Ni-718 Nickel Alloy Steel Material

Ni-718 alloy steel has high temperature strength, corrosion resistance and other characteristics, and complies with multiple standards. It contains elements such as Ni and Cr. Ni-718 alloy steel is used in aerospace, petroleum, nuclear energy and other fields, and has physical and mechanical properties such as high density, high thermal conductivity, and high tensile strength.

The nickel alloy Ni-718 has good high-temperature strength and corrosion resistance, and its main characteristics include:

High temperature performance: Ni-718 can maintain good mechanical properties even at temperatures up to 1300 degrees Fahrenheit (approximately 700 degrees Celsius).

Weldability: The superior weldability of alloys enables them to be effectively utilized in complex structural designs.

Fatigue resistance: Heat treated Ni-718 has excellent fatigue resistance and is suitable for high load working conditions.

Corrosion resistance: Ni-718 exhibits strong corrosion resistance in various chemical media and is suitable for use in harsh environments.

Steel execution standards

The production and testing of nickel alloy Ni-718 must comply with multiple standards to ensure its quality and performance, such as:

ASTM B637： This is the standard for nickel based alloys, covering the chemical composition and necessary mechanical performance requirements of the material.

AMS 5662： This standard mainly specifies the inspection and approval of aerospace materials to ensure that alloys meet strict application requirements.

ISO 15156： This standard applies to alloys in the oil and gas industry, ensuring their reliability under extreme conditions.

Chemical composition

The chemical composition of Nickel Alloy Ni-718 Steel is crucial for its performance. Its main components include:

This chemical composition ratio gives Ni-718 alloy high tensile strength, good wear resistance, and corrosion resistance, making it suitable for various extreme working conditions.

Nickel (Ni): 50-55%, Chromium (Cr): 17-21%, Molybdenum (Mo): 2.8-3.3, Iron (Fe): Excess, Aluminum (A): 0.2-0.8

Application scope and processing

The widespread application of nickel alloy Ni-718 has made it highly competitive in the market. Its main application areas include:

Aerospace: Used for aircraft engine structural components, high-pressure turbines, and gas turbine components.

Petroleum industry: Used in oil and gas drilling equipment to withstand high-pressure and high-temperature environments.

In the field of nuclear energy: as an important component of reactors and nuclear power plants.

Mold industry: used for manufacturing high-strength mold components, especially in the production of thermoforming and plastic injection molds.

The processing technology requirements for nickel alloy Ni-718 are relatively high, usually using a combination of forging and heat treatment to ensure its stable performance. During the processing, attention should be paid to controlling the processing temperature and cooling rate to avoid stress concentration and deformation of the material.

Physical and mechanical properties

Understanding the physical and mechanical properties of nickel alloy Ni-718 is crucial for its material selection and application

Density: The density of Ni-718 Nickel Alloy Steel is approximately 8.19 g/cm ³, ensuring its stability in high-strength applications.

Thermal conductivity: The thermal conductivity of this alloy is about 9 W/(m · K), which is sufficient to meet the requirements of most engineering applications.

Tensile strength: After heat treatment, the tensile strength of Ni-718 can reach 1400 MPa, indicating its stability under extreme working conditions.

Yield strength: Its yield strength can reach 1100 MPa and can withstand large external loads without deformation.

Elongation: Before fracture, the elongation of Ni-718 can reach over 20%, demonstrating good toughness.