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Inconel 625

Inconel 625(NO6625)
he alloy is a solid solution-reinforced nickel-based deformed superalloy with molybdenum niobium as the main strengthening element. it has excellent corrosion resistance and high oxidation performance. from low temperature to high temperature 980℃, it has good tensile and fatigue properties, and it is also resistant to stress corrosion under salt mist atmosphere. Therefore, it can be widely used in the manufacture of aeroengine parts, aerospace structural parts and chemical equipment.

Inconel 625 common number corresponding

Category

General name

Number of German marks

Unified Digital Number Number Number

Ni-Cr-Fe

Inconel 625 60Ni22Cr9Mo3.5Cb

2.4856

N26625



Inconel 625 corresponding casting forgings and bar grades

Cast castings

Forgings (similar deformed alloys)

Bar

Specification No.

Licence

Specification No.

Licence

Specification No.

Licence

ASTM A 494

CW-6MC

ASME B 564

N06625

ASME B 446

NO6625



Inconel 625 other brands corresponding

Name

GB of China

ASTM of the United States

DIN Germany

British BS

AFNOR France

New brand

Old brand

Inconel 625

NS3306

NS336

UNS N06625

W.Nr.2.4856(NiCr22Mo9Nb)

NA21

NC 22DNb



Inconel 625 physical properties:

 Density

 Melting point

 Thermal conductivity

 Specific heat capacity

 Elastic modulus

 Shear modulus

 resistivity

Poisson's ratio

 Line expansion coefficient

g/cm3

λ/(W/m•℃)

J/kg•℃

GPa

GPa

μΩ•m

a/10-6℃-1

8.44

1290

12.1(100℃)

430

205

79

1.28

0.308

12.3(20~100℃



Inconel 625 chemical composition

Licence

UNS No.

Chemical element%

C

Mn

Si

P

S

Mo

Fe

Ni

Cr

Cb(Nb)

Ksi[Mpa] of minimum tensile strength

Minimum yield strength Ksi[Mpa]

Minimum elongation,% gauge 2 inches

CW6MC

N26625

Max

0.06

1.00

1.00

0.015

0.015

8.0-10.0

5.0

Balance

20.0-23.0

3.15-4.5

70[485]

40[275]

25



Inconel 625 temperature range

General name

Specification No.

Licence

Temperature range

Inconel 625

ASTM B 564

N06625

Suitable temperature≤700℃, flange end valve≤538℃only use annealed material



Inconel 625 heat treatment requirements

Licence

Heat treatment requirements

CW-6MC

Heat up to more than 1175℃, keep enough time to heat the casting to this temperature, then quench it in water or otherwise quench it.



Inconel 625 corrosion properties

Medium

Inconel the nickel content in the alloy is much higher than that of stainless steel, the corrosion resistance of alkali sulfide is better than that of stainless steel, and the corrosion resistance of high temperature is better. The corrosion resistance of Ni-Fe alloy is better than that of Ni in oxidizing environment. Because of the high nickel content, it also has good corrosion resistance in reducing environment.Very suitable for reducing acid, pitting corrosion and crevice corrosion.