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20Cr1Mo1VNbTiB alloy steel is a high-performance, Cr-Mo-V-Nb-Ti-B alloy steel engineered for extreme temperature, high-pressure, and heavy-load applications.
Niobium (Nb), Titanium (Ti), and Boron (B) enhance grain refinement, hardenability, and creep resistance.
Suitable for steam turbine rotors, high-pressure shafts, and critical load-bearing components in modern power plants and heavy industrial applications.
Provides high strength, thermal stability, and long-term service reliability under extreme operating conditions.
Technical Specifications
➤ Standard
GB/T Alloy Structural Steel
➤ Available Forms
Forged Rotors & Shafts
Round Bars
Heavy Forgings
Custom CNC Machined Components
Chemical Composition (Typical)
| Element | Content (%) |
|---|---|
| C | 0.18 – 0.24 |
| Cr | 0.90 – 1.20 |
| Mo | 0.25 – 0.40 |
| V | 0.15 – 0.25 |
| Nb | 0.02 – 0.05 |
| Ti | 0.02 – 0.05 |
| B | 0.001 – 0.003 |
| Si | ≤ 0.40 |
| Mn | ≤ 0.70 |
| Fe | Balance |
Key Features & Advantages
✅ Ultra High Strength & Fatigue Resistance
Designed for rotor shafts and heavy-duty pressure components
✅ Excellent Creep Resistance
Maintains structural integrity in long-term high-temperature service
✅ Grain Refinement & Thermal Stability
Nb, Ti, and B additions refine grains → improved toughness and hardness
✅ High Load-Bearing Capacity
Ideal for critical rotating machinery and pressure-bearing components
Comparison Guide – 20Cr1Mo1VNbTiB vs 20Cr1Mo1VTiB vs 21CrMoVA
| Property | 20Cr1Mo1VNbTiB | 20Cr1Mo1VTiB | 21CrMoVA |
|---|---|---|---|
| Alloy Type | Cr-Mo-V-Nb-Ti-B | Cr-Mo-V-Ti-B | Cr-Mo-V |
| Strength | Very High | High | High |
| Creep Resistance | Very High | High | High |
| Grain Refinement | ⭐⭐⭐⭐⭐ | ⭐⭐⭐⭐ | ⭐⭐⭐⭐ |
| Temperature Capability | 500–550°C | 500–550°C | 500–550°C |
| Application | Ultra-critical rotors/shafts | Rotors & Shafts | Rotors & Shafts |
👉 Key Insight:
Nb addition → further enhances creep resistance and grain stability
Best for high-performance rotors, shafts, and critical pressure components
Applications
⚡ Power Generation
Steam turbine rotors
High-pressure shafts
Generator rotors
🏭 Heavy Industry
Large forged shafts and rotors
Pressure-bearing machinery
Rotating equipment under high stress
Inspection & Quality Assurance
Chemical Composition Analysis (PMI)
Mechanical Property Testing
Ultrasonic Testing (UT)
Hardness Testing
Impact Testing (Charpy)
Metallographic Analysis
Product Delivery Standards
Heavy-duty export packaging
Anti-corrosion coating
Full traceability (heat number)
EN 10204 3.1 / 3.2 certification
FAQ
1. What is 20Cr1Mo1VNbTiB steel used for?
Used for critical high-strength components in power plants, including turbine rotors, high-pressure shafts, and heavy-duty forgings.
2. What is the difference between 20Cr1Mo1VNbTiB and 20Cr1Mo1VTiB?
Nb addition → improves grain refinement and creep resistance
Better high-temperature stability and long-term service performance
3. Is this steel suitable for turbine rotors?
Yes, it is widely used for high-performance rotors and critical shafts.
4. What is the typical temperature range?
Reliable performance in 500–550°C working environments.
5. What heat treatment is required?
Quenching
Tempering
Ensures optimal strength, toughness, and hardness.
6. What role do Nb, Ti, and B play?
Niobium (Nb) → enhances grain stability and creep resistance
Titanium (Ti) → refines grains and improves toughness
Boron (B) → increases hardenability
7. What forms are available?
Forged rotors
Bars
Heavy forgings
Custom CNC machined components
8. Which industries use this steel?
Power generation
Heavy machinery manufacturing
Petrochemical and chemical industry
Contact Us
Looking for 20Cr1Mo1VNbTiB Alloy Steel Forgings, Rotors, or Shafts?
We provide:
Factory-direct pricing
Custom heavy forging solutions
Fast global delivery
Technical support for turbine & power plant projects
👉 Contact us now for quotation, datasheet, and expert consultation.
+8615769214734
office@dongmjd.com
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