Inconel 617 Alloy
General Characteristics of Inconel 617 Alloy
This is a high temperature nickel-chromium-cobalt-molybdenum alloy that is both corrosion and oxidation resistant.
The alloy’s uses include gas turbine engine ducting and combustion liners. Alloy 617 also finds uses in chemical processing due to its resistance to a wide range of aqueous corrosive media.
The alloy works well and forging may be carried out between 2200/1850ºF (1010/1205ºC), with lighter reductions possible down to 1700ºF (925ºC).
There are two basic heat treatments for this alloy. For applications involving high service temperatures, parts are solution annealed at 2050/2150ºF (1120/1180ºC) followed by air cooling, or more rapid cooling.
For intermediate heat treatments between cold-forming operations, where a finer grain size is required, parts are annealed at 1900ºF (1040ºC). This alloy has a high work hardening rate. Hence process annealing is required between large cold-work reductions.
The alloy may be readily machined providing low speeds and positive feeds are used, together with rigid tooling and heavy equipment.
The alloy may be welded by gas-shielded processes, using either tungsten or consumable electrodes. Post-weld heat treatment is not necessary.
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