HFMI - High Frequency Mechanical Impact

Pneumatic Impact Treatment (PIT) is currently the international leading HFMI process. It achieves the following effects in a very effective and reproducible manner, as needed:

Banner Messe Schweissen und Schneiden 2017

A significant increase in the fatigue resistance or fatigue life of dynamically stressed constructions

Using PIT you may, for instance, increase a transverse weld from an S355 from FAT 80 to FAT 125. You may even reach FAT 180 for higher yield strengths and will thereby be able to significantly increase the fatigue resistance of existing constructions or exploit significant material savings potentials.

We achieve this effect even on already pre-stressed equipment, thereby potentially improving their availability hugely.


Avoidance or reduction of stress corrosion cracking (SCC)

By superimposing residual tensile stress over residual compressive stress on the surface of the material, we will generally remove the source of stress fracture corrosion completely.


Clear reduction of shrinkage strain and thereby distortion

Pitting of the surface of all layers of a weld will ultimately clearly reduce tensile and shrinkage strains, which will correspondingly mitigate potential distortion.

We will be pleased to personally demonstrate PIT technology and its substantial potential to you and your colleagues, also on-site at your company!

>> Contact us >> Learn more about PIT