Unalloyed quenched and tempered steel

Unalloyed quenched and tempered steel

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QualityMaterial-No.Standard
C221.1151 (1.0402)DIN EN 10083-2Details
C251.0406DIN EN 10083-2Details
C301.0528DIN EN 10083-2Details
C351.1181 (1.0501)DIN EN 10083-2Details
C401.1186 (1.0511)DIN EN 10083-2Details
C451.1191 (1.0503)DIN EN 10083-2Details
C501.1206 (1.0540)DIN EN 10083-2Details
C551.1203 (1.0535)DIN EN 10083-2Details
C601.1221 (1.0601)DIN EN 10083-2Details
C10E1.1121DIN EN 10084Details
C10R1.1207DIN EN 10084Details
C15E1.1141DIN EN 10084Details
C15R1.1140DIN EN 10084Details
C16E1.1148DIN EN 10084Details
C16R1.1208DIN EN 10084Details
C10E1.1121DIN EN 10132-2Details
C15E1.1141DIN EN 10132-2Details
16MnCr51.7131DIN EN 10132-2Details
17Cr31.7016DIN EN 10132-2Details

Quenched and tempered steels and case-hardened steels for special heat treatment processes in accordance with DIN EN 10083-2, DIN EN 10084 and DIN EN 10132-2

Quenched and tempered steels and case-hardened steels are among the most versatile material groups in the metal industry and are used for mechanical components subject to high stresses due to their high strength and wear resistance. The DIN EN 10083-2 standard defines the chemical composition and properties of unalloyed quenched and tempered steels in order to meet the requirements for components such as shafts, bolts and gears. Case-hardening steels according to DIN EN 10084 are characterized by a hard surface layer and a tough core, which makes them particularly suitable for components with high surface loads such as gears and shafts. Cold-rolled steel strip for heat treatment, which falls under DIN EN 10132-2, is used particularly in precision applications where a fine microstructure and high surface quality are required.

Heat treatment conditions and their significance

The specific heat treatment is decisive for the desired mechanical properties of these steels. The DIN standards specify various heat treatment conditions in order to optimally adapt the usability and properties of the steel to the requirements of the applications.

Untreated (code letter: without code letter or +U)
The untreated condition refers to steel that has not undergone any specific heat treatment. This condition is often used for further machining processes such as cutting or forming. As the steel in this condition has a relatively soft structure, it is well suited for a variety of cold working processes.
Treated for shearability (code letter: +S)
This condition is specially intended for steel products that are optimized for cutting and shearing work. Targeted heat treatment is used to set a hardness that optimally prepares the steel for shearing processes without cracks or unwanted deformations occurring.
Soft-annealed (code letter: +A)
Soft-annealed steels are characterized by high formability and low hardness, which is achieved by slow cooling. This condition is often used as preparation for forming processes, as it ensures better machinability. Soft-annealed case-hardening steels and heat-treatable steels are easier to form into the desired shape before they are subjected to further hardening.
Normalized (code letter: +N)
The normalized condition gives the steel a uniform structure and ensures improved toughness and strength. Normalizing takes place at temperatures just above the critical temperature and ensures a fine-grained structure. This treatment increases the load-bearing capacity and homogeneity of the microstructure, which makes it particularly interesting for components with high mechanical load-bearing capacity requirements.
Quenched and tempered (code letter: +QT)
The quenched and tempered condition involves a combination of hardening and tempering and is typical for quenched and tempered steels. This heat treatment achieves the high strength and toughness required for components subject to heavy loads. Quenched and tempered case-hardening steels and heat-treatable steels have a high degree of wear resistance and a hard surface, making them ideal for highly stressed machine components.

Areas of use and variety of applications

The various standards and heat treatment processes ensure that the materials meet the specific requirements of industrial practice. Unalloyed quenched and tempered steels in accordance with DIN EN 10083-2 are used in structural parts such as drive shafts and gear wheels that have to withstand mechanical loads. Case-hardening steels in accordance with DIN EN 10084 offer an ideal combination for components that require a high surface hardness thanks to their hard surface layers and tough cores. Finally, cold-rolled strip in accordance with DIN EN 10132-2, which is optimized for heat treatment, ensures a fine microstructure and excellent surface quality that is suitable for precise applications.

Strict compliance with DIN standards ensures that material quality is controlled and optimized so that the end products are reliable and durable.

Quality Guide Download: Unalloyed quenched and tempered steel

Behind this download you will find our ESB Quality Guide (data sheet) for unalloyed heat-treatable steel.

QG DOWNLOAD
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