FOR REQUIREMENT OF THIS GRADE OR FOR DETAIL CONTACT US AT :-
LADHANI METAL CORPORATION, MUMBAI, INDIA
Introduction
EN 10084 round bars are case hardening steels manufactured according to the European standard EN 10084, which specifies technical delivery conditions for steels intended for carburizing and surface hardening applications. These steels are widely used for components that require a combination of high surface hardness, excellent wear resistance, and a tough, shock-resistant core.
EN 10084 round bars are especially suitable for automotive gears, shafts, pinions, camshafts, and transmission components where surface durability and fatigue strength are critical. The controlled chemical composition ensures excellent hardenability, machinability, and consistent case depth after carburizing treatment.
Applicable Standard and Scope
EN 10084 specifies:
Chemical composition limits for case hardening steels
Hardenability requirements for selected grades
Technical delivery conditions
Testing and inspection procedures
Surface quality and dimensional tolerances
The standard applies primarily to hot-rolled round bars, forged bars, and wire rods intended for case hardening processes such as carburizing or carbonitriding.
Materials are generally supplied with inspection certificates according to EN 10204 (3.1 or 3.2 upon request).
Purpose of EN 10084 Case Hardening Steels
Unlike through-hardened steels, EN 10084 steels are designed to:
Develop a very hard outer layer (case) after carburizing
Maintain a tough and ductile inner core
Provide excellent resistance to wear and surface fatigue
Withstand shock loading and cyclic stresses
This makes EN 10084 round bars ideal for power transmission and heavily loaded rotating components.
Grades of EN 10084 Round Bars
Typical grades covered under EN 10084 include:
C10E, C10R, C15E, C15R, C16E, C16R, 17Cr3, 17CrS3, 28Cr4, 28CrS4, 16MnCr5,
16MnCrS5, 16MnCrB5, 20MnCr5, 20MnCrS5, 18CrMo4, 18CrMoS4, 22CrMoS3-5, 20MoCr3,
20MoCrS3, 20MoCr4, 20MoCrS4, 16NiCr4, 16NiCrS4, 10NiCr5-4, 18NiCr5-4,
17CrNi6-6, 15NiCr13, 20NiCrMo2-2, 20NiCrMoS2-2, 17NiCrMo6-4, 17NiCrMoS6-4, 20NiCrMoS6-4,
18CrNiMo7-6, 14NiCrMo13-4, 20NiCrMo13-4.
Each grade is selected based on required core strength, hardenability, and
case depth.
|
Chemical Composition Table (%) |
|||||||||
|
Grade |
C |
Si |
Mn |
P |
S |
Cr |
Mo |
Ni |
B |
|
C10E |
0.07–0.13 |
≤0.40 |
0.30–0.60 |
≤0.025 |
≤0.035 |
— |
— |
— |
— |
|
C10R |
0.07–0.13 |
≤0.40 |
0.30–0.60 |
≤0.045 |
≤0.045 |
— |
— |
— |
— |
|
C15E |
0.12–0.18 |
≤0.40 |
0.30–0.60 |
≤0.025 |
≤0.035 |
— |
— |
— |
— |
|
C15R |
0.12–0.18 |
≤0.40 |
0.30–0.60 |
≤0.045 |
≤0.045 |
— |
— |
— |
— |
|
C16E |
0.13–0.19 |
≤0.40 |
0.30–0.60 |
≤0.025 |
≤0.035 |
— |
— |
— |
— |
|
C16R |
0.13–0.19 |
≤0.40 |
0.30–0.60 |
≤0.045 |
≤0.045 |
— |
— |
— |
— |
|
17Cr3 |
0.14–0.19 |
≤0.40 |
0.50–0.80 |
≤0.035 |
≤0.035 |
0.70–1.00 |
— |
— |
— |
|
17CrS3 |
0.14–0.19 |
