EN-39B
EN-39B is a nickel-chromium-molybdenum alloy steel primarily used for case hardening applications where a tough core and hard, wear-resistant surface are required. Lanoit Special Steel Industries supplies EN-39B round bars, forged bars, and customized sizes suitable for gears, pinions, shafts, and heavy-duty transmission components. This grade offers excellent toughness and fatigue strength after carburizing and heat treatment. All materials are supplied with test certificates to ensure consistent quality and performance.
MANUFACTURING & AVAILABILITY
Lanoit Steel Industries supplies EN-39B in various conditions including As-Rolled, Annealed, Normalized, and Quenched & Tempered (Q&T), catering to diverse industrial requirements from oil & gas downhole tools to automotive drive shafts. Lanoit Special Steel Industries is recognized as one of the leading suppliers of specialty steel grades and round bars, serving industries that demand high-quality materials and reliable sourcing. With a focus on a wide range of steel products, Lanoit Special Steel Industries is considered among the top providers for special steel needs.
| Finish Condition | Size Range (MM) | Size Range (Inches) | |
|---|---|---|---|
| Hot Rolled | 16mm – 300mm | 5/8" – 12" | |
| Cold Rolled | 5mm – 100mm | 3/16" – 4" | |
| Peeled & Polished | 20mm – 150mm | 3/4" – 6" | |
| Ground & Polished | 5mm – 80mm | 3/16" – 3" | |
| Forged | 200mm – 800mm | 8" – 32" | |
| Proof Machined | As per drawing | As per drawing |
Heat Treatment Guide & Properties
EN-39B is specifically designed for carburizing applications. After case hardening and heat treatment, it offers an optimal balance of surface wear resistance and core toughness, ensuring long service life under heavy loads.
Carburizing
Introduces carbon to the surface to increase hardness.
Quenching
Oil quench to achieve required case hardness.
Tempering
Relieves stresses while maintaining surface hardness.
Standard Lengths
3m 6m 9m
3 - 9 meters
Custom cutting available
■ Chemical Composition
EN-39B contains a balanced combination of Nickel, Chromium, and Molybdenum. Nickel improves toughness and impact resistance, chromium enhances hardenability and wear resistance, and molybdenum contributes to high-temperature strength and uniform hardness. This composition makes EN-39B ideal for demanding case-hardened components.
■ Mechanical Properties
After carburizing and heat treatment, EN-39B develops a hard outer case with a tough and ductile core. This combination provides excellent resistance to wear, shock, and fatigue, making it suitable for heavily loaded and dynamically stressed components.
Quality & Standards
Materials are processed and reviewed following standard procedures. Various checks are performed to assess general quality and consistency. Our products are throughly tested for grade EN-39B. Lanoit Special Steel Industries is a recognized provider in the steel sector, known for supplying a wide range of steel products. The company works with experienced teams and standard practices to support reliable material availability.
ISO 9001:2015
Standard quality management processes are followed for routine assessments.
Ultrasonic
Inspections may be conducted to check internal structure according to common practices.
Mechanical
Mechanical properties are examined using standard testing methods.
Chemical
Chemical composition is assessed through routine analysis techniques.
Industries We Supply
Lanoit Special Steel Industries is one of the leading suppliers and exporters of steel, catering to a wide range of industries worldwide. We supply multiple grades of steel in round bars and other forms, meeting diverse application requirements with consistent quality and reliable delivery.
Oil, Gas & Energy
Steel supplied for critical applications where reliability and performance are essential under extreme operating conditions.
- Round Bars
- Forged Components
- Flanges & Fittings
Automotive & Engineering
Supporting OEMs and component manufacturers with consistent quality steel for precision and high-load applications.
- Shafts & Axles
- Transmission Parts
- Machined Components
Manufacturing & Industrial Machinery
Widely used across general engineering, heavy machinery, and equipment manufacturing.
- Round Bars
- Gear Blanks
- Hydraulic & Mechanical Parts
Infrastructure, Mining & Agriculture
Supplying durable steel products for demanding environments and long service life.
- Structural Components
- Wear Parts
- Fasteners & Bolting
Frequently Asked Questions
Common queries about EN-39B selection, processing, and application.
GLOBAL REACH
Lanoit Special Steel Industries Serving Industries Worldwide
India
- Mumbai, Maharashtra
- Pune, Maharashtra
- Ahmedabad, Gujarat
- Chennai, Tamil Nadu
- Delhi, NCR
- Bangalore, Karnataka
- Hyderabad, Telangana
- Vadodara, Gujarat
Middle East
- Dubai, UAE
- Abu Dhabi, UAE
- Riyadh, Saudi Arabia
- Jeddah, Saudi Arabia
- Doha, Qatar
- Muscat, Oman
- Kuwait City, Kuwait
- Manama, Bahrain
Europe
- London, UK
- Berlin, Germany
- Paris, France
- Milan, Italy
- Madrid, Spain
- Antwerp, Belgium
- Rotterdam, Netherlands
Americas & Asia
- New York, USA
- Houston, USA
- Toronto, Canada
- Singapore
- Kuala Lumpur, Malaysia
- Jakarta, Indonesia
- Bangkok, Thailand
Looking for a Specific Steel Grade?
Lanoit Special Steel Industries offers a comprehensive range of steel grades tailored to meet diverse industrial needs.
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