Inconel Alloy 690

Common Trade Names: Inconel 690, Alloy 690, Nickel 690

INCONEL alloy 690 - UNS N06690 Werkstoff No. 2.4642 is a high-chromium nickel alloy having excellent resistance to many corrosive aqueous media and high- temperature atmospheres. In addition to its corrosion resistance alloy 690 has high strength, good metallurgical stability and favorable fabrication characteristics

Properties:

• The substantial chromium content gives the alloy outstanding resistance to oxidizing chemicals and to high-temperature oxidizing gases
• The high level of nickel imparts resistance to stress- corrosion cracking in chloride-containing environments as well as to sodium hydroxide solutions
• In various types of high-temperature water, alloy 690 displays low corrosion rates and excellent resistance to stress-corrosion cracking

Typical Applications:

• tail-gas reheaters used in nitric acid production and heating coils and tanks for nitric/hydrofluoric solutions used in pickling of stainless steels and reprocessing of nuclear fuels
• coal-gasification units
• burners and ducts for processing sulfuric acid
• furnaces for petrochemical processing, recuperators, incinerators, and glass vitrification
• equipment for radioactive waste disposal
• steam generator tubes, baffles, tubesheets, and hardware in nuclear power generation

Product Forms:

• Plates
• Round Bars
• Pipes and tubes

Inconel 690 is a Registered Trademarks of Special Metals Corporation and Its subsidiaries