Inconel 718 is a precipitation-hardening nickel-chromium alloy that contains significant amounts of iron, columbium (niobium), and molybdenum, as well as smaller amounts of aluminum and titanium. Here are some key features and properties of Inconel 718:
High Strength and Ductility:
Inconel  718 maintains high strength and good ductility at temperatures up to 1300°F (704°C).
This makes it suitable for applications where both strength and toughness are required, even at elevated temperatures.Weldability and Formability:Inconel 718 exhibits relatively good weldability and formability compared to other precipitation-hardening nickel alloys.It can be readily welded without significant hardening or cracking.Cryogenic Properties:The alloy possesses excellent cryogenic properties, making it suitable for applications that require resistance to low-temperature environments.Corrosion and Oxidation Resistance:Inconel 718 maintains good corrosion resistance and oxidation resistance.It is used in applications requiring resistance to creep, stress rupture (up to 1300°F/704°C), and oxidation (up to 1800°F/982°C).
Non-Magnetic:Inconel 718 is non-magnetic, which can be advantageous in certain applications.Inconel 718 is commonly used in industries such as aerospace, oil and gas, and chemical processing. It finds applications in components such as turbine blades, rocket motors, gas turbine discs, and cryogenic storage tanks.
It's important to note that while Inconel 718 offers many desirable properties, it may have limitations in certain corrosive environments. 
Therefore, it's essential to consider specific operating conditions and consult with materials engineers or alloy manufacturers for precise guidance on its suitability, fabrication, and compatibility in particular applications and environments.

General Properties

Nickel 718 (UNS N07718), also known as Inconel 718, is a precipitation-hardening nickel-chromium alloy. It contains molybdenum, iron, columbium (niobium), and smaller amounts of aluminum and titanium. Here are some key features and properties of Nickel 718:High Strength and Ductility:Nickel 718 exhibits significant yield strength, high strength, and good ductility.It maintains these properties at elevated temperatures, up to 1300°F (704°C).Formability and Weldability:Nickel 718 offers good formability and weldability compared to other nickel-based superalloys.This makes it easier to shape and join in various manufacturing processes.Cryogenic Allowances:The alloy possesses good cryogenic properties, enabling its use in low-temperature environments.Age Hardening Characteristics:The sluggish age hardening characteristics of Nickel 718 allow for annealing and welding without spontaneous hardening during heating and cooling.Non-Magnetic:Nickel 718 is non-magnetic, which can be advantageous in certain applications.Corrosion and Oxidation Resistance:The alloy maintains significant corrosion resistance and oxidation resistance.It can withstand harsh environments and is suitable for applications requiring such resistance.Nickel 718 is commonly used in the aerospace industry for applications such as jet engines, airframe components, high-temperature bolts, and fasteners. Its combination of strength, ductility, and resistance to corrosion and oxidation makes it well-suited for these demanding applications.It's important to note that while Nickel 718 offers many desirable properties, it may have limitations in certain corrosive environments. Therefore, it's essential to consider specific operating conditions and consult with materials engineers or alloy manufacturers for precise guidance on its suitability, fabrication, and compatibility in particular applications and environments.

Chemical Composition

Inconel 718 is made up primarily of nickel (52%). Alloying elements include Iron (19%), Chromium (18%), Columbium+ Tantalum (5%), Molybdenum (3%), Titanium (0.9%), Aluminum (0.5%) with the addition of other elements in trace amounts such as Baron, Cobalt, Copper, Manganese and Silicon.
UNS: N07718 / TYPE: 718 

Physical Properties

Inconel 718 features a melting point of 2300°c and possesses impressive tensile strength that lends itself well to the wide variety of industrial applications it is involved in such as fasteners, high-strength bolts and nuclear fuel element spacers to name but a few. This is further aided by the alloy's excellent performance in properties such as weldability and creep-rupture.

Mechanical Composition

Inconel 718 features a melting point of 2300°c and possesses impressive tensile strength that lends itself well to the wide variety of industrial applications it is involved in such as fasteners, high-strength bolts and nuclear fuel element spacers to name but a few. This is further aided by the alloy's excellent performance in properties such as weldability and creep-rupture.