Austenitic heat-resistant
1.4948 TP 304H X6CrNi18-11
Controlled-carbon 304 for elevated-temperature service (304H) with improved creep strength for pressure parts.
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Chemical composition
mass %| Element | Content |
|---|---|
| CCarbon | 0.04–0.08 |
| SiSilicon | ≤0.75 |
| MnManganese | ≤2 |
| CrChromium | 17–19 |
| NiNickel | 10–12 |
| PPhosphorus | ≤0.035 |
| SSulphur | ≤0.015 |
Mechanical properties
room temperature- Rp0.2 min (N/mm²)
- 185
- Rm (N/mm²)
- 500–700
- Elongation A% (longitudinal)
- 40
A measured at L0 = 5 d0.
Standard equivalences
- DIN/EN
- X6CrNi18-11
- AISI
- 304H
- UNS
- S30409
- AFNOR
- X6CrNi18-10
- BS
- 304 S50
Typical applications
- Power-plant and reactor construction
- Components for thermal power plant
- Valves, discs, housings
- Superheater, heat-exchanger and steam-line tubes
Frequently asked questions
What is 1.4948 (TP 304H)?
1.4948 (X6CrNi18-11) — Austenitic heat-resistant. Controlled-carbon 304 for elevated-temperature service (304H) with improved creep strength for pressure parts.
Which grades are equivalent to 1.4948?
1.4948 corresponds to EN X6CrNi18-11; equivalent designations: AISI 304H, UNS S30409, AFNOR X6CrNi18-10, BS 304 S50.
Related grades
Indicative values — verify against the applicable standard before specifying.
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