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Inconel 718 Sheet Plate – Composition, Properties and Uses

Inconel 718 Sheet Plate

Inconel 718 is a high-temperature alloy commonly used in the aerospace, automotive, and oil and gas industries. This alloy has exceptional strength, corrosion resistance, and high-temperature properties. In this blog post, we’ll discuss the composition, physical and mechanical properties, heat treatment, corrosion resistance, and uses of Inconel 718 sheet plates.


Inconel 718 Sheet Plate Composition

Inconel 718 Sheets & Plates is a nickel-chromium alloy that also contains small amounts of several other elements, including molybdenum, titanium, niobium, aluminum, and iron. Combining these elements results in an alloy that can withstand high temperatures and has excellent corrosion resistance. Inconel 718 sheet plate typically has a composition of 50.5% nickel, 18.6% chromium, 3.05% molybdenum, 0.9% titanium, 5.1% niobium, 0.5% aluminum, and 21.3% iron.

Grade C Mn Si S Cu Fe Ni Cr
718 0.08 max 0.35 max 0.35 max 0.015 max 0.30 max 50.00 – 55.00 17.00 – 21.00

Inconel 718 Sheet Plate Physical and Mechanical Properties

Nickel Alloy 718 Sheet plate has impressive physical and mechanical properties, such as high tensile, yield, and creep-rupture strength. It also has exceptional fatigue resistance and excellent welding and brazing capabilities. In terms of its physical properties, this alloy has a density of 8.19 grams per cubic centimetre, a melting point of 1,260 degrees Celsius, and a specific heat capacity of 410 Joules per kilogram per degree Celsius.

Element Density Melting Point Tensile Strength Yield Strength (0.2%Offset)
8.2 g/cm3 1350 °C (2460 °F) Psi – 1,35,000 , MPa – 930 Psi – 75,000 , MPa – 482 45 %

Inconel 718 Sheet Plate Heat Treatment

UNS N07718 sheet plate can be treated with heat to improve its mechanical properties. The heat treatment typically involves heating the alloy to a high temperature and then cooling it rapidly in water or oil. This process, called quenching, hardens the alloy and improves its strength and toughness. Another heat treatment process, called age hardening or precipitation hardening, involves holding the alloy at an elevated temperature to promote the growth of small, uniformly distributed particles within the alloy matrix. This process results in even higher strength and hardness.

Inconel 718 Sheet Plate Corrosion Resistance

UNS N07718 Plate is highly corrosion-resistant in many environments, including seawater, atmospheric conditions, and high-temperature gases. This corrosion resistance is due to the protective oxide layer that forms on the alloy’s surface, which helps prevent further corrosion. The alloy’s high nickel and chromium content also make it highly resistant to stress corrosion cracking and pitting.

Inconel 718 Sheet Plate Equivalent

718 2.4668 N07718

Inconel 718 Sheet Plate Uses

Alloy 718 sheet plate is used in various applications, such as aerospace, automotive, and oil and gas industries. It is commonly used to manufacture high-temperature engine components, such as turbine blades, exhaust systems, and combustion nozzles. Additionally, it is used for springs, pressure vessels, and rocket engine components.



In conclusion, AMS 5596 Hot Rolled Plate is a high-temperature alloy with exceptional mechanical and physical properties and corrosion resistance in various applications. It is vital to understand its composition, physical and mechanical properties, heat treatment, corrosion resistance, and uses, especially for manufacturers, designers, or engineers who must select the right material for their high-temperature applications. Inconel 718 sheet plate is a reliable, high-performance alloy that brings value to the technological world.

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