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W.Nr. 40NiCrMo6 Chrome Moly Alloy Steel Bars
80.0 INR/Kilograms
Product Details:
- Processing Heat Treated, Annealed, Quenched & Tempered
- Diameter 10 mm to 500 mm
- Finish Bright / Black / Peeled / Ground / Polished
- Standard DIN 1.6565 / EN 40NiCrMo6
- Technique Hot Rolled / Forged
- Type Alloy Steel Bar
- Grade 40NiCrMo6
- Click to view more
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W.Nr. 40NiCrMo6 Chrome Moly Alloy Steel Bars Price And Quantity
- 80.0 INR/Kilograms
- 1 Kilograms
W.Nr. 40NiCrMo6 Chrome Moly Alloy Steel Bars Product Specifications
- DIN 1.6565 / EN 40NiCrMo6
- Hot Rolled / Forged
- Bright / Black / Peeled / Ground / Polished
- W.Nr. 40NiCrMo6 Chrome Moly Alloy Steel
- As required / Custom lengths
- 10 mm to 500 mm
- Heat Treated, Annealed, Quenched & Tempered
- h9, h11, or as customer specification
- 40NiCrMo6
- Alloy Steel Bar
- Used in manufacture of high-load machine parts
- Engineering components, automotive parts, shafts, gears, high-stress applications
- Good after heat treatment / coating
- Wooden Box / Bundled and Wrapped
- Round Bar, Hex Bar, Square Bar, Flat Bar (as requested)
- Annealed, Pre-machined, or Ready to use
- Smooth, Defect Free
- Ready Stock / Made to Order
- Available, EN 10204 3.1 / 3.2
- Excellent after proper heat treatment
- 217-269 HB (as per heat treatment)
Product Description
W.Nr. 1.6565 (standardized across Europe as 40NiCrMo6 under EN 10083-3) is the exact Werkstoffnummer designation for the premium Nickel-Chromium-Molybdenum alloy steel we discussed.
When you order bar stock under the formal W.Nr. 40NiCrMo6 designation, you are sourcing a high-end, triple-alloy engineering steel designed for extreme stress. Because it contains significant amounts of Nickel, Chromium, and Molybdenum working together, it eliminates the "soft core" problem (slack quenching) that compromises large-diameter bars made from simpler chrome-moly grades like 42CrMo4 (1.7225).
1. Dimensional Hardenability (The True Value of 40NiCrMo6)
The biggest trap when buying alloy steel bars is assuming a material's strength properties apply uniformly to all sizes. Standard chrome-moly steels drop in core strength drastically as the bar diameter grows past 50 mm.
W.Nr. 40NiCrMo6 solves this. The addition of Carbon (C)
$0.36% - 0.44%$ Sets high base tensile properties and depth of response to tempering. Nickel (Ni) $1.40% - 2.00%$ Delivers massive deep-core through-hardening and exceptional low-temperature toughness. Chromium (Cr) $0.90% - 1.40%$ Increases surface wear resistance and uniform depth of hardening. Molybdenum (Mo) $0.15% - 0.30%$ Suppresses temper brittleness and maintains material strength under thermal loads. Manganese (Mn) $0.50% - 0.80%$ Assists deep through-hardening and acts as a vital deoxidizer during melting. Silicon (Si) $le$ $0.40%$ Increases yield point and elasticity.
3. Standard Delivery Conditions
When ordering W.Nr. 40NiCrMo6 bars, they are typically specified in one of two major supply conditions depending on your processing pipeline:
Soft Annealed (+A)
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Hardness: $le$ 260 HBW (Brinell)
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When to use: Choose this if you are performing heavy material removal, such as deep gundrilling, cutting internal splines, or machining complex gear teeth. It ensures maximum tool life and minimal residual internal stress before you send it to final heat treatment.
Quenched & Tempered (+QT)
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Hardness: Typically ranges between 280 and 340 HBW ($sim$ 29 to 36 HRC).
