Incoloy Alloys
The Incoloy alloys are used in a wide range of industries and applications around the world, including:
Aerospace Engineering Electrical Resistance Heating
Oil and Gas Extraction Power Generation
Automotive Engineering Electronics and Communications
Petrochemical Processing Thermal Processing and Heat Treatment
Chemical Processing Marine Engineering
Pollution Control and Waste Processing Welding
Common Trade Names: Incoloy 925; Alloy 925:
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.
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
