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Chrome Moly EN 34CrNiMo6 Alloy Steel Bars
185.0 INR/Kilograms
Product Details:
- Specific Use Shafts, Gears, Axles, Spindles, Pinions
- Material Chrome Moly EN 34CrNiMo6 Alloy Steel
- Type Alloy Steel Bars
- Grade 34CrNiMo6
- Technique Hot Rolled / Forged / Cold Drawn
- Processing Heat Treatment, Annealed, Quenched & Tempered
- Application Automobile Industries, Engineering, Construction, Oil & Gas, Power Plants
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Chrome Moly EN 34CrNiMo6 Alloy Steel Bars Price And Quantity
- 185.0 INR/Kilograms
- 1 Kilograms
Chrome Moly EN 34CrNiMo6 Alloy Steel Bars Product Specifications
- Hot Rolled / Forged / Cold Drawn
- Heat Treatment, Annealed, Quenched & Tempered
- Automobile Industries, Engineering, Construction, Oil & Gas, Power Plants
- Chrome Moly EN 34CrNiMo6 Alloy Steel
- Alloy Steel Bars
- 34CrNiMo6
- Shafts, Gears, Axles, Spindles, Pinions
- Bright, Black, Peeled, Polished, Turned
- EN 10083-3, DIN 17200, ASTM A29
- 16 mm - 350 mm
- H9, H10, H11, or as required
- 2 - 6 meters or custom cut length
- Min. 35 J (Charpy V-Notch at -20C)
- Min. 13% (in Q&T condition)
- Good for most industrial applications
- 241 - 302 HB (after heat treatment)
- Smooth & Scale Free
- As Rolled, Annealed, or Hardened & Tempered
- Round, Square, Flat Bars
- Min. 835 MPa (in quenched and tempered condition)
- Min. 1000 MPa
Product Description
EN 34CrNiMo6 (widely referenced under standard material number 1.6582) is a premier, high-tensile nickel-chromium-molybdenum alloy steel specified under the European standard EN 10083-3.
Often classified broadly under "chrome-moly" grades due to its Chromium and Molybdenum profile, it is more accurately defined as a high-hardenability triple-alloy (Ni-Cr-Mo) steel. The substantial inclusion of Nickel (around 1.50%) elevates this grade beyond standard chrome-moly bars like 4140, giving it exceptional core toughness and through-hardening performance across massive bar diameters.
Global Designation Equivalents
When switching between international technical standards and engineering prints, EN 34CrNiMo6 matches up with these major global designations:
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UK (British Standards): EN24 / 817M40
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USA (AISI/SAE): AISI 4340 / UNS G43400
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France (AFNOR): 35NCD6
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Japan (JIS): SNCM439
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China (GB): 40CrNiMoA
Chemical Composition (Typical %)
The synchronized combination of nickel, chromium, and molybdenum delivers uniform microstructure transformations during quenching while suppressing temper brittleness.
| Carbon (C) | Nickel (Ni) | Chromium (Cr) | Molybdenum (Mo) | Manganese (Mn) | Silicon (Si) |
| 0.30% 0.38% | 1.30% 1.70% | 1.30% 1.70% | 0.15% 0.30% | 0.50% 0.80% | 0.40% |
Mechanical Properties (Quenched & Tempered, +QT)
34CrNiMo6 bars are most frequently utilized in the pre-hardened, Quenched and Tempered (+QT) condition, creating a highly reliable tempered martensite structure. Depending on cross-sectional bar diameter, typical minimum metrics include:
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Ultimate Tensile Strength ($R_m$): 900 1200 MPa (N/mm)
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Yield Strength ($R_{e}$): 700 900 MPa
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Elongation ($A_5$): 10% 12%
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Impact Toughness (Charpy-V): 45 J
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Delivery Condition Hardness (Annealed): 248 HBW (Optimized for machining before final treatment)
Key Technical Attributes
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Complete Through-Hardening: While standard chrome-moly grades develop a soft core in large diameters, the nickel content in 34CrNiMo6 guarantees deep hardenability down to the center of large-diameter bars (up to 150mm+).
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High Fatigue & Torsional Strength: This structural profile makes it resilient against alternating dynamic stresses, cyclic load peaks, and severe torsional twisting.
