Inconel 625

Inconel 625 is different from many other Inconel alloys; its composition differs exponentially. In addition to the standard nickel-chromium-iron blend, Inconel 625 contains amounts of molybdenum and columbium. The combination of molybdenum and columbium alloyed together produces a metal that is naturally strong. It does not have to undergo heat treatment, like many other metals, to achieve high levels of strength. It also has the corrosion resistance common in nickel alloys, and is particularly well suited for crevices. Because of this, Inconel 625’s properties are often utilized for marine and aerospace engineering, along with welding.
Its unique composition and properties make Inconel 625 excellent in both acidic and alkaline environments, along with those that are caustic and aqueous. Sea water environments are a common application as well, along with those that experience high stress. Inconel 625 has been known to replace Type 304 Stainless Steel due to its increased strength and fatigue resistance.
The metal is best worked under a combination of hot and cold practices, as it work-hardens rapidly.

Marine Industry

Specifications – Inconel 625

StandardInconel 625
UNSN06625
Werkstoff Nr.2.4856
ENNiCr22Mo9Nb
BSNA 21
GOSTХН75МБТЮ
ORЭИ602
JISNCF 625
AFNORNC22DNB4M

Physical Properties – Inconel 625

Density 8.44 g/cm 3 / 0.305 lb/in 3
Melting Point 1290 -1350 (°C) / 2350 – 2460 (°F)
Specific Heat @ 70°F 0.098 Btu/lb/°F
Permeability at 200 Oersted (15.9 kA) 1.0006
Curie Temperature -190 (°C) / < -320 (°F)
Young’s Modulus (N/mm2) 205 x 10
Annealed871 (°C) / 1600 (°F)
QuenchRapid Air

Chemical Composition – Inconel 625

ElementInconel 625
Ni58.0 min
Al0.40 max
Fe5.0 max
Mn0.50 max
C0.10 max
Si0.50 max
S0.015 max
P0.015 max
Cr20.0 – 23.0
Nb + Ta3.15 – 4.15
Co (if determined)1.0 max
Mo8.0 – 10.0
Ti0.40 max

Oil & Gas Industry

Inconel 625 Products

Pipes & Tubes
Tubing
Seamless Pipe
Round Bar
Square Bar
Hex Bar
Sheet
Coil
Plate
Elbow / Bends
Fitting-Flanges-Reducer
Fitting-Flanges-Stubend
Fitting-Flanges-cap
Flanges-sorf-wnrf
Fitting-Flanges-fasteners
Wire-filler
Wire-coil
Wire-spool