≤0.40 |
0.50–0.80 |
≤0.035 |
0.020–0.040 |
0.70–1.00 |
— |
— |
— |
|
28Cr4 |
0.25–0.32 |
≤0.40 |
0.50–0.80 |
≤0.035 |
≤0.035 |
0.90–1.20 |
— |
— |
— |
|
28CrS4 |
0.25–0.32 |
≤0.40 |
0.50–0.80 |
≤0.035 |
0.020–0.040 |
0.90–1.20 |
— |
— |
— |
|
16MnCr5 |
0.14–0.19 |
≤0.40 |
1.00–1.30 |
≤0.025 |
≤0.035 |
0.80–1.10 |
— |
— |
— |
|
16MnCrS5 |
0.14–0.19 |
≤0.40 |
1.00–1.30 |
≤0.025 |
0.020–0.040 |
0.80–1.10 |
— |
— |
— |
|
16MnCrB5 |
0.14–0.19 |
≤0.40 |
1.00–1.30 |
≤0.025 |
≤0.035 |
0.80–1.10 |
— |
— |
0.0008–0.005 |
|
20MnCr5 |
0.17–0.22 |
≤0.40 |
1.10–1.40 |
≤0.025 |
≤0.035 |
1.00–1.30 |
— |
— |
— |
|
20MnCrS5 |
0.17–0.22 |
≤0.40 |
1.10–1.40 |
≤0.025 |
0.020–0.040 |
1.00–1.30 |
— |
— |
— |
|
18CrMo4 |
0.15–0.21 |
≤0.40 |
0.60–0.90 |
≤0.035 |
≤0.035 |
0.90–1.20 |
0.15–0.30 |
— |
— |
|
18CrMoS4 |
0.15–0.21 |
≤0.40 |
0.60–0.90 |
≤0.035 |
0.020–0.040 |
0.90–1.20 |
0.15–0.30 |
— |
— |
|
22CrMoS3-5 |
0.19–0.24 |
≤0.40 |
0.60–0.90 |
≤0.035 |
0.020–0.040 |
0.90–1.20 |
0.15–0.30 |
— |
— |
|
20MoCr3 |
0.17–0.23 |
≤0.40 |
0.50–0.80 |
≤0.035 |
≤0.035 |
0.40–0.70 |
0.15–0.30 |
— |
— |
|
20MoCrS3 |
0.17–0.23 |
≤0.40 |
0.50–0.80 |
≤0.035 |
0.020–0.040 |
0.40–0.70 |
0.15–0.30 |
— |
— |
|
20MoCr4 |
0.17–0.23 |
≤0.40 |
0.50–0.80 |
≤0.035 |
≤0.035 |
0.90–1.20 |
0.15–0.30 |
— |
— |
|
20MoCrS4 |
0.17–0.23 |
≤0.40 |
0.50–0.80 |
≤0.035 |
0.020–0.040 |
0.90–1.20 |
0.15–0.30 |
— |
— |
|
16NiCr4 |
0.13–0.19 |
≤0.40 |
0.50–0.80 |
≤0.035 |
≤0.035 |
0.70–1.00 |
— |
0.90–1.20 |
— |
|
16NiCrS4 |
0.13–0.19 |
≤0.40 |
0.50–0.80 |
≤0.035 |
0.020–0.040 |
0.70–1.00 |
— |
0.90–1.20 |
— |
|
10NiCr5-4 |
0.07–0.13 |
≤0.40 |
0.50–0.80 |
≤0.035 |
≤0.035 |
0.90–1.20 |
— |
1.00–1.30 |
— |
|
18NiCr5-4 |
0.15–0.21 |
≤0.40 |
0.50–0.80 |
≤0.035 |
≤0.035 |
0.90–1.20 |
— |
1.00–1.30 |
— |
|
17CrNi6-6 |
0.14–0.19 |
≤0.40 |
0.50–0.80 |
≤0.035 |
≤0.035 |
1.40–1.70 |
— |
1.40–1.70 |
— |
|
15NiCr13 |
0.12–0.18 |
≤0.40 |
0.30–0.60 |
≤0.035 |
≤0.035 |
0.60–0.90 |
— |
3.00–3.50 |
— |
|
20NiCrMo2-2 |
0.17–0.23 |
≤0.40 |
0.40–0.70 |
≤0.035 |
≤0.035 |
0.40–0.70 |
0.15–0.30 |
0.40–0.70 |
— |
|
20NiCrMoS2-2 |
0.17–0.23 |
≤0.40 |
0.40–0.70 |
≤0.035 |
0.020–0.040 |
0.40–0.70 |
0.15–0.30 |
0.40–0.70 |
— |
|
17NiCrMo6-4 |
0.14–0.19 |
≤0.40 |
0.50–0.80 |
≤0.035 |
≤0.035 |
1.30–1.70 |
0.25–0.35 |
1.40–1.70 |
— |
|
17NiCrMoS6-4 |
0.14–0.19 |
≤0.40 |
0.50–0.80 |
≤0.035 |
0.020–0.040 |
1.30–1.70 |
0.25–0.35 |
1.40–1.70 |
— |
|
20NiCrMoS6-4 |
0.17–0.23 |
≤0.40 |
0.50–0.80 |
≤0.035 |
0.020–0.040 |
1.30–1.70 |
0.25–0.35 |
1.40–1.70 |
— |
|
18CrNiMo7-6 |
0.15–0.21 |
≤0.40 |
0.50–0.90 |
≤0.025 |
≤0.035 |
1.50–1.80 |
0.25–0.35 |
1.40–1.70 |
— |
|
14NiCrMo13-4 |
0.11–0.16 |
≤0.40 |
0.30–0.60 |
≤0.035 |
≤0.035 |
0.60–0.90 |
0.30–0.50 |
3.00–3.50 |
— |
|
20NiCrMo13-4 |
0.17–0.23 |
≤0.40 |
0.30–0.60 |
≤0.035 |
≤0.035 |
0.60–0.90 |
0.30–0.50 |
3.00–3.50 |
— |
These alloying elements ensure proper hardenability and uniform case formation during heat treatment.
