X1NiCrMoCuN25-20-7
1.4529Super austenitic 6Mo+Cu stainless — Alloy 926 / Incoloy 25-6MO. Enhanced version of 904L with higher Mo (6-7%) and N (0.15-0.25%). PREN 41-48 — rivaling super duplex but fully austenitic. Ni 24-26% eliminates stress corrosion cracking. Used for seawater systems, FGD, phosphoric acid production, offshore hydraulics, and salt extraction. Service -196 to +400°C.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | UNS | USA | UNS N08926 / Alloy 926 | N08926 | REF |
| 🇪🇺 | EN | Europe | X1NiCrMoCuN25-20-7 / 1.4529 | 1.4529 | 100% |
Sources: ASTM B625, EN 10088-3
Chemical composition comparison (wt%)
Side-by-side: X1NiCrMoCuN25-20-7 (EN) (EN 10088-3) vs X1NiCrMoCuN25-20-7 / 1.4529 (EN) (EN 10088-3)
| Element | X1NiCrMoCuN25-20-7 (EN) | X1NiCrMoCuN25-20-7 / 1.4529 (EN) | Overlap |
|---|---|---|---|
| C | 0–0.02% | 0–0.02% | OK |
| Mn | 0–2% | 0–2% | OK |
| Cr | 19–21% | 19–21% | OK |
| Mo | 6–7% | 6–7% | OK |
| Ni | 24–26% | 24–26% | OK |
| Cu | 0.5–1.5% | 0.5–1.5% | OK |
| N | 0.15–0.25% | 0.15–0.25% | OK |
Mechanical properties
Solution annealed
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | ≥ 650 | MPa |
| Yield Strength | ≥ 300 | MPa |
| Elongation | ≥ 35 | % |
| Elastic Modulus | ≥ 195 | GPa |
| Density | ≥ 8.1 | g/cm3 |
Compatibility verdict
X1NiCrMoCuN25-20-7 and X1NiCrMoCuN25-20-7 / 1.4529: 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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