Inconel 718
Inconel 718 possesses the resistance to corrosive elements that are common among Inconel alloys. However, Inconel 718 differs from other alloys in its "family" in structure and response. 718 is a precipitation-hardenable nickel-chromium alloy. It contains substantial levels of iron, molybdenum, and niobium as well as trace amounts of titanium and aluminum.
Its makeup allows for an ease of welding that is not matched by the majority of Inconel alloys. It also allows Inconel 718 to combine anti-corrosive elements with a high level of strength and flexibility. Inconel 718 is particularly resistant to post-weld cracking, and it can maintain its structure in both high-temperature and aqueous environments. In fact, it will maintain superb creep-rupture strength at temperatures as high as 1,300?F.
The unique qualities of Inconel 718 have caused it to be used in industries and applications where other Inconel alloys simply would not be effective. You will find it in nuclear reactors, spacecraft, and rocket motors. However, it does have more common applications, as well. It can be very effective in tooling and gas turbines. There is also a version of the alloy (718 SPF) that is used specifically for super-plastic forming.