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Incoloy® Alloy 925

Common Trade Names: Incoloy 925; Alloy 925:
Incoloy® Alloy 925 (UNS N09925) is an agehardenable nickel-iron-chromium alloy with additions of molybdenum, copper, titanium and aluminum. 

The nickel content is sufficient for protection against chloride-ion stress corrosion cracking. The nickel, in conjunction with the molybdenum and copper, also gives outstanding resistance to reducing chemicals. The molybdenum aids with the resistance to pitting and crevice corrosion. The alloy’s chromium content provides resistance to oxidizing environments. The titanium and aluminum additions cause a strengthening reaction during heat treatment.

INCOLOY® alloy 925 is used in various applications requiring a combination of high strength and corrosion resistance. Because of the alloy’s resistance to sulfide stress cracking and stress-corrosion cracking in “sour” (H2S containing) crude oil and natural gas, it is used for down-hole and surface gaswell components including tubular products, valves, hangers, landing nipples, tool joints and packers. The alloy is also useful for fasteners, marine and pump shafting and high-strength piping systems

Available Product Forms: 

Tube, round bar, flat bar, forging stock and wire

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Specifications

INCOLOY® alloy 925 is designated as UNS N09925.

Designations and specifications for the product include NACE MR-01-75, ASME Boiler and Pressure Vessel Code Case 2218 Section VIII Division 1.

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.

Incoloy® Alloy 925  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...........................................................................42.0-46.0

Chromium....................................................................19.5-22.5

Iron...................................................................................22 min

Molybdenum....................................................................2.5-3.5

Copper.............................................................................1.5-3.0

Titanium...........................................................................1.9-2.4

Aluminum.........................................................................0.1-0.5

Manganese ...................................................................1.0 max.

Silicon ...........................................................................0.5 max.

Niobium.........................................................................0.5 max.

Carbon ........................................................................0.03 max.

Sulfur ..........................................................................0.03 max. 

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