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Surface Nitriding Compatibility: If your component needs extreme localized wear resistance, it responds beautifully to nitriding or induction treatments, generating a hard case over 5560 HRC while leaving the core flexible and shock-resistant.
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Fabrication Note: Due to its high alloy content, it features low weldability. Welding requires mandatory preheating ($200text{C} - 300text{C}$) and post-weld heat treatment (PWHT) to dodge martensitic cracking in the heat-affected zone.
Common Industrial Applications
You will find 34CrNiMo6 round bars specified across heavy engineering, automotive powertrains, and critical structural hardgoods:
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Heavy Drivetrains: Propeller shafts, heavy-duty crankshafts, high-torque industrial axles, and planetary gear sets.
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Aviation & Defense: High-stress structural landing gear linkages, torque shafts, and control arms.
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Fasteners & Clamping Hardware: Ultra-high-tensile studs, heavy double-bolted industrial clamping rods, and precision machine spindles.
Available Industrial Sourcing Options
If you are sourcing material for engineering prototypes or active manufacturing runs, several commercial bar configurations are available:
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34CrNiMo6 Alloy Steel: Precision round bar stock processed through heat treatment to ensure excellent performance and durability metrics across industrial setups.
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Alloy Steel Round Bar 34CrNiMo6 - Length 6m: Premium polished 6-meter manufacturing lengths, optimized with a smooth surface finish to aid automated lathe feeding and machining operations.
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34crnimo6 Round Bar, 6 meter: Standard industrial-grade round stock ready for sizing, cutting, and forging into high-stress automotive and machinery components.
Superior Mechanical Strength
EN 34CrNiMo6 alloy steel bars are valued for their robust mechanical properties, including high yield and tensile strength, making them ideal for heavy-duty applications. Their impressive impact resistance assures longevity and reliability, even at sub-zero temperatures.
Versatile Applications Across Industries
Engineered for use in the automotive, construction, engineering, oil & gas, and power plant industries, these alloy steel bars are highly versatile. Their use in critical components such as shafts, axles, and gears highlights their importance in industrial manufacturing.
Custom Processing and Finishes
Customers can select from a range of finishes-bright, black, peeled, polished, or turned-to suit specific requirements. These bars are available hot rolled, cold drawn, or forged, and can be delivered in lengths from 2 to 6 meters or custom cut to order, ensuring precise integration into any project.
FAQ's of Chrome Moly EN 34CrNiMo6 Alloy Steel Bars:
Q: How are Chrome Moly EN 34CrNiMo6 Alloy Steel Bars typically processed?
A: These alloy steel bars are manufactured using heat treatment processes such as annealing, quenching, and tempering. They may be produced by hot rolling, forging, or cold drawing, followed by a range of finishing processes to achieve smooth, scale-free surfaces tailored to your requirements.Q: What applications benefit most from EN 34CrNiMo6 Alloy Steel Bars?
A: These bars are particularly beneficial in industries requiring high strength and toughness, such as automotive, engineering, construction, oil & gas, and power plants. Common uses include shafts, gears, axles, spindles, and pinions, where durability and mechanical reliability are essential.Q: When should EN 34CrNiMo6 Alloy Steel Bars be chosen over standard carbon steel?
A: EN 34CrNiMo6 alloy steel bars should be selected when higher mechanical strength, better impact resistance (especially at low temperatures), and enhanced performance from alloying elements such as chromium and molybdenum are needed beyond the capabilities of carbon steel.Q: Where can you source EN 34CrNiMo6 Alloy Steel Bars in India?
A: These alloy steel bars are widely available in India through dealers, exporters, manufacturers, suppliers, and fabricators. Many reputed producers offer customizable solutions to meet specific needs, ensuring prompt availability for projects of all scales.Q: What are the benefits of using alloy steel bars with smooth, scale-free surfaces?
A: Smooth, scale-free surfaces minimize the risk of surface defects, improve fatigue strength, and provide an optimal base for further machining or coating. This enhances the component's longevity and reliability in demanding industrial environments.Q: How does the specified hardness and impact value translate to performance?
A: A hardness of 241-302 HB and a minimum Charpy V-Notch impact value of 35 J at -20C ensure the bars maintain structural integrity under heavy loads and resist brittle fracture, making them suitable for critical applications under fluctuating or low temperatures.Tell us about your requirement
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