Summary
The two alloys share almost the same chemistry and both appear in oil and gas, which makes them easy to confuse. 925 is used where 825 is not strong enough, mostly as bar for downhole and valve components.
Read titanium on every piece. See Incoloy 825 scrap and Incoloy 925 scrap.
Side by Side
| Incoloy 825 | Incoloy 925 | |
|---|---|---|
| Nickel | About 42% | About 44% |
| Titanium | About 0.9% | About 2.1% |
| Strengthening | Solid solution | Precipitation hardened |
| Typical service | Acid plant, clad pipe, tubing | Downhole tools, valve stems, fasteners |
| Common scrap forms | Pipe, tube, plate | Bar ends, turnings, forgings |
Composition Compared
Nominal compositions compared element by element. Values are the nominal figures from each grade page; change either grade to compare others.
On a handheld XRF: the clearest differences between Incoloy 825 and Incoloy 925 are iron (30.35% vs 27.8%), nickel (42% vs 44%) and titanium (0.9% vs 2.1%). Light elements such as aluminium, silicon, carbon and nitrogen need a light-element instrument, OES or a laboratory.
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 Incoloy 825 and Incoloy 925?
Incoloy 925 is the age-hardenable version of 825. Both carry about 42–44% nickel, 21% chromium, 3% molybdenum and 2% copper on an iron base, but 925 adds about 2.1% titanium.
Can Incoloy 825 and Incoloy 925 scrap be mixed?
No. Keep them separate. Keep Incoloy 825 and Incoloy 925 in separate bags or drums; a buyer who finds both in one lot will ask for a re-sort or value it as mixed.
What are the UNS numbers of Incoloy 825 and Incoloy 925?
Incoloy 825 is UNS N08825 and Incoloy 925 is UNS N09925.
Which has more nickel, Incoloy 825 or Incoloy 925?
Incoloy 925, with about 44% nickel against about 42% in Incoloy 825, using the nominal values on this site.
Sources and Review
Composition figures on this page are the nominal values from each grade's own page on this site, where the producer datasheet or standard is named in full. The comparison widget reads the same values. The sources behind the grades are listed below.
- Special Metals Corporation, INCOLOY alloy 825 (SMC-030, 2004): Incoloy 825 Buyer, Importer and Exporter
- Special Metals Corporation, INCOLOY alloy 925 (SMC-070, 2004): Incoloy 925 Buyer, Importer and Exporter
Published by Mipra Steel, Khetwadi, Mumbai · Last updated