Project Description
Inconel 625 (UNS N06625 / W.Nr. 2.4856)
Inconel 625 (UNS N06625 / W.Nr. 2.4856) is a nickel-chromium-molybdenum alloy with an addition of niobium that acts with the molybdenum to stiffen the alloy’s matrix and thereby provide high strength without a strengthening heat treatment. The alloy resists a wide range of severely corrosive environments and is especially resistant to pitting and crevice corrosion. Used in chemical processing, aerospace and marine engineering, pollution-control equipment, and nuclear reactors.
Equivalent Grades
Trademark | GB | GOST | ASTM | UNS | DIN | W.Nr. | NF | BS | JIS | SS |
Inconel 625 | GH3625 NS3306 NS336 | – | Inconel 625 | N06625 | NiCr22Mo9Nb | 2.4856 | NiCr22Mo9Nb | NiCr22Mo9Nb NA21 NA43 | NCF 625 | – |
Chemical Composition, %
Alloy | C | Si | Mn | P | S | Cr | Ni | Co | Mo | Al | Ti | Fe |
Inconel 625 | ≤0.10 | ≤0.50 | ≤0.50 | ≤0.020 | ≤0.015 | 20.0-23.0 | ≥58.0 | ≤1.0 | 8.0-10.0 | ≤0.40 | ≤0.40 | Bal |
Typical Physical and Mechanical Properties (RT, Annealed)
Density, g/cm3 | Melting Point, ℃ | Tensile Strength, MPa | Yield Strength, MPa | ELongation, % | Hardness, HRB |
8.44 | 1290-1350 | 827-1034 | 414-655 | 30-60 | / |
Available Products and Specifications
Rod, Bar, Wire and Forgings | ASTM B446/ASME SB446(Rod, Bar), ASTM B564/ASME SB564(Forgings), DIN 17752(Rod, Bar)/17753(Wire)/17754(Forgings), ISO 9723(Rod, Bar)/9724(Wire)/9725(Forgings) |
Plate, Sheet and Strip | ASTM B443/ASME SB443(Plate, Sheet, Strip), DIN 17750(Plate, Strip, Sheet), ISO 6208(Plate, Sheet, Strip), EN10095(Plate, Sheet, Strip), DIN 17750(Plate, Sheet, Strip) |
Pipe and Tube | ASTM B444/ASME SB444/ASTM B829/ASME SB829(Pipe, Tube), ASTM B704/ASME SB704/ASTM B751/ASME SB751/ASTM B705/ASME SB705/ASTM B775/ASME SB775(Welded Tube), DIN 17751(Tube), ISO 6207(Tube) |
Welding Product | Inconel Filler Metal 625-AWS A5.14/ERNiCrMo-3 |
Others | ASTM B366/ASME SB366(Fittings), DIN17744 |
Features
- High creep-rupture strength
- Oxidation resistant to 1800°F
- Good fatigue resistance
- Excellent weldability
- Outstanding resistance to chloride pitting and crevice corrosion
- Immune to chloride ion stress corrosion cracking
- Resistant to seawater under both flowing and stagnant conditions and under fouling
Applications
- Aircraft ducting systems
- Jet engine exhaust systems
- Engine thrust-reverser systems
- Bellows and expansion joints
- Turbine shroud rings
- Flare stacks
- Seawater components
- Chemical process equipment handling mixed acids both oxidizing and reducing