Summary
Both alloys turn up in the same plants, particularly in flue-gas desulfurization scrubbers and chemical process equipment, so mixed bins of the two are common. They look identical, and both are non-magnetic, so the separation has to come from chemistry.
For value, C-276 carries much more molybdenum and adds tungsten, both payable elements. A piece of C-276 in a 625 lot is not a disaster for the buyer’s chemistry, but it is money the seller gives away. Read every piece and keep them apart. See Inconel 625 scrap and Hastelloy C-276 scrap.
Side by Side
| Inconel 625 | Hastelloy C-276 | |
|---|---|---|
| Main alloying | Cr 21.5%, Mo 9%, Nb 3.6% | Mo 16%, Cr 15.5%, W 3.75% |
| Iron | About 4% | About 5.5% |
| Key XRF marker | Niobium present, no tungsten | Tungsten present, no niobium |
| Typical service | Offshore pipe, scrubbers, chemical plant | FGD scrubbers, chlorination, pickling plant |
| Common scrap forms | Pipe, plate, clad pipe, turnings, bar ends | Plate, sheet, tube bundles, pipe |
Composition Compared
Nominal compositions compared element by element. Change either grade to compare others.
On the XRF
Switch the grade to see how the fingerprint changes. See how XRF sorts nickel alloys.
FAQ
What is the main difference between Inconel 625 and Hastelloy C-276?
Inconel 625 carries about 21.5% chromium, 9% molybdenum and 3.6% niobium. Hastelloy C-276 carries about 16% molybdenum, 15.5% chromium and 3.75% tungsten, with no niobium.
Can Inconel 625 and Hastelloy C-276 scrap be mixed?
No. Keep them separate. A melter buying either one needs its chemistry to stay within the grade’s limits, and mixing can mean a re-sort or a different valuation.