0086-18317160019 [email protected]
Alloy 725 (UNS N07725) is a nickel-chromium-molybdenum-niobium alloy that is highly resistant to corrosion and has been age hardened for extremely high strength twice that of annealed alloy 625. Alloy 725 strength is developed by heat treatment rather than by cold work this also enables strength to be imparted to large non-uniform sections that cannot be strengthened by cold works.
Due to outstanding corrosion resistance and high strength, applications for this alloy are used for hangers, side pocket madrels, springs and polished bore receptacles for sour gas service. The petrochemical and processing industries are good candidates for this alloy. A725 is also used for high strength fasteners in marine applications to resist corrosion, pitting and crevice attack in sea water.
INCONEL alloy 725 Heat Treatment
INCONEL alloy 725 is strengthened by precipitation of gamma double-prime (γ ”) phase during an aging heat treatment. Before it is aged, the material should be given a solution anneal at 1900°F (1040°C). Air cooling after solution annealing is the preferred cooling method. For sour gas applications, the recommended aging treatment is 1350°F (730°C)/8h/furnace cool at 100°F (56°C)/h to 1150°F (620°C)/8h/air cool
Alloy 725 Chemical Composition
Chemical Composition Limits |
||||||||||||
|
Weight% |
Ni |
Cr |
Mo |
Nb |
Ti |
Al |
C |
Mn |
Si |
P |
S |
Fe |
|
Alloy 725 |
55.0-59.0 |
19.0 -22.5 |
7.0-9.5 |
2.75-4.0 |
1.0-1.7 |
0.35 max |
0.03 max |
0.35 max |
0.20 max |
0.015 max |
0.010 max |
Rem |
Material |
Form and Condition |
Yield Strength (0.2% Offset) |
Tensile Strength |
Elongation % |
Hardness, Rc |
||
|
ksi |
MPa |
ksi |
MPa |
||||
|
Alloy 725 round |
Annealed |
62.0 |
427 |
124.0 |
855 |
57 |
5 |
|
Alloy 725 round |
Age Hardened |
133.0 |
917 |
180.0 |
1241 |
30 |
36 |
|
Transverse Specimens from hot-finished rounds of 4.0 to 7.5 in (102 to 190mm) diameter |
|||||||
We are specialises in supplying high performance metal alloys to a wide variety of industries. As a highly respected China supplier we provide the finest quality heat resistant, corrosion resistant, aerospace, titanium and stainless steel alloys anywhere on the market.If you need any forms of Alloy 725 ,please contact us by [email protected] ,we can give you the best service and price!
TEL : 0086-18317160019
E-mail : [email protected]
Address : No.230,1st Floor,Building No.1,No.221 Of Huashen Road,Free Trade Area Of Pudong New District,Shanghai China
