Explore the properties of Inconel 718 and discover how this superalloy can be used in different industries from aerospace to chemical processing.
Product Description:
Inconel 718 is a nickel-chromium alloy being precipitation hardenable and having high creep-rupture strength at elevated temperatures to about 700°C (1290°F). It has higher strength than most of the solid alloys, as well as good corrosion resistance in both oxidation and non-oxidation services.
Features:
- High temperature resistance
- Precipitation Hardening
- Corrosion resistant
Benefits:
- Can be used in extreme environments or during prolonged operations
- Virtually maintenance free, reducing downtime and service costs
- Ideal for use in production processes where contamination must be avoided
Description:
Inconel 718 is a nickel-chromium alloy with superior strength and heat resistance, making it a popular choice for applications requiring high performance in extreme environments. This versatile alloy has many practical uses and properties, from aerospace components to medical implants to industrial engineering.
UNS N07718, also called INCONEL 718®, is a precipitation-hardenable nickel-chromium based alloy steel. It is widely used in the aerospace, electrical, and energy industries because of its superior qualities such as excellent strength and corrosion resistance even at high temperatures. INCONEL 718® can also be easily machined and is relatively inexpensive, making it desirable in many applications.
Are you looking for a comprehensive guide to understanding Inconel 718? Learn about the properties, uses and cost of this nickel-chromium alloy today. Discover the properties of AMS 5662, IN718, AMS 5663 and more, along with information on its corrosion resistance, age hardening capabilities, mechanical properties and round bar suppliers.
Characteristics of UNS N07718.
UNS N07718 is considered a superalloy because of its excellent mechanical properties, even in extreme environments. This includes its outstanding strength ranging from 700 to 1300 MPa, high-stress rupture and creep resistance up to 650°C (1200°F), thermal fatigue resistance, fatigue crack growth rate reduction and good corrosion-resistant properties up to 700°C (1300°F). Moreover, it features high chromium and nickel content with relatively low levels of carbon and impurities making makes it ideal for many applications requiring a temperature tolerance above those reachable by other alloys.
What is Inconel 718?
Inconel 718 is a nickel-chromium based alloy with superior strength and heat resistance. It is also non-magnetic and resists oxidation and corrosion in extreme environments. Additionally, Inconel 718 has good high temperature characteristics and can be easily fabricated, making it a popular choice for use in a variety of industries.
Properties and Composition of Inconel 718
Inconel 718 is a superalloy that contains nickel, chromium, and molybdenum. Its properties include high strength, corrosion resistance in many environments, and good weldability due to its low carbon content. The material also has excellent fatigue resistance and creep-rupture strength over a wide range of temperatures. Additionally, it has excellent corrosion resistance in strong alkali media and seawater environments.
Uses for Inconel 718
Inconel 718 is used in many industries and applications, such as aerospace, automotive, petrochemical and chemical processing industry, marine engineering and cryogenic tanks. It is often used to manufacture components such as fasteners, gears, shafts, rings and housings due to its high strength properties. Additionally, this material is commonly used for gas turbine blades and afterburners as it can handle extreme temperatures.
How to Weld Inconel 718
Inconel 718 can be welded using all common welding processes. To achieve reliable, repeatable welds, it’s important to follow the manufacturer’s recommendations when selecting the welding process and technique. When welding in high heat environments, plasma arc welding is recommended to prevent oxidation of the material. Stainless steel filler rods are most commonly used in this type of application; however, other alloy filler materials may also be suitable depending on the specific metals being joined.
Advantages and Disadvantages of Inconel 718
Inconel 718 offers many advantages over other materials, including excellent strength and fatigue resistance at elevated temperatures, superior corrosion resistance, good weldability and formability, and excellent metallurgical stability. The alloy may be more expensive than other metals, and it’s more difficult to machine due to its hardness. Additionally, while the alloy is resistant to oxidation at very high temperatures, strict temperature control is still necessary when welding it in order to prevent oxidation of the material.
How to Store, Fabricate, and Protect UNS N07718 from Corrosion and Damage.
When storing and fabricating UNS N07718, it’s important to take proper precautions to prevent corrosion and mechanical damage. In order to minimize the risk of corrosion due to cladding, the steel should be stored in a clean, dry environment that is free from contaminants. It’s important to also use proper anti-spatter lubricants or coatings whenfabricating it by welding. Additionally, if an air-hardening heat treatment is going to be used it must be performed with adequate cooling and heating cycles in order for optimal performance.
