Summary
Nimonic 75 is a sheet and fabrication alloy; 80A is a stronger age-hardened alloy for rotating and highly loaded parts. They share the same Ni-20Cr base, so the minor elements decide.
The titanium difference shows on a handheld XRF. Confirm aluminium with OES if the buyer needs it. See Nimonic 75 scrap and Nimonic 80A scrap.
Side by Side
| Nimonic 75 | Nimonic 80A | |
|---|---|---|
| Chromium | About 20% | About 19.5% |
| Titanium | About 0.4% | About 2.25% |
| Aluminium | Trace | About 1.4% |
| Strengthening | Solid solution | Precipitation (γ′) |
| Typical service | Turbine sheet parts, furnace fixtures | Turbine blades and rings, exhaust valves, bolts |
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 Nimonic 75 and Nimonic 80A?
Both are nickel with about 20% chromium. Nimonic 80A adds about 2.25% titanium and 1.4% aluminium for age hardening; Nimonic 75 has only about 0.4% titanium.
Can Nimonic 75 and Nimonic 80A 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.