Incoloy 925

Update : 2026-02-25

Incoloy 925
Incoloy 925 (UNS N09925) is an age‑hardenable nickel‑iron‑chromium alloy with additions of molybdenum, copper, titanium, and aluminum. It delivers outstanding resistance to pitting, crevice corrosion, and chloride‑induced stress corrosion cracking. It combines high mechanical strength, good fabricability, and weldability, performing reliably in sour gas, seawater, and harsh corrosive environments. With stable properties at elevated temperatures, it is widely used for critical components requiring both high strength and superior corrosion resistance.
Equivalent Grade

UNS N09925

W.Nr.: 1.4529 (Grade 925)

Chinese Standard: GH3925

Standard

● Sheet/Plate: ASTM B625

Seamless Pipe: ASTM B626

Bar: ASTM B625

Alloy TypeNickel-Chromium-Iron-Molybdenum-Niobium-Copper Alloy (Precipitation Hardening Corrosion-Resistant Type)
StandardSheet, Bar, Pipe, Tube, Fittings, Flange, Welding Materials, Forgings, Wire, Pipe Fittings
Key Properties

● Corrosion resistance is better than Incoloy 825, resistant to strong corrosive media such as sulfuric acid, hydrochloric acid and phosphoric acid

High strength after precipitation hardening, extremely strong resistance to pitting, crevice corrosion and stress corrosion cracking

Resistant to seawater and chloride-containing medium corrosion, good hot and cold forming performance, excellent weldability

Applicable EnvironmentChemical strong corrosion scenarios, deep-sea and offshore engineering environment, oil and gas extraction (especially acidic oil and gas), pickling equipment, nuclear power auxiliary corrosion environment
Typical ApplicationsDeep-Sea Mining Equipment, Acidic Oil And Gas Pipelines, Chemical Corrosion-Resistant Reactors, Offshore Platform Fittings, Pickling Equipment, Nuclear Power Auxiliary Equipment, Precision Corrosion-Resistant Components, etc.


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