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┃ Material
UNS N06617, Alloy 617, W.Nr. 2.4663
┃ Overview
Alloy 617 is a solid-solution, strengthened, nickel-chromium-cobalt- molybdenum alloy with an exceptional combination of high-temperature strength up to 1100°C (2000°F) due to solid solution hardening and oxidation resistance. The alloy also has excellent resistance to a wide range of high temperature corrosion such as oxidation and carburization, and it is readily formed and welded by conventional techniques.
The high nickel and chromium contents make the alloy resistant to a variety of both reducing and oxidizing media. The aluminum, in conjunction with the chromium, provides oxidation resistance at high temperatures. Solid-solution strengthening is imparted by the cobalt and molybdenum.
Alloy 617 is characterized by:
● Very good short-term and long-term mechanical properties up to 1100 °C (2000 °F)
● Excellent resistance to oxidation up to 1100 °C (2000 °F)
● Excellent resistance to carburization up to 1100 °C (2000 °F)
● Good weldability
┃ Application
The combination of high strength and oxidation resistance at temperatures over 1800°F (980°C) makes alloy 617 an attractive material for such components as ducting, combustion cans, and transition liners in both aircraft and land-based gas turbines. Because of its resistance to high-temperature corrosion, the alloy is used for scatalyt-grid supports in the production of nitric acid, for heat-treating baskets, and for reduction boats in the refining of molybdenum. Alloy 617 also offers attractive properties for components of power-generating plants, both fossil-fueled and nuclear.
┃ Chemical composition (wt%)
|
Material |
Fe |
Ni |
Co |
Cr |
Mo |
Ti |
B |
|
Alloy 617 |
≤3.0 |
≥44.5 |
10.0-15.0 |
20.0-24.0 |
8.0-10.0 |
≤0.60 |
≤0.006 |
|
Material |
C |
Al |
Mn |
Si |
Cu |
P |
S |
|
Alloy 617 |
0.05-0.15 |
0.80-1.50 |
≤1.00 |
≤1.00 |
≤0.50 |
≤0.012 |
≤0.015 |
┃ Mechanical property
(at room termperature in solution annealed condition)
|
Material |
Tensile strength MPa |
Yield strength at 0.2 offset MPa |
Elongation in 2” % min. |
Reduction of area % min. |
|
Alloy 617 |
≥665 |
≥240 |
≥35 |
|
┃ Corrosion resistance
Alloy 617 exhibits excellent resistance to hot corrosion such as oxidation and carburization under static and cyclic conditions up to temperatures of about 1100°C (2000°F).
These properties, combined with outstanding mechanical properties, make this alloy especially suitable for high temperature applications.
Additionally the high contents of nickel, chromium and molybdenum contribute to the good overall corrosion resistance of alloy 617 in a variety of aggressive media.
The composition of Alloy 617 includes substantial amounts of nickel, chromium, and aluminum for a high degree of resistance to oxidation and carburization at high temperatures. Those elements, along with the molybdenum content, also enable the alloy to withstand many wet corrosive environments.
┃ Available Process
(1) Hot formed, solution annealed, descaled
(2) Cold worked and bright annealed
(3) Cold worked, bright annealed, polished (MP, EP etc.)
┃ Common Tests
Chemical composition
Tension
Hardness
Flaring
Flange
Flattening
Micro structure
Hydrostatic
NDT
Intergranular Corrosion
Surface condition
Shape and dimension
Positive Material Identification
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