Stahlinstitut VDEh https://vdeh.de/en/standardisation/stahl-eisen-blaetter/ – 16.07.2024

Stahl-Eisen-Blätter

Stahl-Eisen-Blätter

The Stahl-Eisen-Blätter of the Steel Institute VDEh include the Stahl-Eisen-Prüfblätter (SEP), -Werkstoffblätter (SEW), -Lieferbedingungen (SEL) and -Einsatzlisten (SEE) as well as -Betriebsblätter (SEB). These are technical guidelines which are created in the course of joint work in technical-scientific specialist groups (working committees) and published in German and, for some years now, also in English.

The basic objectives of the Stahl-Eisen-Blätter are:

  •  Description of the latest technologies to ensure the quality of processes and products
  •  Description of the property profiles of steels for which standardisation is not yet possible
  •  Standardisation of the test conditions and description of material properties of different eel groups
  • Documentation of the available expert knowledge
  • Consideration of the specific requirements of the steel industry
  • Consensus-building by the experts
  • Accelerating of the implementation of new knowledge into application
  • Preliminary work for DIN, CEN and/or ISO standards

Every expert and every company or research institution which is interested in these Stahl-Eisen- Blätter has the unrestricted opportunity to contribute in the work. It is requested that the Stahlinstitut VDEh be informed immediately if any inaccuracies or the possibility of incorrect interpretation become apparent in the application of the sheets, so that any deficiencies can be rectified.

Stahl-Eisen-Prüfblätter (SEP)

SEP contain guidelines and information on the proper implementation of tests to determine certain material properties and characteristic values of steels. The purpose of the SEP is to standardise the test conditions in pre-standardisation in such a way that the test results are comparable when used properly. SEP are often incorporated into customer specifications and contribute significantly to reducing the testing effort for steel producers and -users. Customers in the steel industry require such characteristic values, e. g. for the construction or technical security of components (lightweight construction, resource conservation).

Stahl-Eisen-Werkstoffblätter (SEW) und -Lieferbedingungen (SEL)

SEW and SEL serve to standardise the functional characteristics of steels in pre-standardisation. Both the knowledge of steel producers and steel users are taken into account regarding the application. The purpose of SEW and SEL is to describe the property profiles of steels for which standardisation has not yet taken place, but which are important for steel producers, -processors and -users. This description is intended to enable a targeted use of the steels and at the same time to gather knowledge about their production, delivery and application and their product forms.

Stahl-Eisen-Einsatzblätter (SEE)

According to current knowledge, SEE serve as a recommendation for the appropriate selection of steels for tools used in certain forming processes.

Stahl-Eisen-Betriebsblätter (SEB)

Special requirements of the steel industry are defined in SEB in order to standardise the planning, production, assembly and maintenance of metallurgical plants and thus be able to carry them out safely and economically. According to SEB, the interchangeability with regard to the connecting dimensions is also guaranteed. In addition to dimensions, materials and calculation methods, they also contain specifications for ordering, delivery and quality assurance. They also consider the issues of occupational safety and environmental protection for the operation of plants.

Sheets in public survey

In this section, finished sheets are published for reasons of transparency. The downloads are working versions and are not valid until official publication. Published STahl-Eisen-Blätter can be purchased in the Steel Data Shop.

All companies, research institutes and experts associated with these topics are given the opportunity to review, supplement and comment. Comments are possible within a period of 6 weeks after publication. These will be checked by the authors and then taken into account if necessary. Comments are requested to stefanie.brockmann_at_vdeh.de. Please use this table template for this purpose.

SEP SEP 1220-1

Ladies and Gentlemen,

Final drafts of Stahl-Eisen specifications are published for reasons of transparency. All companies, research institutions and other experts interested in these specialist topics are therefore given the opportunity to review and comment on the drafts.

We would like to inform you that the final drafts of the new Stahl-Eisen test specifications (SEP)
SEP 1220 - Test and Documentation Guideline for the Suitability of Steel Sheet for Joining – Part 1: General specifications. 2nd Edition

SEP 1220 - Test and Documentation Guideline for the Suitability of Steel Sheet for Joining – Part 2: Resistance Spot Welding. 2nd Edition

are completed and submitted to the public for examination. These are working drafts which are not intended for application until the publication of the final version. We kindly ask you to review the attached drafts and to send us your comments by 31/07/2024 at the latest to ingo.steller_at_vdeh.de.

