Inconel 690

Introduction to Inconel 690 and Its Industrial Importance

Inconel 690, developed as an enhanced version of Inconel 600, is a nickel-based superalloy known for its excellent oxidation and corrosion resistance in extreme environments. Composed primarily of nickel (over 58%), chromium (27-31%), and iron (7-11%), this alloy includes trace elements such as silicon, manganese, aluminum, titanium, and carbon. These elements improve mechanical strength, oxidation resistance, and structural stability under high temperatures. Dong-A Special Metals, Inc. specializes in recycling and supplying high-grade Inconel 690 alloy materials.


Exceptional Corrosion Resistance in Harsh Conditions

The hallmark of Inconel 690 is its high chromium content, which forms a stable Cr₂O₃ oxide layer that protects the alloy in highly oxidizing environments. This layer enhances corrosion resistance in conditions involving water vapor, basic solutions, sulfuric acid, phosphoric acid, molten salts, and radioactive waste liquids. The Ni-based structure offers unique stability where stainless steel and simpler nickel alloys fail, making it ideal for nuclear reactors, thermochemical plants, and petrochemical facilities.


Applications and Advantages of Inconel 690

Inconel 690 is widely used in high-risk industries due to its superior performance in resisting stress corrosion cracking (SCC) and thermal fatigue. Its primary application lies in nuclear power plant steam generator tubes, where it resists high pressure and temperature corrosion. Additional applications include high-temperature boilers, heat exchangers, and chemical reactors. The alloy's durability reduces maintenance costs and enhances safety in long-term operations.

Dong-A Special Metals supports the domestic supply of this high-value material through advanced recycling technologies. We ensure precise alloy separation and material purity, enabling high-quality reuse of Inconel 600, 625, 690, and 718 scrap. Recycling Inconel 690 also contributes to carbon neutrality by saving energy and reducing emissions compared to raw metal extraction.

As the global demand for high-performance alloys grows, especially in the nuclear and energy sectors, Inconel 690 continues to be a critical material. Dong-A Special Metals is committed to supporting industries that rely on this reliable and sustainable alloy.




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