TAGS: EN 10083-1 | steel grade | 27MnCrB5-2 | alloy steel |
EN 10083-3 is a European standard that specifically focuses on the technical delivery conditions for alloy steels for quenching and tempering. It provides guidelines for the production, testing, inspection, and delivery of these alloy steels.
The standard covers a wide range of alloy steel grades used in various industries such as automotive, machinery, and construction. It includes both non-alloy and alloy steels with different compositions and properties. The steels are intended for heat treatment after quenching and tempering to achieve the desired mechanical properties.
EN 10083-3 specifies requirements for the chemical composition of the alloy steels, including elements such as carbon, manganese, silicon, phosphorus, sulfur, chromium, molybdenum, nickel, vanadium, and others. It also sets limits on the permissible deviations in the chemical composition.
Mechanical properties, such as tensile strength, yield strength, elongation, and impact energy, are defined in the standard. Hardness values are specified to ensure the steels meet the required hardness levels after the heat treatment process. Other characteristics, including grain size, surface quality, and internal soundness, are also addressed.
The standard provides guidelines for heat treatment processes, such as quenching and tempering, to achieve the desired properties in the alloy steels. It outlines parameters for heating and cooling rates, soaking temperatures, and durations of each stage of the heat treatment process.
EN 10083-3 ensures that the delivered alloy steels meet specific quality standards and can be processed effectively for their intended applications. Manufacturers and users of steel products refer to this standard to ensure compliance with the specified technical requirements and to guarantee the consistent quality of the produced materials.
EN 10083-3 Grade 27MnCrB5-2 is a specific grade of alloy steel specified in the EN 10083-3 standard. This grade is designed for quenching and tempering processes and is typically delivered in a quenched and tempered condition (+QT).
Grade 27MnCrB5-2 is characterized by the following composition:
Approximate carbon content: 0.24-0.30%
Manganese (Mn): 1.10-1.40%
Chromium (Cr): 0.30-0.60%
Boron (B): 0.0008-0.0050%
EN 10083-3 Grade 27MnCrB5-2 alloy steel grade with good hardenability, strength and wear resistance. It is commonly used in applications that require high surface hardness and improved mechanical properties, such as gears, shafts, and other components subjected to high stress and wear.
EN 10083-3 specifies the technical delivery conditions for Grade 27MnCrB5-2 in a quenched and tempered state (+QT). The standard outlines requirements for chemical composition, mechanical properties, hardness values, and other relevant characteristics for this specific grade.
Mechanical properties specified in the standard include minimum and maximum values for tensile strength, yield strength, elongation, and impact energy. Hardness values are also defined to ensure the desired hardness levels can be achieved through appropriate heat treatment processes.
The quenching and tempering process described in the standard involves heating the steel to a specified temperature, followed by rapid cooling (quenching) and subsequent tempering at a lower temperature. This process is intended to achieve the desired mechanical properties and hardness in the steel.
B-alloyed tempering steel for general machine engineering.The steel is shearable in the non treated condition.
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Property
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Temperature
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Value
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Comment
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Density
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23.0 °C
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7.8 g/cm³
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Typical for Steel
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Property
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Temperature
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Value
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Comment
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|---|---|---|---|
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Elastic modulus
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23.0 °C
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190 - 210 GPa
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Typical for Steel
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Elongation
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20.0 °C
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14 - 15 %
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Poisson's ratio
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23.0 °C
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0.3 [-]
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Typical for Steel
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Reduction of area
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20.0 °C
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55 %
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Tensile strength
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20.0 °C
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800 - 1250 MPa
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Yield strength
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20.0 °C
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700 - 800 MPa
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Property
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Value
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|---|---|
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Boron
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8E-4 - 5E-3 %
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Carbon
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0.24 - 0.3 %
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Chromium
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0.3 - 0.6 %
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Copper
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0.4 %
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Manganese
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1.1 - 1.4 %
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Phosphorus
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0.03 %
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Silicon
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0.4 %
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Sulfur
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0.035 %
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