoloy
|
Incoloy 800
|
Incoloy 800H
|
|
Element
|
Min
|
Max
|
Min
|
Max
|
|
Nickel + Cobalt
|
30.0
|
35.0
|
30.0
|
35.0
|
|
Cobalt
|
---
|
2.00
|
---
|
2.00
|
|
Chromium
|
19.0
|
23.0
|
19.0
|
23.0
|
|
Copper
|
---
|
0.75
|
---
|
0.75
|
|
Iron
|
Bal
|
Bal
|
|
Silicon
|
---
|
1.00
|
---
|
1.00
|
|
Manganese
|
---
|
1.50
|
---
|
1.50
|
|
Carbon
|
---
|
0.10
|
0.05
|
0.10
|
|
Aluminum
|
0.15
|
0.60
|
0.15
|
0.60
|
|
Titanium
|
0.15
|
0.60
|
0.15
|
0.60
|
|
Sulfur
|
---
|
0.015
|
---
|
0.015
|
Description
Alloy 800 is an iron-nickel-chromium
alloy with moderate strength and good resistance to oxidation and
carburization at elevated temperatures. It is particularly useful for
high-temperature equipment in the petrochemical industry because the
alloy doesn't form the embrittling sigma phase after long time
exposure at 1200°F (649°C). Excellent resistance to chloride
stress-corrosion cracking is another important feature of alloy
800.
Alloy 800H is a solution heat treated (2100°F/1150°C),
controlled-carbon version of alloy 800 with improved elevated
temperature properties. It has improved creep and stress-rupture
characteristics in the 1100°F (593°C) to 1800°F (982°C)
temperature range.
Applications
Typical applications for alloy 800
and 800H are - Heat exchangers and process piping; carburizing
fixtures and retorts; furnace components; electric range
heating-element sheathing; extruded tubing for ethylene and steam
methane reforming furnaces; ammonia effluent coolers.
Physical
Properties
|
Physical
Properties
|
°F
|
British
Units
|
°C
|
Metric
Units
|
|
Density
|
Room
|
0.287 lb./in.(3)
|
Room
|
7.95 g/cm(3)
|
|
Electrical
Resistivity
|
70
200
400
600
800
|
38.9
microhm-in.
40.6 microhm-in.
43.0 microhm-in.
44.7
microhm-in.
46.1 microhm-in.
|
21
93
204
316
427
|
0.989 microhm-m
1.03
microhm-m
1.09 microhm-m
1.13 microhm-m
1.17 microhm-m
|
|
Mean
Coefficient
of Thermal
Expansion
|
70-200
70-400
70-600
70-800
|
7.9
microin./in.-°F
8.8 microin./in.-°F
9.0
microin./in.-°F
9.2 microin./in.-°F
|
21-93
21-204
21-316
21-427
|
14.2 X
10(-6)m/m-K
15.8 X 10(-6)m/m-K
16.2 X 10(-6)m/m-K
16.6 X
10(-6)m/m-K
|
|
Thermal
Conductivity
|
70
200
400
600
800
|
80
Btu-in/ft²-hr-°F
89 Btu-in/ft²-hr-°F
103
Btu-in/ft²-hr-°F
115 Btu-in/ft²-hr-°F
127
Btu-in/ft²-hr-°F
|
21
93
204
316
427
|
11.5 W/m-K
12.8
W/m-K
14.8 W/m-K
16.6 W/m-K
18.3 W/m-K
|
|
Dynamic
Modulus
of Elasticity
|
Room
|
28.5 x 10(6) psi
|
Room
|
196 GPa
|
These properties apply
to both alloys
Mechanical
Properties
|
Alloy
|
Form
|
Condition
|
Ultimate
Tensile
Strength,
ksi
(MPa)
|
Yield
Strength
at
0.2%
offset,
ksi (MPa)
|
Elongation
in
2"
or 4D, percent
|
|
800
|
Sheet, Plate
|
Annealed
|
85 (586)
|
40 (276)
|
43
|
|
800
|
Sheet, Plate
Strip,
Bar
|
Annealed
|
75 (520)*
|
30 (205)*
|
30*
|
|
800H
|
Sheet,
Plate
|
SHT
|
80
(552)
|
35
(241)
|
47
|
|
800H
|
Sheet,
Plate
Strip, Bar
|
SHT
|
65
(450)*
|
25
(170)*
|
30*
|
* - minimum
SHT -
Solution heat-treated
|
