On this page you will find information on available steel-related materials data such as

Data for the production and downstream processing of steel are available in the form of:

Computation formulae
Universally valid formulae derived from the chemical composition of steel melts to compute hardenability in end quench testing. These computation formulae are developed for specific steel families, such as quenched and tempered steels, or case-hardening steels, for example, with the aim of reducing specimen testing in the end quench hardenability test.

Diagrams

TTT diagrams
The Time-Temperature-Transformation diagram contains information about the start and end of austenite transformation during cooling. It represents, so to speak, an extension of the iron-carbon diagram into the third dimension, namely that of time. The variant for isothermal transformation shows the start and end of the transformation for each isotherm. Information is additionally provided about transformation structures and hardness. The continuous cooling diagram  shows these characteristics for every cooling curve. Information is also given regarding the type and amount of the transformation structures. Plotted for comparison purposes is the hardness measured at room temperature. Since recently, a differentiation has been made between DTTT diagrams, which consider prior deformation as well, and WTTT diagrams, also referred to as welding TTT diagrams, which additionally take account of the thermal cycles during welding.

Collection of tool damage data
In this collection, tool damage is systematically catalogued according to type and occurrence, and solutions to problems are offered at the same time.

Reference samples
These enable fast and easy characterisation of microstructural phenomena, such as carbide formation in steels, for example, if a quantitative evaluation is not possible, or possible only at considerable expense and effort. This visual method can also be used for other assessments, however, such as to analyse the detachment of particles from deposited coatings.

Data lists

Stahl-Eisen-Liste
Approximately2000 Europeanstandardised steel grades, as well as steels contained in Stahl-Eisen-Werkstoffblatt (SEW) material specifications and non-standardised steel grades on the Stahl-Eisen-Liste, are currently registered with the European Steel Registration Office.

Stahl-Eisen-Werkstoffblatt (SEW) 310
This SEW contains data on the following physical properties for approximately 500 steel grades:

• Density,
• Thermal expansion,
• Modulus of elasticity,
• Specific heat,
• Electrical resistivity,
• Thermal conductivity,
• Thermal diffusivity

Chemical composition

This provides information about a material's constituents from a quantitative and also qualitative viewpoint. The chemical composition of a steel gives an insight into the content of its alloy and incidental elements. It is monitored constantly during the steel production process.

Approximately2000 Europeanstandardised steel grades, as well as steels contained in Stahl-Eisen-Werkstoffblatt (SEW) material specifications and non-standardised steel grades on the Stahl-Eisen-Liste, are currently registered with the European Steel Registration Office.

Mechanical-technological properties
These include strength properties such as tensile, compressive and ultimate strength, elongation, reduction of area, creep rupture strength, fatigue limit, and notch impact energy in the various states, for instance quenched and tempered, or normalised. They are measured by means of tensile, compression, constant load, notched bar impact bending or fatigue testing.

Physical Properties
Physical properties are described in terms of heat capacity, elastic and magnetic characteristics, electrical and thermal conductivity and, lastly, optical characteristics. They also include however the crystal structure and atomic volume, because the physical properties also depend on the structure. Thissimilarly makes lattice defects or phase proportions of the structures important factors for the physical properties.

The Stahl-Eisen-Werkstoffblatt (SEW) 310 contains data on the following physical properties for approximately 500 steel grades:

• Density,
• Thermal expansion,
• Modulus of elasticity,
• Specific heat,
• Electrical resistivity,
• Thermal conductivity,
• Thermal diffusivity.