X12CrNiMoV12-3
1.4422Martensitic stainless for steam turbine blades and discs — 12Cr-3Ni-Mo-V. Higher Ni (2.5-3.5%) than X20Cr13 gives better toughness and corrosion resistance. V addition for creep strength at elevated temperatures. Used for LP/HP turbine blades, compressor discs, pump shafts, and valves in power generation. Service temperature to ~550°C.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇪🇺 | EN | Europe | X12CrNiMoV12-3 / 1.4422 | 1.4422 | 100% |
Sources: EN 10088-3
Chemical composition comparison (wt%)
Side-by-side: X12CrNiMoV12-3 (EN) (EN 10088-3) vs X12CrNiMoV12-3 / 1.4422 (EN) (EN 10088-3)
| Element | X12CrNiMoV12-3 (EN) | X12CrNiMoV12-3 / 1.4422 (EN) | Overlap |
|---|---|---|---|
| C | 0.08–0.15% | 0.08–0.15% | OK |
| Mn | 0–1% | 0–1% | OK |
| Cr | 11–12.5% | 11–12.5% | OK |
| Mo | 1.5–2% | 1.5–2% | OK |
| Ni | 2.5–3.5% | 2.5–3.5% | OK |
| V | 0.25–0.35% | 0.25–0.35% | OK |
Mechanical properties
QT
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 900–1100 | MPa |
| Yield Strength | 700–850 | MPa |
| Elongation | 12–16 | % |
| Elastic Modulus | ≥ 215 | GPa |
| Density | ≥ 7.7 | g/cm3 |
Compatibility verdict
X12CrNiMoV12-3 and X12CrNiMoV12-3 / 1.4422: 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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