Austenitic heat-resistant
1.4845
TP 310S
X8CrNi25-21
Heat-resistant austenitic Cr-Ni grade with good scaling resistance and high hot strength.
Chemical composition
mass %| Element | Content |
|---|---|
| CCarbon | ≤0.15 |
| SiSilicon | ≤0.75 |
| MnManganese | ≤2 |
| PPhosphorus | ≤0.045 |
| SSulphur | ≤0.03 |
| CrChromium | 24–26 |
| NiNickel | 19–22 |
Mechanical properties
room temperature- Scaling temperature (°C)
- 1050
Standard equivalences
- DIN/EN
- X8CrNi25-21
- AISI
- 310S
- UNS
- S31008
- SS
- 2361
- AFNOR
- Z12 CN 25.20
- BS
- 310 S24
- PN
- H23N18
Typical applications
- Industrial furnace and apparatus construction
- Thermowell tubes, steelworks and smelters
- Air preheaters, recuperators, furnace tubes
- Protection tubes for electric resistance heating
Frequently asked questions
What is 1.4845 (TP 310S)?
1.4845 (X8CrNi25-21) — Austenitic heat-resistant. Heat-resistant austenitic Cr-Ni grade with good scaling resistance and high hot strength.
Which grades are equivalent to 1.4845?
1.4845 corresponds to EN X8CrNi25-21; equivalent designations: AISI 310S, UNS S31008, SS 2361, AFNOR Z12 CN 25.20, BS 310 S24, PN H23N18.
Related grades
Indicative values — verify against the applicable standard before specifying.
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