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45CrNiMo1V is a high-performance alloy structural steel designed for critical rotating components and high-load mechanical systems. The addition of nickel (Ni), chromium (Cr), molybdenum (Mo), and vanadium (V) provides an excellent balance of:
High tensile strength
Superior toughness
Outstanding fatigue resistance
Resistance to temper embrittlement
Compared with conventional grades such as 42CrMo or 40Cr, 45CrNiMo1V offers:
Better performance in large forgings and thick sections
Higher fatigue life under cyclic stress
Improved reliability in high-temperature and high-load environments
It is widely used in power generation, heavy equipment, and critical transmission systems.
Chemical Composition (wt%)
| Element | Content (%) |
|---|---|
| C | 0.42 – 0.50 |
| Si | 0.17 – 0.37 |
| Mn | 0.50 – 0.80 |
| Cr | 0.90 – 1.20 |
| Ni | 1.30 – 1.80 |
| Mo | 0.30 – 0.50 |
| V | 0.05 – 0.15 |
| P | ≤ 0.025 |
| S | ≤ 0.025 |
Specifications & Dimensions
| Product Type | Size Range | Length | Standard |
|---|---|---|---|
| Round Bar | 20 – 600 mm (0.79" – 23.6") | 3 – 12 m | GB / ASTM |
| Forged Bar | 100 – 1500 mm (3.9" – 59") | Custom | GB |
| Steel Plate | 10 – 250 mm (0.39" – 9.84") | Custom | GB |
| Rotor Forgings | Custom | As per drawing | ASTM / EN |
Tolerance: ASTM A29 / EN 10060
Surface Condition: Black / Peeled / Turned / Polished
Mechanical Properties (Typical, Q&T Condition)
| Property | Value |
|---|---|
| Tensile Strength | ≥ 1100 MPa |
| Yield Strength | ≥ 900 MPa |
| Elongation | ≥ 10% |
| Impact Energy | ≥ 60 J |
| Hardness | 32 – 42 HRC |
Heat Treatment Process
Austenitizing: 850 – 880°C
Quenching: Oil quenching
Tempering: 200 – 650°C
Heat Treatment Advantages:
Uniform mechanical properties in large sections
Reduced residual stress
Improved fatigue resistance
Enhanced structural stability
Key Features & Advantages
1. High Strength & Load Capacity
Suitable for heavy-duty shafts, rotors, and high-stress components.
2. Excellent Toughness
Nickel improves impact resistance and crack resistance, even at low temperatures.
3. Superior Fatigue Resistance
Ideal for rotating equipment and cyclic loading conditions.
4. Good Hardenability
Ensures consistent performance in large forgings and thick cross-sections.
5. Resistance to Temper Embrittlement
Mo and V improve long-term stability in high-temperature applications.
Applications
45CrNiMo1V alloy steel is widely used in:
Steam turbine rotors
Generator shafts
Heavy-duty gear shafts
Oil & gas drilling equipment
Metallurgical machinery
Large industrial forgings
Comparison with Similar Grades
| Grade | Strength | Toughness | Application |
|---|---|---|---|
| 45CrNiMo1V | ⭐⭐⭐⭐⭐ | ⭐⭐⭐⭐⭐ | Rotors / Power Equipment |
| 45CrNiMo | ⭐⭐⭐⭐ | ⭐⭐⭐⭐ | General Heavy Duty |
| 42CrMo | ⭐⭐⭐ | ⭐⭐⭐ | General Machinery |
Inspection & Quality Assurance
We implement strict inspection standards:
Chemical composition verification
Mechanical property testing
Ultrasonic Testing (UT) for internal defects
Magnetic Particle Testing (MT)
Metallographic analysis
✅ Third-party inspection: SGS / BV / TUV
✅ Certification: EN 10204 3.1 / 3.2
Product Delivery Standards
Delivery Condition: Q&T / Annealed / Normalized
Packaging: Export-grade seaworthy packing
Delivery Time: 10–30 days
Custom forging & machining services available
Why Choose Our 45CrNiMo1V Steel?
Advanced refining technology for clean steel
Large forging capability for heavy components
Stable and consistent mechanical performance
Global export experience
Engineering and technical support
FAQ – Frequently Asked Questions
Q1: What is 45CrNiMo1V steel used for?
It is mainly used for rotors, shafts, and high-load rotating components in power and heavy industries.
Q2: What is the advantage of vanadium (V)?
Vanadium refines grain structure, improving strength, toughness, and fatigue resistance.
Q3: Is it suitable for turbine applications?
Yes, it is widely used in steam turbine rotors and generator shafts.
Q4: What heat treatment is recommended?
Quenching and tempering (Q&T) is the standard process.
Q5: Can you supply large forgings?
Yes, we provide custom large rotor and shaft forgings.
Contact Us
Looking for a reliable 45CrNiMo1V alloy steel supplier?
We provide:
Custom sizes & heavy forgings
Fast delivery
Competitive pricing
+8615769214734
office@dongmjd.com
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