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34CrNiMo6 / Alloy Steel 34CrNiMo6 Bars/ 34CrNiMo6 Rods / 34CrNiMo6 Rings
300.0 INR/Kilograms
Product Details:
- Length 3000 mm to 6000 mm (Custom Cut Length Available)
- Specific Use High Strength and Toughness Applications
- Technique Hot Rolled / Forged
- Application Heavy-duty Automotive Parts, Machine Parts, Shafts, Gears, Engineering Components
- Material 34CrNiMo6 / Alloy Steel
- Grade 34CrNiMo6
- Diameter 20 mm to 600 mm
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34CrNiMo6 / Alloy Steel 34CrNiMo6 Bars/ 34CrNiMo6 Rods / 34CrNiMo6 Rings Price And Quantity
- 300.0 INR/Kilograms
- 1000 Kilograms
34CrNiMo6 / Alloy Steel 34CrNiMo6 Bars/ 34CrNiMo6 Rods / 34CrNiMo6 Rings Product Specifications
- Heavy-duty Automotive Parts, Machine Parts, Shafts, Gears, Engineering Components
- High Strength and Toughness Applications
- 3000 mm to 6000 mm (Custom Cut Length Available)
- Hot Rolled / Forged
- Annealed / Quenched and Tempered
- Bars, Rods, Rings
- h9, h11, K10 or as per Requirement
- Black, Peeled, Turned, Polished
- 20 mm to 600 mm
- DIN EN 10083-3, ASTM A29, ISO 683-2
- 34CrNiMo6
- 34CrNiMo6 / Alloy Steel
- Min 850 MPa (Quenched & Tempered)
- Normalizing, Quenching & Tempering, Annealing
- Free from Cracks, Laps, and Surface Defects
- Min 1100 - 1300 MPa
- Good Machinability under Recommended Conditions
- Guaranteed Min 35 J (Charpy V-Notch at -40C)
- 100% UT passed as per EN10228-3
- 248-302 HB (Quenched & Tempered)
- Round, Square, Flat, Customized Rings
- Hot Rolled, Forged, or Peeled
- Min 13% (Quenched & Tempered)
Product Description
34CrNiMo6 (Material Number 1.6582) is arguably the most popular high-performance engineering steel in Europe. Often referred to as the DIN equivalent to AISI 4340 or BS EN24, it is a "workhorse" alloy known for its exceptional balance of strength, ductility, and hardenability.
1. Technical Profile
34CrNiMo6 is a through-hardening alloy steel. Unlike case-hardening steels (like 17CrNi6-6), it is designed to achieve uniform high strength throughout its entire cross-section via quenching and tempering.
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Deep Hardenability: The combination of Chromium, Nickel, and Molybdenum allows it to maintain high mechanical properties even in diameters up to 300mm.
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High Fatigue Resistance: Its chemical purity and structure make it highly resistant to repeated stress cycles.
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Toughness: It remains ductile even at relatively high hardness levels.
2. Chemical Composition (EN 10083-3)
The presence of Nickel is the key differentiator here, providing toughness that standard Chrome-Moly steels lack.
| Element | Percentage (%) |
| Carbon (C) | 0.30 0.38 |
| Chromium (Cr) | 1.30 1.70 |
| Nickel (Ni) | 1.30 1.70 |
| Molybdenum (Mo) | 0.15 0.30 |
| Manganese (Mn) | 0.50 0.80 |
| Silicon (Si) | max 0.40 |
3. Mechanical Properties (Condition: QT)
When supplied in the Quenched and Tempered (QT) condition, the properties are dependent on the section thickness (the "mass effect").
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Tensile Strength ($R_m$):$1000 1200 text{ MPa}$
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Yield Strength ($R_{e}$):$800 text{ MPa}$ (Minimum)
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Elongation ($A$):$11% 13%$
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Impact Energy ($KV$):$35 45 text{ J}$ (at room temperature)
4. Available Forms & Applications
Because it is so reliable, 34CrNiMo6 is manufactured in a wide variety of shapes for the heavy-duty sector:
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Round Bars & Rods: Typically used for transmission shafts, axle spindles, and high-tensile bolts.
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Forged Rings: Essential for wind turbine gearboxes, aerospace bearings, and heavy-duty flange assemblies.
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Blocks/Flats: Used for high-stress machinery frames and specialized tooling.
