White Papers


White Papers


Sebastian Trenz
State-certified mechanical engineer
Expert mechanical processing

+49 8106 9941 55


Florian Pribul
Industrial Mechanic
Workshop and apparatus engineering

+49 8106 9941 45

Sample preparation for metallic tensile tests

Standard tensile tests on sheet metal, pipes, castings and forgings are manufactured according to the relevant standards DIN EN ISO 6892-1, DIN 50125 and LN 29512. For sheet metal and tube samples, strips can be removed with a standard head width (e.g. 30 mm with tension rod H 20 x 80), From which the required tension rods are worked with millings. For the studies on waisted and perforated flat samples, samples are to be produced by milling and drilling. Before milling in the tensile test, the sample blank has to be checked on facile damages such as scratches, dents, or others. The sample blank is milled on a milling machine MAHO 600 P with a simple numerical control. For this purpose the blank is mounted in a chuck matched to the sample size. All processing steps are carried out with a suitable cooling lubricant to protect the sample from heating and to achieve the best possible surface quality (Rz 20 -40).

Sampling of large components

We also take samples from large and bulky damaged pieces. Thereby is, in most cases, only one attempt possible. It is important that the part to be tested is not influenced in any way by the separation process, such as excessive heating of the component.

The hardness of the material plays no role for us. With our high-performance bandsaws, we can cut bearing rings, crankshafts, turbine blades and all other conceivable components with virtually no thermal stress.

The exact sample position can be agreed with the customer.
Usually, pieces are removed for grinding preparations and X-ray fluorescence analysis or existing cracks are broken open to analyze the fracture surface.


[Translate to English:] Probenentnahme Fräsen
[Translate to English:] Probenentnahme Fräsen
[Translate to English:] Getrennte Kurbelwellen aus der Serienprüfung
[Translate to English:] Präzisionstrennmaschine
[Translate to English:] Kolben geöffnet
[Translate to English:] Trennprozess an einem Kolben
[Translate to English:] Trennen eines Turbinensegmentes
[Translate to English:] Turbinensegment in horizontaler Bandsäge

Society for Materials Testing
Ensuring quality | Accompanying development | Analyzing damage | Passing on knowledge

GWP Gesellschaft für Werkstoffprüfung mbH
Georg-Wimmer-Ring 25
85604 Zorneding/München

Tel. +49 8106 994110
Fax +49 8106 994111

Handelsregister München
HRB 53245
USt.-IdNr. DE131179893

General Manager
Dr. Julius Nickl