Inconel Alloy 625

Product Detail

Inconel 625 UNSNO6625

Chemical Composition Wt.%

%

Ni

Cr

Mo

Nb

Fe

Al

Ti

C

Mn

Si

Co

P

S

min

bal

20

8

3.15

max

bal

23

10

4.15

5

0.4

0.4

0.1

0.5

0.5

1

0.015

0.015

Physical Constants

Density.g/cm³

8.4 g/cm³

Melting Range

1290-1350 ?

The minimum mechanical properties of the alloy at room temperature

Typical mechanical properties

Rm N/mm2

RP0.2N/mm2

A5 %

HB

Solution treatment

830

414

30

=290

Characters

1. Oxidation and reduction of the environment of a variety of corrosive media have a very good corrosion resistance 2. Excellent resistance to pitting and crevice corrosion, and does not produce due to chloride stress corrosion cracking 3. Excellent resistance to inorganic acid corrosion, such as nitric acid, phosphoric acid, sulfuric acid, hydrochloric acid and sulfuric acid and hydrochloric acid mixed acid 4. Excellent resistance to various inorganic acid mixed solution corrosion 5. Temperature up to 40 ?, in various concentrations of hydrochloric acid solution can show good corrosion resistance 6. Good processability and weldability, no post-weld cracking sensitivity 7. With a wall temperature at -196 ~ 450 ? pressure vessel manufacturing certification 8. Certified by NACE standards of American Society of Corrosion Engineers (MR-01-75) Complies with the highest standard of use for acid gas atmospheres Grade VII

Microstr ycture

625 is a face-centered cubic lattice structure. After holding at about 650 ?  for a sufficient period of time, carbon particles will be precipitated and the unstable quaternary phase will be transformed into a stable Ni3 (Nb, Ti) orthorhombic lattice phase. After solid solution strengthening, the molybdenum and niobium components in the Ni-Cr matrix will improve the mechanical properties of the material, but the plasticity will be reduced.

Applications

1. Chlorinated organic chemical process components, especially in the use of acidic chloride catalyst occasions 2. Digester and bleach tank for the pulp and paper industry 3. Flue gas desulphurization system absorber, reheater, flue gas inlet baffle, fan (humid), stirrer, baffle and flue, etc. 4. For the manufacture of equipment and components for use in sour gas environments 5. Acetic acid and acetic anhydride reaction generator

6. Sulfuric acid condenser