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 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
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.
Chemical Composition
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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