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25Cr2MoVA alloy steel is a high-strength chromium-molybdenum-vanadium (Cr-Mo-V) alloy steel engineered for extreme temperature, high pressure, and heavy load conditions. With higher carbon and alloy content compared to standard Cr-Mo steels, it delivers superior strength, creep resistance, and thermal stability, making it ideal for critical power plant and heavy industrial components.
This material is widely used in steam turbine rotors, high-pressure shafts, and large forged components, where safety, durability, and long service life are essential.
Technical Specifications
➤ Standard
GB/T Alloy Structural Steel
➤ Available Forms
Forged Rotors
Heavy Shafts
Round Bars
Custom Forgings / Machined Parts
Chemical Composition (Typical)
| Element | Content (%) |
|---|---|
| C | 0.22 – 0.29 |
| Cr | 2.0 – 2.5 |
| Mo | 0.9 – 1.2 |
| V | 0.15 – 0.30 |
| Si | ≤ 0.40 |
| Mn | ≤ 0.70 |
| Fe | Balance |
Key Features & Advantages
✅ Ultra High Strength
Higher carbon and alloy content → excellent load-bearing capacity
✅ Outstanding Creep Resistance
Designed for long-term high-temperature service
✅ Good Thermal Stability
Maintains structure under extreme thermal cycling
✅ Enhanced Hardenability
Suitable for large-section forgings
Comparison Guide – 25Cr2MoVA vs 21CrMoVA vs P91
| Property | 25Cr2MoVA | 21CrMoVA | P91 |
|---|---|---|---|
| Strength | ⭐⭐⭐⭐⭐ | ⭐⭐⭐⭐ | ⭐⭐⭐ |
| Creep Resistance | ⭐⭐⭐⭐⭐ | ⭐⭐⭐⭐ | ⭐⭐⭐⭐⭐ |
| Oxidation Resistance | ⭐⭐⭐⭐ | ⭐⭐⭐ | ⭐⭐⭐⭐⭐ |
| Weldability | ⭐⭐ | ⭐⭐⭐ | ⭐⭐⭐⭐ |
| Application | Heavy rotors | Shafts | Pipes |
👉 Key Insight:
25Cr2MoVA = highest strength for critical components
P91 = best for piping systems
21CrMoVA = balanced mechanical performance
Applications
⚡ Power Generation
Steam turbine rotors
High-pressure shafts
Generator components
🏭 Heavy Industry
Large forged parts
High-load transmission systems
Pressure-bearing structures
Inspection & Quality Assurance
Chemical Composition Analysis
Mechanical Property Testing
Ultrasonic Testing (UT)
Impact Testing
Hardness Testing
Metallographic Examination
Product Delivery Standards
Heavy-duty export packaging
Anti-corrosion protection
Heat number traceability
EN 10204 3.1 / 3.2 certification
FAQ
1. What is 25Cr2MoVA alloy steel used for?
It is used for critical high-strength components such as turbine rotors, heavy shafts, and large forgings.
2. What makes 25Cr2MoVA stronger than other alloy steels?
Its higher carbon, chromium, and molybdenum content provides enhanced strength and hardenability.
3. What is the temperature range of 25Cr2MoVA?
It typically performs well in high-temperature environments up to 550–600°C.
4. How does 25Cr2MoVA compare to P91?
25Cr2MoVA → higher strength
P91 → better oxidation resistance and weldability
5. Is 25Cr2MoVA suitable for welding?
Welding is possible but requires:
Preheating
Post-weld heat treatment (PWHT)
6. What role does molybdenum (Mo) play?
Molybdenum improves:
High-temperature strength
Creep resistance
Hardness
7. What industries use 25Cr2MoVA steel?
Power plants
Heavy machinery
Petrochemical industry
8. What forms are available?
Forged rotors
Bars
Heavy forgings
Custom-machined components
Contact Us
Looking for 25Cr2MoVA Alloy Steel Forgings, Rotors, or Bars?
We provide:
Factory-direct pricing
Custom heavy forging solutions
Fast delivery for global projects
Engineering support
👉 Contact us now for quotation, datasheet, and technical consultation.
+8615769214734
office@dongmjd.com
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