UNS S21800 — The anti-galling stainless — where 304/316 seize, Nitronic 60 slides.
Nominal published values, annealed condition. Certified heat lots ship with actual MTC values.
| Property | Value |
|---|---|
| UNS number | S21800 |
| Family | Specialty & Pure Nickel |
| Nominal chemistry | Cr ~17% · Ni ~9% · Mn ~8% · Si ~4% · N ~0.1% |
| Min. yield strength | 345 MPa |
| Min. tensile strength | 655 MPa |
| Density | 7.62 g/cm³ |
Valve stems & seats
Wear rings
Fasteners subject to galling
All forms consolidated into one PO with matching heats and one MTC package.
Form, dimensions, quantity, standard — that is all we need. A named metallurgist replies with pricing, lead time and MTC sample.