X12CrNi25-21
1.4845Heat-resistant 25Cr-21Ni austenitic stainless — AISI 310S (low-C variant). Oxidation resistance to 1050°C continuous, 1150°C intermittent. Higher Cr+Ni than 304/316 = much better high-temperature scaling resistance. Used for furnace parts, radiant tubes, heat treatment fixtures, kiln linings, and thermocouple protection tubes. Also used in petrochemical cracker tubes.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | AISI | USA | AISI 310S / UNS S31008 | S31008 | REF |
| 🇪🇺 | EN | Europe | X12CrNi25-21 / 1.4845 | 1.4845 | 100% |
Sources: ASTM A240, EN 10095
Chemical composition comparison (wt%)
Side-by-side: X12CrNi25-21 (EN) (EN 10095) vs X12CrNi25-21 / 1.4845 (EN) (EN 10095)
| Element | X12CrNi25-21 (EN) | X12CrNi25-21 / 1.4845 (EN) | Overlap |
|---|---|---|---|
| C | 0–0.15% | 0–0.15% | OK |
| Si | 0–1.5% | 0–1.5% | OK |
| Mn | 0–2% | 0–2% | OK |
| Cr | 24–26% | 24–26% | OK |
| Ni | 19–22% | 19–22% | OK |
Mechanical properties
Solution annealed
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 490–690 | MPa |
| Yield Strength | ≥ 190 | MPa |
| Elongation | ≥ 35 | % |
| Elastic Modulus | ≥ 200 | GPa |
| Density | ≥ 7.9 | g/cm3 |
Compatibility verdict
X12CrNi25-21 and X12CrNi25-21 / 1.4845: 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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