X6CrNiMoNb17-12-2
1.4580Niobium-stabilized austenitic stainless with Mo — 316+Nb. Nb stabilization prevents sensitization (like 347) PLUS Mo gives pitting resistance (like 316). Best of both worlds for high-temperature welded chemical plant. Used for welded pressure vessels, heat exchangers, and piping operating at 400-800°C in mildly corrosive environments.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇪🇺 | EN | Europe | X6CrNiMoNb17-12-2 / 1.4580 | 1.4580 | 100% |
Sources: EN 10088-3
Chemical composition comparison (wt%)
Side-by-side: X6CrNiMoNb17-12-2 (EN) (EN 10088-3) vs X6CrNiMoNb17-12-2 / 1.4580 (EN) (EN 10088-3)
| Element | X6CrNiMoNb17-12-2 (EN) | X6CrNiMoNb17-12-2 / 1.4580 (EN) | Overlap |
|---|---|---|---|
| C | 0–0.08% | 0–0.08% | OK |
| Si | 0–1% | 0–1% | OK |
| Mn | 0–2% | 0–2% | OK |
| Cr | 16.5–18.5% | 16.5–18.5% | OK |
| Mo | 2–2.5% | 2–2.5% | OK |
| Ni | 10.5–13.5% | 10.5–13.5% | OK |
| Nb | ≤ 1% | ≤ 1% | OK |
Mechanical properties
Solution annealed
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 500–700 | MPa |
| Yield Strength | ≥ 200 | MPa |
| Elongation | ≥ 35 | % |
| Elastic Modulus | ≥ 200 | GPa |
| Density | ≥ 8 | g/cm3 |
Compatibility verdict
X6CrNiMoNb17-12-2 and X6CrNiMoNb17-12-2 / 1.4580: 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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