Process development & qualification

At Stirtec, weld qualification is carried out in full accordance with the current FSW standard ISO 25239:2020. Our advanced in-house infrastructure enables metallographic cross-section analyses, allowing us to deliver reliable assessments of weld quality within just a few hours. Adjustments or process optimizations can therefore be implemented immediately – without long waiting times e.g. at external testing laboratories. For mechanical evaluations, our technology center is equipped with a testing machine for tensile and compression tests, as well as a workshop press for guided bend tests on welded samples, including both face and root bend tests. This setup allows us to determine fracture behavior, strength, and initial material characteristics, identify load limits, and detect potential weaknesses at an early stage.

For extended material analyses, we collaborate with accredited external partners and institutes – covering hardness measurements, pulsation and fatigue tests. Further microscopic investigations can also be conducted, such as scanning electron microscopy (SEM) combined with energy-dispersive X-ray spectroscopy (EDX), electron backscatter diffraction (EBSD), or atom probe tomography (APT). If required, X-ray or CT inspections can be performed to visualize internal structures, porosity, or defects in components non-destructively.

With this broad spectrum of testing methods, we provide you with in-depth insight into materials, components, and weld seams, which can be directly incorporated into process optimizations and series releases. Upon completion, you receive an official qualification report confirming your process reliability and compliance with the applicable standards.

A particular advantage for our customers: Stirtec actively participates in the international FSW standards committee, directly contributing to the ongoing development of FSW regulations. This insider know-how flows directly into your projects and ensures that your components and processes not only meet current requirements but also remain technologically future-proof.