Inconel® Super-Alloys

Uncategorised / Thursday, July 28th, 2016

inconel 718 supplies tube pipe bar sheet plate

As well being leading UK stockholders for the most common metals, Metal Supplies are also suppliers of less common, niche alloys such as those in the Inconel® family of nickel-chromium-based super-alloys. These include (but are not limited to) the following grades and products:


  • Inconel 718
  • Inconel 600 / 601
  • Inconel X750
  • Inconel 825
  • Inconel 617
  • Inconel 800
  • Inconel 690
  • Inconel 625
  • Inconel 713c
  • Inconel 718
  • Inconel 738
  • Inconel 686
  • Inconel 939
  • Inconel 792
  • Inconel 602
  • Inconel 722


  • Inconel tubing / pipe
  • Inconel wire
  • Inconel bar
  • Inconel plate
  • Inconel sheet

Inconel® Properties

Particularly suited for applications where extreme environmental conditions mean considerable pressure and heat, austenite Inconel® alloys are oxidation and corrosion resistant, and when heated develop a thick, stable oxide layer which protects the Inconel®’s surface from further attack.

No creep

Whereas most metals such as aluminium or steel grades would succumb to creep as a result of thermally induced crystal vacancies, Inconel® metal maintains high levels of strength over even at incredibly high temperatures. In order to develop these high temperature properties, Inconel® alloys typically undergo either solid solution strengthening treatment or precipitation hardening.


While each variation of Inconel® has unique traits that make it effective in different circumstances, the majority of the alloys are used frequently in the chemical industry.


Inconel® 601 Properties & Composition

Like Inconel® 600, Inconel® 601 offers resistance to various forms of high-temperature corrosion and oxidization. However, unlike 600, this nickel-chromium alloy has an addition of aluminum. This addition allows it to demonstrate high mechanical properties even in extremely hot environments. Inconel® 601’s ability to stave off the strain that would occur in many alloys when exposed to high temperatures has led to its use in furnaces and heat treating equipment.

Inconel® 625 Properties & Composition

Inconel® 625 differs from many of the other Inconel® alloys because its composition includes substantial amounts of nickel, chromium, and molybdenum. It also has an addition of niobium. The result is an alloy that possesses high levels of strength without ever having to go through a strengthening heat treatment. Inconel® 625 is especially effective at resisting crevice corrosion, making it a chosen material in the aerospace and marine engineering industries.

Inconel® 690 Properties & Composition

The high chromium content in 690 makes it especially resistant to corrosion that occurs from salts, oxidizing acids, and other elements commonly found in aqueous environments. It can endure the sulfidation that takes place at high temperatures and due to anticorrosive properties 690 enjoys strong metallurgical stability which allows it to retain structural integrity in various applications.

Inconel® 718 Properties & Composition

Inconel® 718 has high levels of iron, molybdenum, and niobium as well as traces of titanium and aluminium. Inconel® 718 is designed to provide a high level of strength and flexibility, this allows it to be particularly resistant to post-weld cracking and ideal in both high-temperature and aqueous environments.

Inconel® 722 Properties & Composition

Inconel® 722 is a nickel-chromium alloy that shares many of the same properties as other Inconel® alloys. Inconel® 722 can withstand the stress caused by numerous types of acids, which has made it popular in the chemical industry.


To discuss you Inconel® requirements or to enquire about any other of our products or services, please call our sales team on 0800 021 7010 at your convenience on or email us at


Inconel® is a registered trademark of Special Metals Corporation.