Inconel

Inconel is nickel-based super alloys.

Inconel alloy 600 is 72% nickel, 16% chromium, and 8% iron. Other forms of inconel exist, each with slightly different additions. e.g. Inconel alloy 750 has a small percentage of titanium and aluminum added for hardenability (600 is not hardenable by heat treatment). Inconel is highly oxidation and corrosion resistant, even at very high temperatures, and retains a high mechanical strength under these conditions as well.

Thus, it is often used in extreme conditions, such as aircraft engine parts, turbocharger turbine wheels, chemical processing and pressure vessels.

Other versions of Inconel resist acid and other aggressive conditions such as Ni-20Cr-16Mo-4W Inconel alloy 686. Inconel alloy 718Inconel alloy 718 is a high-strength, corrosion-resistant nickel chromium material used at -253°C to 700°C (-423°F to 1300°F).

The age-hardenable alloy can be readily fabricated, even into complex parts. Its welding characteristics, especially its resistance to post weld cracking, are outstanding. The ease and economy with which INCONEL alloy 718 can be fabricated, combined with good tensile, fatigue, creep, and rupture strength, have resulted in its use in a wide range of applications.

Examples of these are components for liquid fueled rockets, rings, casings and various formed sheet metal parts for aircraft and land-based gas turbine engines, and cryogenic tank age. It is also used for fasteners and instrumentation parts. Corrosion resistance

INCONEL alloy 718 has excellent corrosion resistance to many media. This resistance, which is similar to that of other nickel-chromium alloys, is a function of its composition. Nickel contributes to corrosion resistance in many inorganic and organic, other than strongly oxidizing, compounds throughout wide ranges of acidity and alkalinity.