Inconel® 725 Nickel Alloy
UNS N07725 | ASTM B637 | NACE MR0175Inconel® 725 Nickel Alloy
INCONEL® 725 nickel alloy 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 INCONEL® alloy 625, which is widely used in a broad range of severely corrosive environments. The strength of age-hardened INCONEL® alloy 725 is of the order of 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. Also, strength can be imparted to large or non-uniform sections that cannot be strengthened by cold work.
Applications include hangers, landing nipples, side pocket mandrels and polished bore receptacles in sour gas service, where it resists the effects of hydrogen sulfide, chlorides and carbon dioxide. The alloy is also attractive for high strength fasteners in marine applications, where it resists corrosion, pitting and crevice attack in sea water.
Product forms include bar, seamless tubing, and plate.
Standards
- UNS N07725
- ASTM B637
- NACE MR0175
Characteristics
- Highly resistant to corrosion
- Age hardenable for extremely high strength
Physical Properties
- Density: 0.300 LB/in³ (8.3 g/cm³)
- Melting Range: 2320-2449 °F (1271-1343°C)
- Modulus of Elasticity: 29.6 x10⁶psi
- Magnetic Permeability: 1.0010 Max
Chemical Composition
C
Mn
S
P
Si
Cr
Ni
Al
Mo
Co
Ti
Fe
Mechanical Properties
KSI (MPa)
KSI (MPa)
HRC
Specialty Steel Supply makes all reasonable efforts to ensure the accuracy and correctness of the data found on this website and the associated documents but makes no representations or warranties as to the data’s accuracy, correctness or reliability. All data are for general information only and not for providing design advice. It is the responsibility of the user to test specific alloys under actual service conditions to determine their suitability for a particular purpose.
Stainless and Alloys
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