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Inconel Alloy 690 Chemical Composition Properties, Grade, Tables and PDF Online

Inconel Alloy 690 is a medium chromium austenitic nickel alloy that possesses exceptional resistance to corrosion in high temperature conditions. The dominant elements are nickel (58%), chromium (27%), iron (7%), while others like manganese, silicon, carbon, and sulfur are too small to be noticed. Its chemical composition gives rise to the numerous qualities that it presents. This is alloy that is commonly used in applications which are corrosion resistance, chloride-ions stress cracking corrosion resistance, and excellent oxidizing media resistance. Its grade guarantees outstanding performance in power generation by the water reactor, chemical processing and thermal processing industries. Mechanical properties and thermal properties of this alloy with its corrosion condition are available on the tables and this makes it easier for engineers and researchers to make decisions when choosing this alloy for the needs that are particular to them. Tables, charts and PDF files that are modifications of the course documents provide the students with in-depth details for simple reading and study.

Inconel Alloy 690 Chemical Composition And Grade Table

Inconel Alloy 690 is a corrosion-resistant alloy with a chemical composition designed to support application in tough industrial environments. Consisting mainly of nickel, it puts chromium, iron, and manganese in as well. Besides that, it contains traces of carbon, silicon, sulfur, and phosphorus, carefully selected to improve its strength and resistance to corrosion. This graph demonstrate Alloy 690 excellent performance at high temperature resistance, this fight against oxidation, carburization, and nitridation is remarkable. Its composition guarantees the ability to perform well even in severe circumstances. Therefore, it is preferred to be used for delicate components like engines in the aerospacing, chemical processing, and nuclear industries.

Inconel Alloy 690 Composition Table
Elements Ni Cr Fe Cu Mn Si S C
Min (%) - 27 7 - - - - -
Max (%) 58 31 11 0.5 0.5 0.5 0.15 0.05

Advantages and Disadvantages of Inconel Alloy 690

    Advantages:

  • High Corrosion Resistance: Provides good resistance in diverse climates and has comprehensive suitability in high temperature and corrosive conditions.

  • High Strength: It has good strength level and relatively great resistance to the loss of strength in serve, which qualifies it for stress applications.

  • Excellent Weldability: Excellent weldability since it enables easy shaping /fabrication and erection without compromising its dependable strength.

  • Thermal Stability: Resists deformation by its mechanical components at high temperature; suitable for application in conditions where heat is an important factor.

    Disadvantages:

  • Costly: Somewhat costlier than other materials of construction, and hence can be a factor in hiking up the cost of a particular project.

  • Limited Availability: The possibility of avails availability may also be an issue that will trigger supply chain issues at some point.

  • Susceptible to Embrittlement: It can get embrittled by service environments which compromises its mechanical performance indicators.

  • Machining Difficulty: It is a rather hard material and resistant to machining; it demands some special turning practices that make operations lengthy and expensive.

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