In this blog, we will explore the properties of Inconel 718 round bars, their key uses, and factors that influence pricing, so you can make an informed decision whether you’re using it for manufacturing, fabrication, or industrial projects.

What is Inconel 718?
Inconel 718 Round Bar is a nickel-chromium superalloy that is known for its exceptional strength and resistance to oxidation and corrosion, even at very high temperatures. It primarily consists of:

Nickel (50-55%)
Chromium (17-21%)
Iron (balancing element)
Niobium and Molybdenum (which enhance strength and high-temperature performance)
This combination of elements allows Inconel 718 to maintain its integrity in extreme environments, making it ideal for applications in high-pressure, high-temperature settings.

One of the most important properties of Inconel 718 is its ability to perform well in environments where other alloys might fail due to thermal cycling, corrosion, or stress. This makes it especially suited for industries where durability, reliability, and performance are critical.

Key Properties of Inconel 718 Round Bar
Inconel 718 round bars are often manufactured to meet specific standards, depending on the intended application. Here are some key properties that make Inconel 718 a preferred choice:

High Strength at Elevated Temperatures: Inconel 718 can withstand temperatures up to 1300°F (700°C), maintaining high tensile, fatigue, and creep strength even in extreme conditions.
Excellent Corrosion Resistance: The high chromium and nickel content make Inconel 718 highly resistant to oxidation and corrosion, particularly in acidic and high-temperature environments.
Good Weldability: Inconel 718 can be welded using various techniques, making it versatile for fabrication and assembly processes.
Thermal Stability: The alloy can maintain its mechanical properties after prolonged exposure to high temperatures, which is essential in aerospace and power generation industries.
Resistant to Fatigue and Thermal Cracking: The alloy’s resistance to stress and its ability to withstand fluctuating temperatures make it highly durable in dynamic environments.
Common Applications of Inconel 718 Round Bars
Inconel 718 round bars are highly sought after for their ability to withstand extreme conditions. Some of the most common applications include:

1. Aerospace:
Inconel 718 is used extensively in the aerospace industry for components that need to withstand high stress and temperatures. Examples include:

Turbine blades and discs: These parts must endure extremely high temperatures and mechanical stress while maintaining structural integrity.
Engine components: Inconel 718 is used in parts of gas turbines, rocket engines, and other high-performance aerospace engines.
Fasteners and seals: The alloy’s ability to resist oxidation and maintain strength at high temperatures makes it ideal for aerospace fasteners.
2. Gas Turbines:
Due to its resistance to heat and corrosion, Inconel 718 round bars are commonly used in the manufacturing of gas turbine components such as turbine blades, rotors, and casings. These parts must be able to withstand very high temperatures and corrosive gases, making Inconel 718 an excellent choice.

3. Chemical Processing:
Inconel 718’s corrosion resistance also makes it suitable for chemical processing equipment, particularly in industries that deal with aggressive acids or harsh chemicals at high temperatures. It is commonly used in reactors, heat exchangers, and other chemical process equipment.

4. Nuclear Power:
Due to its resistance to radiation and its ability to perform under extreme pressure and temperature conditions, Inconel 718 is also used in nuclear reactors for parts such as pressure vessels, piping, and valve components.

5. Marine:
Inconel 718 is used in marine applications that require resistance to both high temperatures and the corrosive effects of seawater. Components such as propeller shafts, exhaust systems, and heat exchangers benefit from the material’s durability.

Factors That Affect the Price of Inconel 718 Round Bars
The price of Inconel 718 round bars can vary based on several factors, including:

1. Material Composition:
The alloy’s specific chemical composition—especially the amount of nickel, chromium, and molybdenum—affects the cost. Higher concentrations of these elements contribute to the overall price, as they increase the material’s performance in demanding environments.

2. Size and Diameter of the Round Bar:
The larger the diameter and length of the round bar, the more expensive it will be. Since Inconel 718 is a high-performance alloy, it is sold at a premium price, particularly when dealing with larger sections of round bars.

3. Supplier and Location:
Prices can vary depending on the supplier and where you’re purchasing the material from. Local suppliers may offer more competitive prices, while international suppliers may include shipping or import fees.

4. Market Demand and Supply:
Inconel 718 is in demand for high-performance applications, so market fluctuations can impact pricing. If there’s a global shortage or if demand spikes due to aerospace or power generation needs, prices may rise.

5. Processing and Fabrication:
Some suppliers may offer pre-fabricated or custom-cut Inconel 718 round bars, which come at a higher price due to the extra machining or processing required.

Price Range of Inconel 718 Round Bar
As of 2024, Inconel 718 round bars can range from $40 to $80 per kilogram or more, depending on the diameter, length, and quantity purchased. For smaller diameters (1-2 inches), the price may be on the lower end of the spectrum, while larger diameters (3 inches and above) will cost more due to the higher material and manufacturing costs.

Conclusion
Inconel 718 round bars are vital for a variety of high-performance industries that require strength, corrosion resistance, and thermal stability. From aerospace to chemical processing and gas turbines, this superalloy excels in extreme environments.

When purchasing Inconel 718 round bars, it’s important to understand the alloy’s composition, applications, and factors that impact pricing. By carefully selecting the right size, supplier, and order quantity, you can ensure that you get the best material for your needs at the most competitive price.