Key Industries:
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Wind Energy: Main shafts and gear components for turbines.
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Automotive: Heavy-duty crankshafts, connecting rods, and steering knuckles.
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Oil & Gas: High-strength drill collars and valve components.
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Aerospace: Structural airframe parts and propeller hubs.
5. Machining and Heat Treatment
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Machinability: In the QT condition, it is considered "fair" but can be tough on tools. Using carbide-tipped tools and appropriate cooling is recommended.
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Forging: Should be performed between $850circtext{C}$ and $1100circtext{C}$.
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Hardening: Heat to $820circtext{C} 850circtext{C}$ and quench in oil.
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Tempering: Generally done between $540circtext{C} 680circtext{C}$ to adjust the final hardness/toughness ratio.
Comparison: 34CrNiMo6 vs. AISI 4340
While they are very similar, there are slight differences in the "tolerance" of alloying elements:
| Feature | AISI 4340 | 34CrNiMo6 |
| Nickel Range | 1.65 2.00% | 1.30 1.70% |
| Chromium Range | 0.70 0.90% | 1.30 1.70% |
| Standard | ASTM / AISI |
Versatile Forms and Exceptional Strength
Our 34CrNiMo6 alloy steel bars, rods, and rings come in a variety of shapes including round, square, flat, and custom rings, with diameters ranging from 20 mm to 600 mm. These products are engineered to meet demanding mechanical properties, including high yield and tensile strength, making them ideal for heavy-duty applications such as gears, shafts, and structural machinery.
Advanced Processing & Surface Quality
Each product undergoes meticulous processing-hot rolled, forged, or peeled-to meet precise dimensional tolerances like h9, h11, and K10. Our bars and rods are finished to achieve black, peeled, turned, or polished surfaces. Ultrasonic testing is carried out to ensure 100% defect-free material as per EN10228-3, and surface conditions are guaranteed free from cracks and laps for optimal reliability.
Reliable Performance Across Industries
Whether in automotive, engineering, or machine components, our 34CrNiMo6 alloy steel delivers consistent performance under stress. With robust machinability, tailored lengths, and a range of heat treatments (normalizing, annealing, quenching, tempering), these products help maximize productivity and lifespan of critical components across a range of industries.
FAQ's of 34CrNiMo6 / Alloy Steel 34CrNiMo6 Bars/ 34CrNiMo6 Rods / 34CrNiMo6 Rings:
Q: How is 34CrNiMo6 steel processed to achieve its mechanical properties?
A: 34CrNiMo6 alloy steel bars, rods, and rings undergo heat treatments such as normalizing, quenching, and tempering to attain exceptional strength and toughness. These processes enhance the material's hardness (248-302 HB) and deliver reliable yield (min 850 MPa) and tensile strength (1100-1300 MPa), suitable for demanding engineering applications.Q: What are the common uses of 34CrNiMo6 bars, rods, and rings?
A: These products are widely employed in manufacturing heavy-duty automotive parts, machine shafts, gears, and various engineering components. Their high strength, toughness, and guaranteed impact value at -40C make them ideal for situations where reliability under extreme loads and temperatures is essential.Q: When should I choose customized rings or other shapes for my project?
A: Customized rings,-round, square, or flat shapes should be selected based on the specific mechanical and dimensional requirements of your application. The flexibility in shapes ensures optimal fit and function in bespoke machine designs or complex assemblies, maximizing operational efficiency.Q: Where are 34CrNiMo6 alloy steel components typically supplied from?
A: In India, 34CrNiMo6 bars, rods, and rings are manufactured, supplied, and exported by reputed dealers, fabricators, and producers. These products are distributed nationwide for automotive, engineering, and heavy machinery industries, ensuring compliance with international standards like DIN EN 10083-3 and ASTM A29.Q: What testing and quality assurance processes are employed for these steel products?
A: All bars, rods, and rings undergo 100% ultrasonic testing as per EN10228-3 to detect any internal defects. Additionally, strict surface inspections ensure the materials are free from cracks, laps, or surface flaws, guaranteeing reliability and safety during operation.Q: How does the machinability of 34CrNiMo6 benefit fabricators?
A: 34CrNiMo6 alloy steel exhibits good machinability when processed under recommended conditions. This property allows for efficient turning, drilling, and milling, helping manufacturers achieve precise dimensions and smooth finishes, which ultimately reduces fabrication time and costs.Tell us about your requirement
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