Alloy 800 series (Inconel 800, 800H and 800HT) are nickel-iron-chromium super-alloys that offer high temperature strength and resistance to oxidation, carburization and other types of high-temperature corrosion. Alloy 800 (UNS N08800), Alloy 800H (UNS N08810) and Alloy 800AT (UNS N08811) have the same content of Nickel, Chromium and iron, what makes the difference is the combined titanium and aluminum levels (0.85 to 1.2%) to ensure optimum high temperature properties.
Inconel 800 Specifications:
Sheet / Plate / Strip: AMS 5871, ASTM A 240/A 480, ASTM B 409, ASTM B 906
Seamless Pipe / Tube: ASTM B 407, ASTM B 829
Welded Pipe / Tube: ASTM B 515
Round / Flat bar: ASTM B 408, ISO 9723
Fittings: ASTM B 366, ASME SB-366
Forgings: AMS 5766, ASTM B564
Chemical Composition:
|
Alloy |
Ni |
Cr |
Fe, min |
C, max |
Al |
Ti |
Al+Ti |
|
Alloy 800 |
30-35 |
19-23 |
39.5 |
0.10 |
0.15-0.60 |
0.15-0.60 |
0.30-1.20 |
|
Alloy 800H |
30-35 |
19-23 |
39.5 |
0.05-0.10 |
0.15-0.60 |
0.15-0.60 |
0.30-1.20 |
|
Alloy 800HT |
30-35 |
19-23 |
39.5 |
0.06-0.10 |
0.25-0.60 |
0.25-0.60 |
0.85-1.20 |
Mechanical Properties:
| Density, g/c㎡ | 7.94 |
| Melting range, ℃ | 1357-1385 |
| Tensile strength, min, Mpa | 550 |
| Yield strength, 0.2% offset, min, Mpa | 240 |
| Elongation, %, min | 30 |
| Hardness, Rockwell | / |
Applications:
Inconel 800 series is mainly used in chemical processing and nuclear power industrial:
- Industry radiant tubes, return bends, muffles, retorts and furnace fixtures
- Petrochemical furnace cracker tubes
- Hydrocarbon Processing Industry catalyst tubing, convection tubing, outlet manifolds and quenching system piping
- Power Generation Industry steam superheating tubing, high-temperature heat exchangers