Alloy 625

Alloy 625, commonly known as INCONEL® 625, is a Ni-Cr- Mo alloy that is used for its high strength, high toughness, and its oxidation and corrosion resistance. Strength of alloy 625 is derived from the stiffening effect of molybdenum and niobium on its nickel-chromium matrix. Although the alloy was developed for high temperature strength, its highly alloyed composition provides a high level of general corrosion resistance. Applications include and are not limited to: sea water applications, aerospace, chemical processing, and nuclear.

UNS: N06625
Stock Sizes: 1/8” – 3/4” OD


  • Seamless Tube: ASTM B444
  • NACE MR0175/MR0103

Available Processing:

  • Cold Worked and Bright Annealed (Gr.1 Annealed or Gr.2 Solution Annealed)
  • Cold Worked

Common Testing: Eddy Current, Flare, Flattening, Positive Material Identification

Chemical Composition (%)

Iron (Fe)5% Max
Chromium (Cr)20-23%
Nickel (Ni)58% Min
Manganese (Mn)0.50% Max
Silicon (Si)0.50% Max
Carbon (C)0.10% Max
Sulfur (S)0.015% Max
Phosphorus (P)0.015% Maz
Cobalt (Co)1% Max
Molybdenum (Mo)8-10%
Aluminum (Al)0.40% Max
Titanium (Ti)0.40% Max
(Nb) + Tantalum (Ta)

Physical Properties

Density (lb/in3)0.305
Elongation (min %)30
Minimum Yield (psi) – Gr. 160,000
Minimum Yield (psi) – Gr. 240,000
Minimum Tensile (psi) – Gr. 1120,000
Minimum Tensile (psi) – Gr. 2100,000
Max Hardness (HRB)100