Inconel Alloys
Aurico Alloys LLP supplies Inconel® from Mumbai in a full range of forms — sheet, plate, coil, strip, foil, bar, wire, tube and powder. Held in stock or arranged with the manufacturer, depending on grade and quantity.
Inconel is the nickel-chromium core of the superalloy range, and the widest family we stock. The useful first cut is between the solid-solution grades and the age-hardened ones. Solid-solution grades take their strength from what is dissolved in the matrix, stay easy to weld and form, and are chosen for corrosion or oxidation resistance. Age-hardened grades precipitate a strengthening phase during heat treatment, which buys a great deal of strength at temperature and costs fabricability.
Within that, 625 and 600 are the general-purpose corrosion and heat grades, 718 is the age-hardened workhorse for aerospace and downhole hardware, and the rest are specialists chosen for a particular environment or temperature.
Key Properties
- High strength retained to elevated temperature in the age-hardened grades, 718 and X-750
- Oxidation and carburisation resistance in the solid-solution grades, 600, 601 and 617
- Resistance to chloride pitting and stress-corrosion cracking, 625 in particular
- Weldability and formability in the solid-solution grades
- Supplied as sheet, plate, round bar, foil and gas-atomised powder
Grades Supplied
| Grade | UNS | Type | Chosen for |
|---|---|---|---|
| Inconel 600 | N06600 | Solid solution | Heat and oxidation resistance, chloride stress corrosion |
| Inconel 601 | N06601 | Solid solution | Aluminium added for higher oxidation resistance |
| Inconel 617 | N06617 | Solid solution | Creep strength above 900 °C |
| Inconel 625 | N06625 | Solid solution | The general-purpose grade; seawater, chemical and marine |
| Inconel 625 LCF | N06626 | Solid solution | Low cycle fatigue variant for bellows and expansion joints |
| Inconel 686 | N06686 | Solid solution | Higher molybdenum and tungsten for severe wet corrosion |
| Inconel 690 | N06690 | Solid solution | High chromium for nuclear steam generator service |
| Inconel 693 | N06693 | Solid solution | Metal dusting resistance in syngas and reformer service |
| Inconel 718 | N07718 | Age hardened | The workhorse; strength to about 700 °C and weldable |
| Inconel 725 | N07725 | Age hardened | Corrosion resistance of 625 with age-hardened strength |
| Inconel 740H | N07740 | Age hardened | Advanced ultra-supercritical boiler service |
| Inconel 751 | N07751 | Age hardened | Exhaust valves and high-temperature fasteners |
| Inconel 783 | R30783 | Controlled expansion | Oxidation resistant with low thermal expansion |
| Inconel X-750 | N07750 | Age hardened | Age-hardened spring and high-temperature bolting grade |
Designations are as stated on each grade page. Confirm the specification against the mill certificate for the batch supplied.
Available Forms
Where These Alloys Are Used
- Aerospace — turbine casings, rings, fasteners and exhaust components
- Oil and gas — downhole tools, wellhead hardware and sour service tubulars
- Chemical processing — reactors, heat exchangers and acid service piping
- Marine — seawater systems and splash zone hardware, generally in 625
- Power generation — superheaters, reheaters and steam generator tubing
- Additive manufacturing — gas atomised powder in 718 and 625
Certification and Cutting
Material is supplied against EN 10204 3.1 mill test certificates, with chemical composition and mechanical properties for the batch. Cutting to size is done in house.
Ask for a Quotation
Tell us the grade, the form, the size and the quantity, and we will confirm availability, lead time and price. Contact us for stock availability, pricing and material test certificates.