1.4828
1.4828 (X15CrNiSi20-12) is a heat-resisting austenitic steel to EN 10095. Around 20 % chromium together with the raised silicon content forms a tightly adhering oxide layer – in air the material is therefore scaling-resistant to about 1000 °C.
Application & properties
1.4828 is a silicon-alloyed austenitic steel for the hot gas path – scaling-resistant to about 1000 °C, but not designed for pressure-bearing components in the creep range.
- Furnace construction: muffles, hearth plates, annealing baskets and charging frames
- Recuperators, radiant tubes and heat-treatment plant
- Flue-gas ducts and hot-gas lines
- Waste-to-energy: components on the hot gas side
Tell us the medium, temperature and pressure – we will check the grade with you.
Chemical composition
Typical values in wt.-% per EN standard (heat analysis).
| Element | Content (%) |
|---|---|
| C | ≤ 0.20 |
| Si | 1.50–2.50 |
| Mn | ≤ 2.00 |
| P | ≤ 0.045 |
| S | ≤ 0.015 |
| Cr | 19.0–21.0 |
| Ni | 11.0–13.0 |
Mechanical properties
Typical values at room temperature per EN standard.
| Property | Value |
|---|---|
| Yield strength Rp0.2 | ≥ 230 MPa |
| Tensile strength Rm | 550–750 MPa |
| Elongation A | ≥ 30 % |
Standards, equivalents & product forms
| Topic | Detail |
|---|---|
| Standards | EN 10095 (heat-resisting steels) |
| ASME/ASTM equivalent | ~ AISI 309 (related) |
| Material no. | 1.4828 |
| Short name / aka | X15CrNiSi20-12 · heat-resisting austenite |
Heat-resisting is not the same as creep-resistant: EN 10095 describes resistance to scaling in hot gas, not creep rupture strength under pressure. For pressure-bearing components in the creep range, choose a creep-resistant grade with design values to AD 2000 or EN 13445. Prolonged service between roughly 600 and 850 °C can cause sigma-phase embrittlement, and sulphur-bearing atmospheres can cause sulphidation – we are happy to clarify both with you beforehand.
We supply 1.4828 as pipes, flanges and fittings – seamless or welded, on request with an EN 10204 3.1 / 3.2 mill certificate.
Supply programme & machining
| Item | Details |
|---|---|
| Dimensions (pipe) | Programme range: outside Ø 10.2 to 2,540 mm · DN 6 to DN 2000 · all standard wall thicknesses; available sizes depend on grade and standard |
| As flange & fitting | DN 10 to DN 1200 · PN 6 to PN 400 · Class 150 to Class 2500 to ASME B16.5 |
| Lengths & cutting | Mill lengths, sawn fixed lengths and fitting pieces from 0.1 to 12 m – sawn and bevelled |
| Minimum quantity | From a single item – from one fitting piece to the complete piping system |
| Availability | Common grades and sizes available at short notice, special sizes procured per project |
| Lead time | Standard sizes usually 3–5 working days; the binding date is confirmed with the quote |
| Machining | Sawing and bevelling, Victaulic roll grooving, threading to EN 10226, drilling, facing, bending with special radii |
| Surface | Blasting, coating and marking to customer specification |
| Certificates | Mill certificate 2.2, inspection certificate 3.1 to EN 10204 (standard with machining), 3.2 with notified body on request |
| Testing | Non-destructive testing by ultrasound, eddy current and X-ray, pressure test report on request |
These figures describe our supply programme. Which size is actually available in this grade is clarified with your enquiry – you usually receive the quote the same day.
We clarify availability, price and inspection certificate with your enquiry.
Frequently asked questions about 1.4828
Up to what temperature can 1.4828 be used?
1.4828 is scaling-resistant in air to about 1000 °C. That is a statement about oxidation resistance, not strength – for pressure-bearing components in the creep range a creep-resistant grade must be chosen.
What is the difference between heat-resisting and creep-resistant?
Heat-resisting steels to EN 10095 withstand scaling in hot gas. Creep-resistant steels such as 16Mo3 or 10CrMo9-10 are designed for creep rupture strength under pressure. 1.4828 belongs to the first group.
Request 1.4828?
Grade, standard, size, pressure rating and quantity are enough – on request with an EN 10204 3.1 / 3.2 mill certificate. Your quote usually the same day.
All data are typical values per the relevant EN standards for first orientation – without warranty. The applicable standard and the mill certificate of the delivery are decisive.