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Introduction
EN 10083-2 is a European standard that specifies the technical delivery conditions for non-alloy and alloy special steels intended for quenching and tempering or normalizing. This standard primarily covers medium carbon steels that are widely used in mechanical engineering, automotive, industrial machinery, and heavy-duty engineering applications where high strength, good toughness, and wear resistance are required.
Steels covered under EN 10083-2 are designed to achieve specific mechanical properties through heat treatment such as quenching and tempering. The controlled chemical composition ensures predictable hardenability, uniform strength, and consistent performance across different cross-sections. These steels offer an excellent balance between strength, ductility, machinability, and cost-effectiveness.
EN 10083-2 steels are commonly used for components subjected to dynamic loads, torsion, bending, and surface wear. Typical service conditions include rotating parts, load-bearing mechanical components, and parts requiring improved fatigue resistance. Due to their versatility and wide grade range, EN 10083-2 steels are among the most widely used engineering steels across Europe and global markets.
Applicable Standards and Specifications
EN 10083-2: Technical delivery conditions for steels for quenching and tempering – Part 2: Non-alloy steels
This standard is part of the EN 10083 series, which is divided as follows:
EN 10083-1: General technical delivery conditions
EN 10083-2: Non-alloy steels for quenching and tempering
EN 10083-3: Alloy steels for quenching and tempering
EN 10083-2 specifies requirements related to chemical composition, mechanical properties, heat treatment conditions, testing methods, and dimensional tolerances. The standard ensures compatibility with European mechanical design codes and manufacturing practices.
EN 10083-2 steels are often used as equivalents or alternatives to international grades such as AISI 1045, C45, and similar medium carbon steels, depending on application and heat treatment condition.
Form of Supply
EN 10083-2 steels are supplied in a wide range of semi-finished and finished forms to suit different manufacturing and fabrication requirements. Common forms of supply include:
Round bars
Square bars
Flat bars
Hexagonal bars
Forged bars and billets
The material can be supplied in the following delivery conditions:
As-rolled (+AR), suitable for further processing or heat treatment
Normalized (+N), offering improved machinability and uniform structure
Quenched and tempered (+QT), providing high strength and hardness
Surface conditions may include black, peeled, ground, turned, or polished finishes depending on customer requirements. Cut-to-length, straightened, and centerless ground bars are also available for precision engineering applications.
Available
Grades of EN 10083-2 Alloy Steel
EN 10083-2
covers a wide range of medium carbon alloy steels classified by tensile
strength and carbon content. Common grades include:
C15E, C15N,
C22E, C22N, C35E, C35N, C40E, C40N, C45E, C45N, C50E, C50N, C55E, C55N, C60E,
C60N
The “E”
suffix indicates steels intended for quenching and tempering, while “N”
indicates normalized condition.
Chemical Composition of EN 10083-2 Alloy Steel (%)
Steel Grades and Chemical Composition
(Cast Analysis)
|
Designation |
|
C (%) |
Mn (%) |
P (%) |
S (%) |
Cr (%) |
Mo (%) |
Cr+Mo+Ni (%) |
||||
|
|
||||||||||||
|
C35 |
|
0.32–0.39 |
0.40 |
|
0.50–0.80 |
0.045 max |
0.40 |
0.10 |
0.63 |
|||
|
C40 |
|
0.37–0.44 |
0.40 |
|
0.50–0.80 |
0.045 max |
0.40 |
0.10 |
0.63 |
|||
|
C45 |
|
0.42–0.50 |
0.40 |
|
0.50–0.80 |
0.045 max |
0.40 |
0.10 |
0.63 |
|||
|
C55 |
|
0.52–0.60 |
0.40 |
|
0.60–0.90 |
0.045 max |
0.40 |
0.10 |
0.63 |
|||
|
C60 |
|
0.57–0.65 |
0.40 |
|
0.60–0.90 |
0.045 max |
0.40 |
0.10 |
0.63 |
|||
|
C22E |
|
0.17–0.24 |
0.40 |
|
0.40–0.70 |
0.030 max |
0.40 |
0.10 |
0.63 |
|||
|
C22R |
|
0.020–0.040 |
– |
|
– |
– |
– |
– |
– |
|||
|
C35E |
|
0.32–0.39 |
0.40 |
|
0.50–0.80 |
0.030 max |
0.40 |
0.10 |
0.63 |
|||
|
C35R |
|
0.020–0.040 |
– |
|
– |
– |
– |
– |
– |
|||
|
C40E |
|
0.37–0.44 |
0.40 |
|
0.50–0.80 |
0.030 max |
0.40 |
0.10 |
0.63 |
|||
|
C40R |
|
0.020–0.040 |
– |
|
– |
– |
– |
– |
– |
|||
|
C45E |
|
0.42–0.50 |
0.40 |
|
0.50–0.80 |
0.030 max |
0.40 |
0.10 |
0.63 |
|||
|
C45R |
|
0.020–0.040 |
– |
|
– |
– |
– |
– |
– |
|||
|
C50E |
|
0.47–0.55 |
0.40 |
|
0.60–0.90 |
0.030 max |
0.40 |
0.10 |
0.63 |
|||
|
C50R |
|
0.020–0.040 |
– |
|
– |
– |
– |
– |
– |
|||
|
C55E |
|
0.52–0.60 |
0.40 |
|
0.60–0.90 |
0.030 max |
0.40 |
0.10 |
0.63 |
|||
|
C55R |
|
0.020–0.040 |
– |
|
– |
– |
– |
– |
– |
|||
|
C60E |
|
0.57–0.65 |
0.40 |
|
0.60–0.90 |
0.030 max |
0.40 |
0.10 |
0.63 |
|||
|
C60R |
|
0.020–0.040 |
– |
|
– |
– |
– |
– |
– |
|||
Physical
Properties (Typical)
Density:
approximately 7.85 g/cm³
Melting Point: approximately 1425–1540°C
Modulus of Elasticity: approximately 210 GPa
Thermal Conductivity: approximately 45–50 W/m·K
Key Features
of EN 10083-2 Alloy Steel
High
Strength and Toughness
Quenched and tempered grades provide excellent strength and impact resistance
for engineering applications.
Wide Range
of Carbon and Alloy Content
Enables selection of material based on required hardness, machinability, and
strength.
Excellent
Wear Resistance
Medium carbon and alloy steels perform well in components subject to friction,
bending, and torsion.
Good
Weldability
Normalized grades offer excellent weldability, while quenching and tempering
requires controlled procedures.
Machinability
and Formability
Easier machining in normalized condition; quench & tempered grades may
require carbide tooling.
Uniform
Mechanical Properties
EN 10083-2 ensures consistent tensile, yield, and elongation properties across
the bar length.
Typical
Applications of EN 10083-2 Alloy Steel
Automotive and Transport Components
Axles,
shafts, gears, and fasteners
Connecting rods and mechanical pins
Engineering and Machinery
Machine frames and components
Bolts, studs, and couplings
Tooling and dies for moderate-strength applications
Energy and Heavy Industry
Crane parts
and lifting equipment
Rollers, spindles, and shafts
General Engineering Applications
Structural bars, rods, and forged components
High-strength pins, studs, and shafts for machinery
Conclusion
EN 10083-2
Alloy Steel Bars are versatile, high-performance steels designed for
engineering applications requiring strength, toughness, and wear resistance.
With multiple grades available in normalized or quenched and tempered
condition, these steels are suitable for automotive, machinery, and heavy
engineering components where reliable mechanical properties and dimensional
stability are critical.
For size availability, technical specifications, or customized requirements,
contact Ladhani Metal Corporation.
info@ladhanimetals.com
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