X2CrMoTi18-2
1.4521Ti-stabilized ferritic stainless with Mo — 18% Cr + 2% Mo + Ti. Best pitting resistance in the ferritic family (PREN ~25, comparable to 316L austenitics). Ti stabilization prevents sensitization after welding. Used as cost-effective replacement for 316L in hot water systems, solar collectors, catering equipment, and automotive exhaust heat exchangers. No Ni = lower cost than austenitic.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | AISI | USA | AISI 444 / UNS S44400 | S44400 | REF |
| 🇪🇺 | EN | Europe | X2CrMoTi18-2 / 1.4521 | 1.4521 | 100% |
Sources: ASTM A240, EN 10088-2
Chemical composition comparison (wt%)
Side-by-side: X2CrMoTi18-2 (EN) (EN 10088-2) vs X2CrMoTi18-2 / 1.4521 (EN) (EN 10088-2)
| Element | X2CrMoTi18-2 (EN) | X2CrMoTi18-2 / 1.4521 (EN) | Overlap |
|---|---|---|---|
| C | 0–0.025% | 0–0.025% | OK |
| Si | 0–1% | 0–1% | OK |
| Mn | 0–1% | 0–1% | OK |
| Cr | 17–20% | 17–20% | OK |
| Mo | 1.8–2.5% | 1.8–2.5% | OK |
| Ni | 0–0.5% | 0–0.5% | OK |
| Ti | ≤ 0.8% | ≤ 0.8% | OK |
Mechanical properties
Annealed
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 400–600 | MPa |
| Yield Strength | ≥ 250 | MPa |
| Elongation | ≥ 18 | % |
| Elastic Modulus | ≥ 220 | GPa |
| Density | ≥ 7.7 | g/cm3 |
Compatibility verdict
X2CrMoTi18-2 and X2CrMoTi18-2 / 1.4521: 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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