Mechanical Properties
Mechanical properties are typically specified in the reference condition (untreated or normalized). After carburizing and heat treatment, properties depend on case depth and tempering.
Typical core properties after heat treatment:
Tensile strength: 800–1200 MPa (depending on grade)
Yield strength: 600–900 MPa
Elongation: 10–16%
Surface hardness after carburizing: 58–62 HRC (approx.)
High alloy grades such as 18CrNiMo7-6 offer superior fatigue strength and deep hardening capability for large gears and heavy-duty shafts.
Heat Treatment Process
EN 10084 round bars are designed for:
Carburizing at 900–950°C
Quenching (oil or gas quench)
Tempering at controlled temperature
This process produces:
Hard wear-resistant surface
Tough, impact-resistant core
Improved fatigue life
Excellent contact strength
Some grades are also suitable for carbonitriding depending on application requirements.
Form of Supply
EN 10084 round bars are supplied in:
Hot rolled round bars
Forged round bars
Peeled round bars
Turned and polished bars
Ground finish bars
Standard supply condition:
Untreated
Normalized
Soft annealed (upon request)
Available diameters typically range from small precision sizes to large forged sections depending on grade and production capability.
Key Features
Excellent surface hardening capability
High wear resistance after carburizing
Strong and tough core structure
Good machinability in untreated condition
Consistent case depth control
Suitable for heavy dynamic loading
Superior fatigue and contact strength
Good dimensional stability after heat treatment
Applications
EN 10084 round bars are extensively used in:
Automotive gears and gear shafts
Transmission components
Differential gears
Camshafts
Crankshafts
Pinions and sprockets
Heavy-duty machine shafts
Industrial gearboxes
Bearings and rolling components
Mining and construction equipment parts
High alloy grades such as 18CrNiMo7-6 are commonly used for large industrial gears and wind turbine gear systems due to their excellent fatigue performance.
Conclusion
EN 10084 round bars are premium case hardening steels designed for components requiring exceptional surface hardness combined with core toughness. With a wide range of grades available, these steels offer reliable performance in automotive, power transmission, and heavy engineering applications. Their excellent hardenability, fatigue resistance, and wear properties make them a preferred choice for critical mechanical parts operating under demanding service conditions.
For stock availability, customized sizes, or technical specifications, contact Ladhani Metal Corporation.
FOR REQUIREMENT OF THIS GRADE OR FOR DETAIL CONTACT US AT :-
Product Link:
https://www.indiamart.com/proddetail/en-10084-20mocr4-round-bars-2858847322973.html?sellerpreview=1
https://www.indiamart.com/proddetail/en-10084-20mocrs3-round-bars-2858847168755.html?sellerpreview=1
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https://www.indiamart.com/proddetail/en-10084-22crmos3-5-round-bars-2858830152455.html?sellerpreview=1
https://www.ladhanimetal.in/products/en-10084-10nicr5-4-round-bars/3454
https://www.ladhanimetal.in/products/en-10084-20mncrs5-round-bars/3444
https://www.ladhanimetal.in/products/en-10084-20mncrs5-round-bars/3444
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