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When to use: Choose this if you want to machine your components directly to final dimensions and put them straight into service without risking the dimensional warping or scaling that can occur during post-machining heat treatment.
4. Key Cross-References for Global Procurement
If you are coordinating manufacturing across different international facilities, W.Nr. 40NiCrMo6 maps directly to these major global standards:
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USA: AISI 4340 / SAE 4340
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Japan: JIS SNCM439
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United Kingdom: BS 817M40 / EN24
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China: GB 40CrNiMoA
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Russia: GOST 40KhN2MA (402)
5. Critical Fabrication Guidelines
Welding & Thermal Processing Warning
Due to its high alloy content and carbon equivalent, W.Nr. 40NiCrMo6 is highly susceptible to cold cracking caused by hydrogen entrapment.
Welding: Structural welding should be avoided. If it is absolutely mandatory for a repair or build-up, you must preheat the bar to 250C300C, use strictly controlled low-hydrogen electrodes, and perform immediate Post-Weld Heat Treatment (PWHT) / stress relief.
Flame/Laser Cutting: If bars are thermally cut rather than sawed, the cut edges will instantly air-harden into brittle martensite. These edges must be ground down or locally annealed before any subsequent machining to protect your cutting tools.
Versatile Product Range
40NiCrMo6 Chrome Moly Alloy Steel Bars are available in a variety of shapes-round, hex, square, and flat-catering to diverse industrial and engineering applications. With options for bright, black, peeled, ground, and polished finishes, they offer adaptability and precision for manufacturing processes requiring both aesthetics and structural integrity.
Superior Mechanical Properties
These alloy steel bars attain a hardness range of 217-269 HB after heat treatment, providing excellent machinability and durability for high-stress parts. They are ideal for automotive components, machine shafts, gears, and other engineering projects demanding resilience and reliability under heavy loads.
Flexible Supply and Certification
Products can be delivered from ready stock or manufactured to order, ensuring prompt fulfillment of project-specific needs. Each batch comes with full test certification-EN 10204 3.1 or 3.2-guaranteeing material authenticity and traceability. Precise tolerances (h9/h11) and custom lengths further enhance usability.
FAQ's of W.Nr. 40NiCrMo6 Chrome Moly Alloy Steel Bars:
Q: How are W.Nr. 40NiCrMo6 Chrome Moly Alloy Steel Bars processed for delivery?
A: These steel bars are processed using heat treatment methods such as annealing, quenching, and tempering according to application requirements. They can be supplied in annealed, pre-machined, or fully finished, ready-to-use conditions, ensuring they match the customer's specifications and intended application.Q: What benefits does using 40NiCrMo6 Chrome Moly Alloy Steel Bars provide in engineering applications?
A: This steel grade offers superior strength, excellent machinability after heat treatment, and reliable hardness. These features make it ideal for manufacturing shafts, gears, and other high-load machine parts, ensuring enhanced durability and performance in demanding environments.Q: When should I choose a specific surface finish for these alloy steel bars?
A: The choice of surface finish-bright, black, peeled, ground, or polished-depends on your application's aesthetic and functional requirements. For example, a ground or polished finish enhances dimensional accuracy and surface smoothness, which is crucial for precision-engineered components.Q: Where can these bars be sourced, and what delivery options are available?
A: W.Nr. 40NiCrMo6 Bars can be sourced across India from dealers, exporters, fabricators, manufacturers, and suppliers. They are available in ready stock for quick delivery or can be produced to order, with packing options like wooden boxes or bundled and wrapped for safe transportation.Q: What certification is provided with these steel bars?
A: Each shipment includes a test certificate in compliance with EN 10204 3.1 or 3.2, confirming the material's chemical and mechanical properties and ensuring it meets industry standards for quality and traceability.Q: How does heat treatment affect the corrosion resistance and machinability of the bars?
A: Heat treatment enhances both corrosion resistance and machinability. After appropriate heat treatment or surface coating, the bars exhibit improved resistance to corrosion and can be efficiently machined into complex shapes with tight tolerances.Tell us about your requirement
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