Stahlinstitut VDEh – 29.11.2020



Sheets in public survey

There are currently no drafts in the public consultation.

Sheets in revision

SEP 1220 - Teile 1 bis 4

Testing and Documentation Guideline for the Joinability of thin sheet of steel, Part 1: General specifications; Part 2: Resistance Spot Welding; Part 3: Laser beam welding; Part 4: MIG-Brazin

SEP 1220 – Teile 5 bis 10 new

Testing and Documentation Guideline for the Joinability of thin sheet of steel, Part 5: Gas Metal Arc Welding, Part 6: Adhesive Bonding, Part 7: Projection Welding of Fasteners, Part 8: Drawn

SEP 1245

Description of the mile stones in the Material Approval Process

SEP 1520

Microscopical examination of the carbide morhology in steels using comparison charts

SEP 1584

Blue fracture test for the evaluation of steels on macroscopic non-metallic inclusions

SEP 1680

Drawing time-temperature-transformation diagrams for ferrous alloys

SEP 1681

Guidelines for preparation, execution and evaluation of dilatometric transformation tests on iron alloys

SEP 1931

Prüfung der Haftung von Zinküberzügen auf feuerverzinktem Feinblech, Kugelschlagprüfung

SEP 1942 new

Cup test for the determination of surface waviness after stretch forming

SEW 089

Unalloyed and alloyed heat-resistant ferritic steels – preheating during welding

SEW 550

Steels for heavy forgings – Quality requirements

SEW 555

Steels for heavy forgings for turbine and generator components

SEE 201

Materials for tools in tube and extrusion presses for the processing of copper and copper alloys

SEE 202

Hot forming tool materials for tools in extrusion presses for the processing of aluminum and aluminum alloys

Recently published sheets

SEP 1572 (2. Ausgabe 03.2019)

The Stahl-Eisen-Prüfblatt (SEP) 1572 "Microscopic testing of free-cutting steels for sulfide non-metallic inclusions using standard images" was published in 1971 in order to be able to characterize the formation of inclusions also in steels with deliberately high inclusion content. The test sheet was designed for manual evaluation by means of image reference series and is not directly accessible for image analysis.

The SEP 1572 has now been revised, including the image reference series, with the aim of enabling both manual and image-analytical testing and at the same time ensuring the highest possible correspondence to the 1971 edition. The 2nd edition with issue date March 2019 was published by the Steel Institute VDEh.

The SEP 1572 is published for the first time in English and describes the testing for sulfide particles on the ground joint sample. It applies to free cutting steels, but can also be applied to other steel grades (e.g. with a controlled sulphur content) by agreement. The test can be performed manually by means of a straightening sequence or automatically by means of image analysis systems. In order to minimize the difference between manual and automatic evaluation, the classifications follow a mathematical system. This system has been chosen so that it is in good agreement with the reference series of SEP 1572:1971.

Since, in contrast to manual evaluation, image analysis can be used to determine statistical parameters of the sulfide distribution, a simple Java image analysis tool can be obtained free of charge from the Steel Institute VDEh. If you are interested, please contact

SEP 1572 can be ordered from StahlDaten Shop or Beuth Verlag.

SEP 1611 (1. Ausgabe 10.2018)

Steel line pipes made of hot-rolled pre-products are often used for the transport of various media (e.g. gas, oil, service and waste water). Slabs produced by continuous casting are used as blanks for the production of these pre-products. Depending on the process and material, core segregation occurs during solidification of the steel. This is differently pronounced depending on the boundary conditions and can have an influence on the processing and service properties.
For quality and process monitoring, especially in the production of steels for pipe manufacture, various methods have therefore been developed in the past for evaluating the core zone of continuously cast slabs (e.g. Mannesmann guideline series), which do not, however, have the status of a generally accessible standard or guideline. Such methods are based on the fact that segregation-related dark areas in the core zone of a slab can be detected after macro-etching.

In the first edition of Stahl-Eisen-Prüfblatt (SEP) 1611 "Evaluation of the segregation structure of the core zone on cast slabs", published by the Steel Institute VDEh with issue date October 2018, various procedures established in practice for evaluating the slab core zone are now brought together based on the current state of the art. For this purpose, the process of sampling, sample preparation, test method, evaluation procedure and the required documentation are specified. Various methods can be used for evaluation: Image directional series, measuring procedures using circular templates or area measuring procedures using digital image analysis.

SEP 1611 can be ordered from StahlDaten Shop or Beuth Verlag.

SEP 1950 (4. Ausgabe 07.2020)

Open-die forges produce heavy forgings for power engineering. Typical components are forged

Components for gas and steam turbines. The shafts used for this purpose must not be bent under operating conditions which would cause high imbalance and thus increased shaft vibrations in the bearings.

The heat stability test is a quality assurance measure to ensure that the shaft runs stably at elevated temperatures. Test criteria for the test were first laid down in 1966 in Stahl-Eisen-Prüfblatt (SEP 1950. In the meantime, the 3rd edition of 1997 has been adapted to the state of the art with the participation of operators of open-die forging shops and energy plant manufacturers, after measurement technology in this area has undergone significant further development. With issue date July 2020, the Steel Institute VDEh publishes the 4th edition of SEP 1950 with the title "heat stability test on shafts", for the first time also with English translation.

The SEP 1950 can be ordered from Beuth Verlag.

SEW 605 (1. Ausgabe 07.2019)

The reduction in the weight of vehicle components has led to more filigree components and the use of high-strength materials. Conventional solutions using heat-treatable steels do not always meet all requirements in terms of technical reliability, economy and environmental friendliness. Continuously cooled bainitic steels, as they can be produced in the austenitic range as a result of hot forming, are in some cases much better able to combine the above-mentioned aspects, which has led to the successful introduction of such components in automobiles over the past decade. This trend is reflected in a large number of commercially available steel bars and wire rod products. In order to ensure the necessary hardenability, these products are characterized by increased manganese contents, sometimes in combination with chromium, molybdenum and nickel. Such steels are not described in any existing material standard today.

The Stahl-Eisen- Werkstoffblatt (SEW) 605 was published by the Steel Institute VDEh with issue date July 2019 and offers customers a general description of this new class of steel. For naturally cooled steel products, the cooling rate varies depending on the part geometries (or bar steel diameters). In order to achieve constant properties, the steel composition (especially the manganese and chromium content) is adjusted to the respective natural cooling rates.

SEW 605 can be ordered from StahlDaten Shop or Beuth Verlag.

Your contact person

Dr.-Ing. Stefanie Brockmann

Dr.-Ing. Stefanie Brockmann

Leiterin Werkstofftechnik

Head of Materials Engineering

Stahlinstitut VDEh
Sohnstraße 65
40237 Düsseldorf

Telefon: +49 211 6707-159