Please use the attached DIN template for your comments: /media/comments_sep1220-1_2024-06.pdf

Statement until: July 31st, 2024 Download draft

SEP SEP 1220-2

Ladies and Gentlemen,

Final drafts of Stahl-Eisen specifications are published for reasons of transparency. All companies, research institutions and other experts interested in these specialist topics are therefore given the opportunity to review and comment on the drafts.

We would like to inform you that the final drafts of the new Stahl-Eisen test specifications (SEP)

SEP 1220 - Test and Documentation Guideline for the Suitability of Steel Sheet for Joining – Part 1: General specifications. 2nd Edition

SEP 1220 - Test and Documentation Guideline for the Suitability of Steel Sheet for Joining – Part 2: Resistance Spot Welding. 2nd Edition

are completed and submitted to the public for examination. These are working drafts which are not intended for application until the publication of the final version. We kindly ask you to review the attached drafts and to send us your comments by 31/07/2024 at the latest to ingo.steller_at_vdeh.de.

Please use the attached DIN template for your comments: /media/comments_sep1220-2_2024-06.pdf

Statement until: July 31st, 2024 Download draft

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 6 bis 10

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

SEP 1240

Testing and Documentation Guideline for the Experimental Determination of Mechanical Properties of Steel Sheets for CAE-Calculations

SEP 1245

Description of the mile stones in the Material Approval Process

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

SEW 550

Steels for heavy forgings – Quality requirements

SEW 555

Steels for heavy forgings for turbine and generator components

Recently published sheets

SEP 1220-5 (1. Ausgabe, 12.2020) new

When developing new materials before they are launched on the market as part of the material approval process the steel producers prove not only the basic material characterisation, but also the processability in terms of joining technology. The reason for this is the requirement for compatibility with the entire further processing process. In the past these tests were carried out according to the specifications of the individual automobile manufacturers. This resulted in a large and cost-intensive test effort which significantly delayed the introduction of new steels and made them unnecessarily expensive.

For this reason the Stahl-Eisen-Prüfblatt (SEP) 1220 was developed and published in 2011 in which the material approval process is described with regard to the joinability. The aim was to create a standardised approval procedure which is recognised by steel manufacturers and users, not only to accelerate the introduction of new materials, but also to simplify the provision of data and the comparability of test results. Part 1: General specifications, Part 2: Resistance spot welding, Part 3: Laser beam welding and Part 4: MIG-brazing were published with the issue date 8.2011.

The 1st edition of Part 5: Gas Metal Arc Welding (GMAW) could now be published with issue date 12.2020. The test methods specified in this Stahl-Eisen-Prüfblatt (SEP) are used to determine the suitability of steel sheets for the joining process of gas-shielded metal arc welding (process ISO 4063:135).

The Stahl-Eisen-Prüfblatt (SEP) 1220 describes methods for determination of the joinability of steel sheets without / with surface coating and the documentation of the results. It is meant as a basis for standardised material characterisation by welding, brazing, mechanical joining and adhesivebonding and is intended to standardise the exchange of data between material suppliers, car manufacturers and their suppliers. The SEP 1220 specifies the requirements for implementation. The joinability is assessed by the user based on the results of the joining test and documentation guideline and the specific application.

The basic structure of an SEP for the material approval process of joinability includes both the shape specimen and specimen preparation, the test methods and test conditions used as well as specifications for the experimental procedure up to the subsequent documentation of the test data. However, the results are not evaluated as this should be done depending on the particular application and the user.

SEP 1220-5 can be ordered from StahlDaten Shop or Beuth Verlag.

Your contact person

Dr.-Ing. Stefanie Brockmann

Dr.-Ing. Stefanie Brockmann

Executive Member of the Managing Board

Stahlinstitut VDEh
Sohnstraße 65
40237 Düsseldorf

Telefon: +49 211 6707-159
stefanie.brockmann_at_vdeh.de