Applications of Inconel 718
Inconel 718 is one of the most popular nickel-based alloys in use today. Due to its excellent strength and corrosion resistance properties, IN718 has been used in a wide range of applications, including aerospace components and other high-temperature resisting machinery. Common uses include turbine blades and discs, gas turbine seals, aircraft frames, electrical submersible pump shafts, fasteners, and cryogenic vessels.
Benefits of Using Inconel 718
Inconel 718 is a popular nickel-based alloy that offers excellent strength under high temperature and pressure conditions. It has superb creep, oxidation, and corrosion resistance properties, making it suitable for a wide variety of applications. By using IN718, manufacturers can enjoy its low manufacturing cost and the reduced risk of downtime or delays due to frequent repairs or replacements. This makes it a highly sought-after material in various industries such as aerospace, pharmaceuticals and petrochemicals.
Common Specifications for Incoloy 718
Inconel 718 is available in a wide range of grades and alloys, designed with specific properties to fit the needs of each individual application. Common specifications include UNS N07718 (AMS 5662), UNS N07818 (AMS 5663), NACE MR0175/ISO 15156, AMS 5589, AMS 5832, ASTM B637-98, AMS 5599. Its low manufacturing cost combined with its high performance makes it an ideal candidate for many industrial and commercial applications.
Around 50% of produced Inconel 718 is only used in manufacturing aircraft engines in their essential parts including blades, sheets and discs. It is also widely used in rocket engines and cryogenic applications for providing good toughness at low temperatures.
The word Inconel is an industry term coined by the International Nickel Company (INCO) to describe alloys high in nickel content, meaning Inconel is not one specific alloy. It is a group of alloys that are composed of different elements with different properties. Although not naturally magnetic, certain Inconel alloys have magnetic properties, depending on the particular elements involved.
8.17 g cm‐3
The density of solid Inconel 718 alloy is 8.17 g cm‐3 at the room temperature of 300 K.
It is not unheard of for cutting and shaping tools to be broken or deformed when it used to machine Inconel.
Inconel’s outer layer may harden too quickly in response to machining, resulting in an imperfect shape for the Inconel.
Alloy 718 is an austenitic nickel-base superalloy
Inconel is a family of austenitic nickel-chromium-based superalloys while Stainless steel is an alloy of Iron with a minimum of 10.5% Chromium. Chromium produces a thin layer of oxide on the surface of the steel known as the ‘passive layer’.
nickel chromium material
INCONEL® alloy 718 (UNS N07718/W.Nr. 2.4668) is a high-strength, corrosion-resistant nickel chromium material
Mostly, inconel’s are considered Non-Ferrous materials due to lower content of iron and higher contents of Nickel & Chromium.
Inconel 718 is one of the most difficult-to-cut materials, due to its toughness, lower thermal conductivity and easy work hardening properties
Inconel 718 is a type of high-strength superalloy with a nickel-chrome base that makes it resistant to corrosion
When heated, Inconel forms a thick, stable, passivating oxide layer protecting the surface from further attack. Inconel retains strength over a wide temperature range, attractive for high-temperature applications where aluminium and steel would succumb to creep as a result of thermally-induced crystal vacancies
The Composition of Nickel Inconel 718
Nickel (plus Cobalt)
50%-55%
Chromium
17%-21%
Niobium (plus Tantalum)
4.75%-5.50%
Molybdenum
2.80%-3.30%
Titanium
0.65%-1.15%
Aluminum
0.20%-0.80%
Cobalt
1% max
Carbon
0.08% max
Manganese
0.35% max
Silicon
0.35% max
Phosphorus
0.015% max
Sulfur
0.015% max
Boron
0.006% max
Copper
0.30% max
Iron
Balance*
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We’re special stockist of Inconel 718 & Other inconel special steel bars.
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Due to the extreme toughness and work hardening characteristics of the alloy, the problem of machining Inconel 718 is one of ever-increasing difficulties.
Use high strength tool, Tungaloy inserts work very well on inconel 718
Carbide tools, cutting fluid (at normal or high pressures) and low cutting speed are the main recommendations for finish turning of Inconel 718
Inconel 718 is one of the most difficult-to-cut materials, due to its toughness, lower thermal conductivity and easy work hardening properties
