X15CrNiSi25-4
1.4821Heat-resistant duplex (austenitic-ferritic) stainless — 25Cr-4Ni-1.5Si. Si addition improves oxidation resistance at high temperature. Used for furnace components, burner nozzles, heat treatment fixtures, and kiln supports operating at 800-1000°C. Higher strength than fully austenitic heat-resistant grades at intermediate temperatures due to duplex structure.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇪🇺 | EN | Europe | X15CrNiSi25-4 / 1.4821 | 1.4821 | 100% |
Sources: EN 10095
Chemical composition comparison (wt%)
Side-by-side: X15CrNiSi25-4 (EN) (EN 10095) vs X15CrNiSi25-4 / 1.4821 (EN) (EN 10095)
| Element | X15CrNiSi25-4 (EN) | X15CrNiSi25-4 / 1.4821 (EN) | Overlap |
|---|---|---|---|
| C | 0.05–0.2% | 0.05–0.2% | OK |
| Si | 1–2% | 1–2% | OK |
| Mn | 0–1.5% | 0–1.5% | OK |
| Cr | 24–26% | 24–26% | OK |
| Ni | 3.5–5.5% | 3.5–5.5% | OK |
| N | 0.05–0.2% | 0.05–0.2% | OK |
Mechanical properties
Solution annealed
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 600–850 | MPa |
| Yield Strength | ≥ 400 | MPa |
| Elongation | ≥ 15 | % |
| Density | ≥ 7.7 | g/cm3 |
Compatibility verdict
X15CrNiSi25-4 and X15CrNiSi25-4 / 1.4821: 100% composition match
Close equivalents but NOT identical.
Related materials
304 Stainless Steel
1.4301The most widely used austenitic stainless steel. Excellent corrosion resistance, good formability and weldability. Standard choice for food processing, chemical, and architectural applications.
316L
1.4404Low-carbon austenitic stainless steel with molybdenum addition. Superior corrosion resistance to 304, especially against chlorides and pitting. Standard choice for chemical processing, marine, medical implants, and pharmaceutical equipment.
430 Stainless Steel
1.4016Ferritic chromium stainless steel with good corrosion resistance and formability. Lower cost than austenitic grades. Used for automotive trim, kitchen sinks, architectural panels, and appliance components.
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