X20CrMoV11-1
1.492212% Cr martensitic creep-resistant steel for steam turbine applications. Operates to ~580°C continuous. Combines corrosion resistance of 12% Cr with creep strength from Mo+V. Used for steam turbine blades, bolts, discs, and high-pressure steam piping in fossil power plants.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | ASTM | USA | ASTM A182 F122 (similar concept) | — | REF |
| 🇪🇺 | EN | Europe | X20CrMoV11-1 | 1.4922 | 100% |
Sources: ASTM A182, EN 10269:2013
Chemical composition comparison (wt%)
Side-by-side: X20CrMoV11-1 (EN) (EN 10269) vs X20CrMoV11-1 (EN) (EN 10269)
| Element | X20CrMoV11-1 (EN) | X20CrMoV11-1 (EN) | Overlap |
|---|---|---|---|
| C | 0.17–0.23% | 0.17–0.23% | OK |
| Si | 0–0.5% | 0–0.5% | OK |
| Mn | 0.3–0.8% | 0.3–0.8% | OK |
| P | 0–0.025% | 0–0.025% | OK |
| S | 0–0.015% | 0–0.015% | OK |
| Cr | 10–12.5% | 10–12.5% | OK |
| Mo | 0.8–1.2% | 0.8–1.2% | OK |
| Ni | 0.3–0.8% | 0.3–0.8% | OK |
| V | 0.25–0.35% | 0.25–0.35% | OK |
Mechanical properties
QT
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 690–840 | MPa |
| Yield Strength | ≥ 490 | MPa |
| Elongation | ≥ 15 | % |
| Elastic Modulus | ≥ 210 | GPa |
| Density | ≥ 7.73 | g/cm3 |
Heat treatment
| Process | Temperature | Medium | Holding Time | Notes |
|---|---|---|---|---|
| hardening | 1020–1070 °C | oil or air | — | 12% Cr allows air hardening |
| tempering | 700–750 °C | air | min 2 hours | Double temper recommended for turbine applications |
Related materials
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51CrMoV4
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20MnCr5
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