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Nickel-iron-chromium alloys are designated by the UNS N04400 designation. UNS N04400 is a nickel-based alloy that can endure temperatures of up to 1100 degrees Fahrenheit (593 degrees Celsius). When creep and rupture resistance are required at temperatures above 1100°F (593°C), UNS N04400 alloys are annealed to generate regulated grain size for the greatest performance in this temperature range. UNS N02200 is a nickel-iron-chromium-tungsten alloy used for creep and rupture resistance at temperatures above 1100°F (593°C). In this temperature range, it is annealed to acquire the best properties.
Chemical Composition
| UNS |
Element |
Composition, % |
| Ni |
Cu |
Fe |
Mn |
C |
Si |
S |
| UNS N04400 |
Ni Cu Alloy |
63.0B min |
28.0-34.0 |
2.5 |
2.0 |
0.3 |
0.5 |
0.024 |
Mechanical Properties
| Material and Condition |
Maximum Section Thickness, in. (mm) |
Tensile Strength, min, ksi (MPa) |
Yield Strength, 0.2 % Offset, min, ksi (MPa) |
Elongation in 2 in. or 50 mm or 4D, min, % |
| Nickel-copper alloy UNS N04400, annealed |
... |
70 (483) |
25 (172) |
35 |