1230 - 1399 Prüfung der mechanischen Eigenschaften

Drop weight test according to W.S. Pellini Publication: December 1982

Impact bending test, description and sample preparation Publication: April 1990

Relaxation test at elevated temperature with bolted joint models Publication: May 1996 This standard specifies the method for relaxation testing of bolted joint models at elevated temperatures to determine the relaxation behaviour of the bolting material. The changes in length of the threaded bolt are determined a) by means of a mechanical measuring device (model A) or b) by means of strain gauges (model B).

Determination of mechanical properties of joined sheet metal materials in the tensile test at high test speeds Publication: August 2013 The present test guideline considers specimens joined by automotive industry methods. Joints made by processes employed in the fabrication of semifinished products (tailored blanks) do not fall within the scope of this document. This guideline applies to testing of single-shear joined sheet steel specimens wherein no individual sheet material has a thickness exceeding 3 mm and both joined elements consist of the same steel grade and have the same coating and thickness (Note 1).

Determination of mechanical properties of sheet metal materials at high strain rates in high-speed tensile tests Publication: February 2007

SEP 1240 Testing and Documentation Guideline for the Experimental Determination of Mechanical Properties of Steel Sheets for CAE-Calculations, 2nd edition, German version This STAHL-EISEN test specification (SEP) describes selected mechanical tests on thin sheets of steel and their documentation. This SEP is the basis for unified material property determination for CAE calculations and shall standardize the data exchange between test institutes, material suppliers and automotive producers. ∙ General pre-treatment of samples, designation of specimens ∙ General test conditions, test equipment ∙ Elastic and plastic material properties from the tensile test ∙ Plastic material properties from the forming limit curve ∙ Dynamic material properties – high speed tensile testing ∙ Cyclic material properties ∙ Fracture properties for crash and forming simulation The annex contains examples of standardized data files (data header) for all tests, images, tables as well as an example test report. Compared to the 1st edition (2006) numerous changes were carried out, and clause d for crash and forming simulation was supplemented (correlation to SEP 1237). Due to the large extent, the SEP was subdivided into two separate language versions. Publication: January 2026 Language: English

SEP 1240 Testing and Documentation Guideline for the Experimental Determination of Mechanical Properties of Steel Sheets for CAE-Calculations, 2nd edition, German version This STAHL-EISEN test specification (SEP) describes selected mechanical tests on thin sheets of steel and their documentation. This SEP is the basis for unified material property determination for CAE calculations and shall standardize the data exchange between test institutes, material suppliers and automotive producers. ∙ General pre-treatment of samples, designation of specimens ∙ General test conditions, test equipment ∙ Elastic and plastic material properties from the tensile test ∙ Plastic material properties from the forming limit curve ∙ Dynamic material properties – high speed tensile testing ∙ Cyclic material properties ∙ Fracture properties for crash and forming simulation The annex contains examples of standardized data files (data header) for all tests, images, tables as well as an example test report. Compared to the 1st edition (2006) numerous changes were carried out, and clause d for crash and forming simulation was supplemented (correlation to SEP 1237). Due to the large extent, the SEP was subdivided into two separate language versions. Publication: January 2026 Language: German

SEP 1237: Testing and Documentation Guideline for the Experimental Determination of Fracture Properties for Crash and Forming Simulation, 1st Edition This Stahl-Eisen test specification (SEP) specifies experimental tests for determination of the following fracture properties: fracture strain at uniaxial tension (specimens with a hole respective with notches), at plane strain under tension and at biaxial tension. The different test types are described separately and extensively. (SEP 1240 clause 9 contains the condensed version) Publication: January 2026

Weld-on bending test Publication: June 1996

SEP 1245: Release process for steel sheet for automotive applications (cold forming), 2nd edition, October 2024 As part of the joint work between the automotive and steel industries, the phases of the material approval process were defined for the introduction of newly developed steel grades into series production in automotive engineering. The material approval process serves to define the necessary qualification steps for steel sheet up to series production readiness. In order to assess new steel grades with regard to their suitability for series use in automotive engineering, a test matrix is specified to determine a broad database. The results of these tests are a necessary prerequisite for the approval of a steel grade by a customer (OEM). The following changes have been made compared to the 1st edition 2011: In addition to the four phases, there is the milestone SST start of series production. Source approval has been added. Publication of the 2nd edition: October 2024

Testing and documentation guideline for the experimental determination of mechanical parameters of thin steel sheets for CAE calculation Publication: July 2006

Determination of the modulus of elasticity of steel materials Publication: September 2012