Nickel Alloy 625, Inconel 625


Alloy 625 is a popular nickel-chromium alloy that offers users a high level of strength and ease of fabrication. Also sold by Continental Steel as Inconel® 625, alloy 625 is known for a number of different unique properties including:

  • Strength due to addition of molybdenum and niobium
  • Outstanding thermal fatigue strength
  • Resistance to oxidation and a wide range of corrosive elements
  • Ease of joining through all types of welding
  • Handles a wide range of temperatures from cryogenic to 1800°F (982°C)

Because of its versatility, a number of industries utilize alloy 625 including nuclear power production, marine/boating/undersea, and aerospace. Within in these critical industries you can find Nickel Alloy 625 and Inconel 625 in various applications including:

  • Nuclear reactor-cores and control-rod components
  • Wire rope for cables and blades on Naval crafts such as gunboats and subs
  • Oceanographic equipment
  • Rings and tubing for environmental control systems
  • Meets ASME code for Boiler and Pressure Vessels

In order to be considered alloy 625, an alloy must have a certain chemical composition which includes:

  • Ni 58% min
  • Cr 20-23%
  • Fe 5% max
  • Mo 8-10%
  • Nb 3.15-4.15%
  • Co 1% max
  • Si .50 max
  • P and S 0.15% max