Inconel 725

INCONEL 725

General

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. Alloy 725 is used for hangers, landing nipples and high strength fasteners in marine applications.

Chemical Composition

Cr

C

Si

Mn

Fe

Ti

Al

Ni

P

S

Mo

Min %

19.00

Bal.

1.00

 

55.00

7.00

Max %

22.50

0.03

0.20

0.35

1.70

0.35

59.00

0.015

0.010

9.50

Other Elements

Nb 2.75-4.00

 

Mechanical Properties (Age Hardened Typical Values)

MPa

%

Tensile Strength.

1241

 

Yield Strength (0.2% offset)

917

 

Elongation in 2” (50mm) or 4D

 

30

Charpy Impact

92 Joules

 

 

 

Hardness

36 HRC

 

 

Alternative Designations

Alloy 725, ASTM B 805, ASME Code Case 2217, SMC Specification HA91, ASME Code Case 2217, UNS N07725, Inconel 725

The data contained in this publication is for informational purposes only and may be revised at any time without prior notice. The data is believed to be accurate and reliable, but Hague Fasteners Limited makes no representation or warranty of any kind (express or implied) and assumes no liability with respect to the accuracy or completeness of the information contained herein. Although the data is believed to be representative of the product, the actual characteristics or performance of the product may vary from what is shown in this publication. Nothing contained in this publication should be construed as guaranteeing the product for a particular use or application.