Austenitic heat-resistant
1.4893
253 MA
X9CrNiSiNCe21-11-2
High-temperature austenitic (253 MA family) with nitrogen and rare earths for strength and oxidation resistance at 850–1100 °C; casting/forging variant of 1.4835.
Chemical composition
mass %| Element | Content |
|---|---|
| CCarbon | 0.05–0.12 |
| SiSilicon | 1.4–2.5 |
| MnManganese | ≤1 |
| CrChromium | 20–22 |
| NiNickel | 10–12 |
| NNitrogen | 0.12–0.2 |
| CeCerium | 0.03–0.08 |
Mechanical properties
room temperature- Scaling temperature (°C)
- 1100
Standard equivalences
- DIN/EN
- X9CrNiSiNCe21-11-2
- AISI
- 253 MA
- UNS
- S30815
Typical applications
- Power-plant construction
- Oil and petrochemical service
- Furnace heat exchangers, air preheaters, recuperators
- Furnace and cracker tubes
Frequently asked questions
What is 1.4893 (253 MA)?
1.4893 (X9CrNiSiNCe21-11-2) — Austenitic heat-resistant. High-temperature austenitic (253 MA family) with nitrogen and rare earths for strength and oxidation resistance at 850–1100 °C; casting/forging variant of 1.4835.
Which grades are equivalent to 1.4893?
1.4893 corresponds to EN X9CrNiSiNCe21-11-2; equivalent designations: AISI 253 MA, UNS S30815.
Related grades
Indicative values — verify against the applicable standard before specifying.
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