INCONEL® Alloy 725

UNS N07725

A nickel-chromium-molybdenum-niobium alloy that is highly resistant to corrosion and is age hardenable for extremely high strength. The strength of this alloy is developed by heat treatment to achieve high ductility and toughness. The alloy is resistant to hydrogen embrittlement and stress-corrosion cracking. Used for hangers, landing nipples, side pocket mandrels and polished bore receptacles in sour gas service. Also used for high-strength fasteners in marine applications.

Stock program

Bars according to API 6A

  • 203.20 mm
  • 254.00 mm
  • 304.80 mm

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Limiting
Ni 55.00 - 59.00 %
Cr 19.00 - 22.50 %
Mo 7.0 - 9.50 %
Nb 2.75 - 4.00 %
Ti 1.00 - 1.70 %
Al max. 0.35 %
C max. 0.03 %
Mn max. 0.35 %
Si max. 0.20 %
P max. 0.015 %
S max. 0.010 %
Fe Balance*    
     
*Reference to the ‘balance’ of a composition does not guarantee this      
is exclusively of the element mentioned but that it predominates and      
others are present only in minimal quantities.      
Density
g/cm³   8.31
lb/in³   0.300
Recommended Welding Products
Filler Metal INCO-WELD® 725NDUR®