2.4856 Inconel 625

Inconel 625 is a molybdenum-niobium enhanced, solution-strengthened nickel-chromium superalloy, renowned for its high-temperature stability, corrosion resistance, and versatility in aerospace, chemical processing, and marine engineering.

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Core Properties of Inconel 625

Inconel 625 is a molybdenum-niobium enhanced, solution-strengthened nickel-chromium superalloy, renowned for its high-temperature stability, corrosion resistance, and versatility in aerospace, chemical processing, and marine engineering.

Key Features

Corrosion Resistance

Resists chloride stress corrosion cracking, seawater, nitric/phosphoric acids, and diluted sulfuric/hydrochloric acids.

Compliant with NACE MR-01-75 for sour gas environments.

High-Temperature Performance

Operating range: -253°C to 980°C; long-term service up to 950°C.

Maintains tensile strength and fatigue resistance under extreme heat.

Machinability & Welding

Compatible with TIG welding and brazing, no post-weld cracking.

Available as plates, bars, tubes, and forgings.

Physical Properties

Density 8.44 g/cm³, melting point 1290–1350°C, non-magnetic.

Performance Comparison with Similar Alloys

Alloy	Inconel 625	Inconel 718	Hastelloy C-276
Composition	Ni-Cr-Mo-Nb	Ni-Cr-Fe-Nb-Ti	Ni-Mo-Cr-W
Max Temperature	980°C	700°C	1093°C
Corrosion Resistance	Chlorides, seawater, acids	Moderate	Strong acids, chlorides
Tensile Strength	≥830 MPa	≥1350 MPa	≥790 MPa
Applications	Jet engines, chemical reactors	Turbine disks, fasteners	Acid reactors, FGD systems

Summary: Inconel 625 excels in balanced high-temperature and corrosion resistance, while Inconel 718 offers higher strength, and Hastelloy C-276 targets aggressive acidic environments.