X2CrNiMoCuWN25-7-4
1.4501Super duplex stainless with W + Cu addition — trade name Zeron 100 (Rolled Alloys). PREN >41 — even higher than SAF 2507 (1.4410) due to tungsten contribution. Outstanding pitting, crevice, and stress corrosion cracking resistance in hot seawater and aggressive chlorides. Used for subsea oil/gas equipment, seawater desalination, FGD systems, and chemical tankers in the most aggressive chloride environments.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | UNS | USA | UNS S32760 / Zeron 100 | S32760 | REF |
| 🇪🇺 | EN | Europe | X2CrNiMoCuWN25-7-4 / 1.4501 | 1.4501 | 100% |
Sources: ASTM A240, EN 10088-3
Chemical composition comparison (wt%)
Side-by-side: X2CrNiMoCuWN25-7-4 (EN) (EN 10088-3) vs X2CrNiMoCuWN25-7-4 / 1.4501 (EN) (EN 10088-3)
| Element | X2CrNiMoCuWN25-7-4 (EN) | X2CrNiMoCuWN25-7-4 / 1.4501 (EN) | Overlap |
|---|---|---|---|
| C | 0–0.03% | 0–0.03% | OK |
| Si | 0–1% | 0–1% | OK |
| Mn | 0–1% | 0–1% | OK |
| Cr | 24–26% | 24–26% | OK |
| Mo | 3–4% | 3–4% | OK |
| Ni | 6–8% | 6–8% | OK |
| W | 0.5–1% | 0.5–1% | OK |
| Cu | 0.5–1% | 0.5–1% | OK |
| N | 0.2–0.3% | 0.2–0.3% | OK |
Mechanical properties
Solution annealed
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | ≥ 750 | MPa |
| Yield Strength | ≥ 550 | MPa |
| Elongation | ≥ 20 | % |
| Elastic Modulus | ≥ 200 | GPa |
| Density | ≥ 7.84 | g/cm3 |
Compatibility verdict
X2CrNiMoCuWN25-7-4 and X2CrNiMoCuWN25-7-4 / 1.4501: 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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