Austenitic heat-resistant
1.4878
TP 321H
X8CrNiTi18-10
Titanium-stabilised austenitic for elevated temperature (321H) with good scaling resistance and hot strength.
Chemical composition
mass %| Element | Content |
|---|---|
| CCarbon | ≤0.12 |
| SiSilicon | ≤1 |
| MnManganese | ≤2 |
| PPhosphorus | ≤0.045 |
| SSulphur | ≤0.03 |
| TiTitanium | 5×C – 0.8 |
| CrChromium | 17–19 |
| NiNickel | 9–12 |
Mechanical properties
room temperature- Scaling temperature (°C)
- 850
Standard equivalences
- DIN/EN
- X8CrNiTi18-10
- AISI
- 321H
- UNS
- S32100
- SS
- 2337
- AFNOR
- Z6 CNT 18.12
- BS
- 321 S51
- PN
- 1H18N9T
Typical applications
- Industrial furnace and apparatus construction
- Steelworks and smelters
- Power-plant, oil and petrochemical service
- Air preheaters, recuperators, furnace tubes
Frequently asked questions
What is 1.4878 (TP 321H)?
1.4878 (X8CrNiTi18-10) — Austenitic heat-resistant. Titanium-stabilised austenitic for elevated temperature (321H) with good scaling resistance and hot strength.
Which grades are equivalent to 1.4878?
1.4878 corresponds to EN X8CrNiTi18-10; equivalent designations: AISI 321H, UNS S32100, SS 2337, AFNOR Z6 CNT 18.12, BS 321 S51, PN 1H18N9T.
Related grades
Indicative values — verify against the applicable standard before specifying.
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