Inconel grades are nickel-based alloys, primarily alloyed with chromium. Inconel is a trademark of Special Metals Corporation, and the family runs to around twenty grades, of which Inconel 718 and Inconel 625 are the best known and most widely used.
What Inconel is made of
Inconel alloys are primarily nickel, with chromium as the secondary element. They also contain small amounts of iron, molybdenum, copper and cobalt, plus trace additions such as titanium and aluminium.
Key properties
That combination of elements gives Inconel a highly attractive set of properties:
- High-temperature resistance, allowing it to withstand the extreme temperatures seen in gas turbines, jet engines and nuclear reactors.
- Corrosion resistance, whether to corrosive wet environments or to oxidation in hot dry environments, suiting demanding use in the chemical process industries, marine applications and aerospace components.
- Good mechanical strength, most of which is retained at higher temperatures, so it also resists creep under prolonged exposure to high temperatures and mechanical loads.
What we stock
We stock Alloy 625 and Alloy 718 as round bar from 5/8" to 10" diameter (15.87-254mm), and Alloy 725 as round bar from 1" to 4" diameter (25.4-101.6mm).