Nickel-chromium alloy Inconel 718 performance technical standards
Alloy 718 was originally developed for the aerospace industry, but its excellent strength and corrosion resistance have been recognized by the petroleum industry and are now widely used in this field.
Alloy 718 is a nickel-chromium alloy that can be heat treated to obtain high strength, good corrosion resistance, easy formability, and good resistance to strain aging cracking when welded. The alloy can be used at temperatures up to 700ºC.
Alloy 718 for the petroleum industry is heat treated to a hardness not exceeding 40HRC, which is the maximum allowed by NACE MR-01-75/ ISO 15156:3 to prevent stress corrosion cracking. The main applications in this field are valves and precision tubing.
Alloy 718 for aerospace and power generation is heat treated to provide maximum strength and high creep resistance, with typical hardness values exceeding 42HRC. The main applications are components for gas turbines, aircraft engines, fasteners and other high-strength applications.
Available Tube Product Forms
Straight
Seamless
Typical Applications
Heat Exchangers
Wellhead Completion Equipment
Spandrels
Valve
Typical Manufacturing Specifications
AMS 5589 Series
AMS 5590 Series
Individual customer specifications are also available.
Industries that Use This Grade Majorly
Aerospace
Oil and Gas
Nuclear and Electric Power
Alloy 718 is a high-performance alloy that plays an important role in many fields.
In terms of composition, Alloy 718 usually contains a variety of elements such as nickel, chromium, iron, molybdenum, and niobium. The precise proportions of these elements give it excellent properties. For example, the presence of nickel enhances the alloy's corrosion resistance and high-temperature stability; chromium significantly improves its oxidation resistance, making it less likely to oxidize and rust at high temperatures and in harsh environments.
In terms of performance, Alloy 718 exhibits excellent strength and toughness. It can withstand huge pressure and tension, while not easily breaking when impacted. This makes it very popular in the aerospace field, such as for the manufacture of key components of aircraft engines. Like turbine blades, they need to work under extreme conditions of high temperature, high pressure and high-speed rotation. Alloy 718 can do this task well with its excellent performance.
Not only that, Alloy 718 is also widely used in the energy field. In oil and gas extraction, its excellent corrosion resistance and high strength can ensure the long-term stable operation of equipment in complex underground environments. For example, tools used to manufacture deep well drilling can withstand the erosion of underground high temperature, high pressure and corrosive fluids.
From the perspective of historical development, the research and development of Alloy 718 is an important achievement of the continuous progress of materials science. After years of research and experiments, scientists have continuously optimized its composition and manufacturing process to continuously improve its performance. In the future, with the further development of science and technology and the continuous improvement of material performance requirements, Alloy 718 is expected to show its unique value in more fields and make greater contributions to the development of human society.
Alloy 718 was originally developed for the aerospace industry, but its excellent strength and corrosion resistance have been recognized by the oil industry and are now widely used in this field.
Alloy 718 is a nickel-chromium alloy that can be heat treated to obtain high strength, good corrosion resistance, easy formability, and good resistance to strain age cracking when welded. The alloy can be used at temperatures up to 700ºC.
Alloy 718 for the petroleum industry is heat treated to a hardness not exceeding 40HRC, the maximum allowed by NACE MR-01-75/ ISO 15156:3, to prevent stress corrosion cracking. The main applications in this field are valves and precision tubing.
Alloy 718 for aerospace and power generation is heat treated to provide maximum strength and high creep resistance, with typical hardness values exceeding 42HRC. The main applications are components for gas turbines, aircraft engines, fasteners, and other high strength applications.
