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Alloy 725 is a nickel chromium-molybdenum-niobium alloy that is highly resistant to corrosion and is age hardenable for extremely high strength. It has essentially the same corrosion resistance as alloy 625, which is widely used in a broad range of severely corrosive environments. The strength of age-hardened alloy 725 is of order twice that of annealed alloy 625. Because the strength of alloy 725 is developed by heat treatment, not by cold work, ductility, and toughness remain high.
Alloy 725 is used for pipe fittings, joints, and bearings in acid-resistant equipment. It is also widely used in Marine equipment.
Specifications
|
Grade |
UNS |
|
Alloy 725 |
N07725 |
Chemical Composition
|
Grade |
% |
Ni |
Cr |
Fe |
Mo |
Al |
Ti |
Nb |
|
725 |
Min |
55 |
19 |
Bal. |
7 |
|
1 |
2.75 |
|
Max |
59 |
22.5 |
9.5 |
0.35 |
1.7 |
4 |
Mechanical properties：(Minimum value at 20℃)
|
Tensile Strength σb/MPa |
Yield Strength σp0.2/MPa |
Elongation σ5 /% |
|
758 |
310 |
30 |
Standards
|
Bar |
Wire |
|
ASTM B805 |
ASTM B805 |
Forging, Bar, Plate, Strip, Wire, Seamless Pipe, Flange, Pipe Fitting
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Phone: 86-21-13636586008
Email: adahua@nichromalloy.com
Address: RM1108 ， No.888 North Sichuan Road , Hongkou District , Shanghai , China .
