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Inconel® Alloy 725

Common Trade Names: Inconel 725, Alloy 625, Nickel 725.

INCONEL® alloy 725 (UNS N07725) is a nickel- chromium-molybdenum-niobium alloy that is highly resistant to corrosion and is age hardenable for extremely high strength. It has essentially the same corrosion resistance as INCONEL® alloy 625, which is widely used in a broad range of severely corrosive environments. The strength of age-hardened INCONEL® alloy 725 is of the order of twice that of annealed alloy 625. Because the strength of alloy 725 is developed by heat treatment, not by cold work, ductility and toughness remain high. Also, strength can be imparted to large or non-uniform sections that cannot be strengthened by cold work.

Available Product Forms: 
Round bar and wire

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Specifications

INCONEL® alloy 725 is designated as UNS N07725. 

Bar and wire: ASTM B 805, ASME Code Case 2217 

Trademark Notice: Some names are trade names and/or trademarks of specific manufacturers. American Special Metals, Corp. is not affiliated with any manufacturer(s). Orders will be filled to meet specifications from any available source(s). Names are listed solely for reference to help identify products consistent with listed specifications.

Inconel® 725 is a Registered Trademark of Special Metals Corporation and Its subsidiaries.

American Special Metals, Corp. makes all reasonable efforts to ensure the accuracy and correctness of the data in this document but makes no representations or warranties as to the data’s accuracy, correctness or reliability. All data are for general information only and not for providing design advice. It is the responsibility of the user to test specific alloys under actual service conditions to determine their suitability for a particular purpose.

Chemical Composition

Limiting Chemical Composition, %  by Weight  

Nickel.........................................................................55.0-59.0
Chromium..................................................................19.0-22.5
Molybdenum..................................................................7.0-9.5
Niobium.......................................................................2.75-4.0
Titanium.........................................................................1.0-1.7
Aluminum..................................................................0.35 max.
Carbon......................................................................0.03 max.
Manganese...............................................................0.35 max.
Silicon.......................................................................0.20 max.
Phosphorus.............................................................0.015 max.
Sulfur.......................................................................0.010 max.
Iron..............................................................................Balance

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