About Smiths

We are a world-class supplier of engineering raw materials. Our objective is to provide all our customers, from the small machine shop to the large multi-national corporation, a supply path that continuously delivers the highest levels of service, quality and value.

Alloy 625 (Inconel® 625)

Nickel Chromium Molybdenum Alloy

Alloy 625 Nickel Alloy

Alloy 625 has proved to be a highly prized construction material because of its value in its ability to solve a wide variety of design and application issues.


Alloy 625 has outstanding corrosion resistance and is used extensively in the oil, gas and petrochemical sector, particularly in sour service and sour gas applications. With excellent weldability and high tensile strength, the material also offers resistance to both sulphide and chlorides stress cracking. The alloy is normally supplied in the annealed condition.

Corrosion Resistance

Alloy 625 has versatile resistance to corrosion which is outstanding, even in severely corrosive environments. The material also shows superior resistance to high-temperature effects such as oxidation and carburization. It is an excellent choice for seawater and sour gas applications.

Typical Applications

Commercial applications for this engineering material include:

  • Wellhead components
  • Propellers & shafts
  • Reactor core & control rod components
  • Sour service applications
  • Downhole equipment
  • Seawater heat exchangers
  • Sour gas pipelines
  • Superheater tubing

We stock Alloy 625 in round bar, plate, sheet and round tube.

Technical Assistance

Our knowledgeable staff and resident metallurgists will be pleased to assist you further on any technical topic. Smiths Metal Centres Limited also boasts an in-house UKAS Accredited Testing Laboratory which is unique within the multi-metal and plastic stockholding sector. We believe this underlines our total commitment to quality and our ethos of being the complete service provider.

Additional Info

A technical datasheet for Alloy 625 is available in PDF file format. To view and download, please click here.

We offer in-house processing options - for more information, please refer to our processing services.

Read our corporate brochure by clicking here.

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