Inconel 725
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Inconel 725 is highly resistant to corrosion and is age hardenable for extremely high strength. It is used in a broad range of severe corrosive environments. The strength of age-hardened A725 is twice that of A625 annealed. Strength in A725 is obtained by heat treatment and can also be cold worked for even higher strength. There is also a high resistance in reducing and oxidizing environments and increased resistance to pitting and crevice corrosion in sea water and stress corrosion cracking.
Inconel 725 Trade Name: Alloy 725; UNSN07725
Inconel 725 Chemical composition
|
Alloy |
% |
Ni |
Cr |
Mo |
Al |
Ti |
Fe |
Nb |
|
725 |
Min. |
55 |
19 |
7 |
1 |
balance |
2.75 |
|
|
Max. |
59 |
22.5 |
9.5 |
0.35 |
1.7 |
4 |
Inconel 725 Physical properties
|
Density |
8.31g/cm³ |
|
Melting point |
1271-1343℃ |
Inconel 725 minimum mechanical properties in the room temperature
|
Alloy state |
Tensile strength |
Yield strength R P0. 2N/mm² |
Elongation A 5 % |
Brinell hardness HB |
|
Annealing treatment |
850 |
400 |
30 |
- |
|
Solution treatment |
600 |
300 |
30 |
≤220 |
Inconel 725 Specifications:
|
Wire |
Sheet |
Strip |
Pipe |
Rod |
|
ASTM B805 ASME 2217 |
/ |
/ | / |
ASTM B805 ASME 2217 |
Inconel 725 Application field:
1.Hangers, side pocket madrels, springs and polished bore receptacles for sour gas service.
2.The petrochemical and processing industries are good candidates for this alloy.
3.Alloy 725is also used for high strength fasteners in marine applications to resist corrosion, pitting and crevice attack in sea water.
