How strong is the join?

If the welding is carried out carefully, properly and professionally, it can be assumed that the welded joint can withstand a greater static load than the stud or component. The fracture occurs when the load limit is exceeded outside the welding zone in the stud or in the base sheet material.

Therefore, the characteristic values of stud and plate are decisive for the strength calculation; the load-bearing capacity of the weld does not have to be taken into account mathematically.

The breaking force can thus be calculated from the minimum tensile strength of the materials, see also Notes on the calculation of stud welds in DVS 0967.

When calculating stud welded joints, a distinction must be made depending on the case of application and the applicable rules and regulations. A distinction is made between static or dynamic loads, compression, tension, bending or torsion. The design of the studs must therefore be carried out in such a way that the serviceability and load safety of the entire component are guaranteed.

For bolts according to DIN EN ISO 13918, the characteristic values for calculation - the yield strength (Rp / fy,b,k) and the tensile strength (Rm / fu,b,k) - are specified in the applicable material tables.

Calculation reference surface


DIN EN ISO 13918

Stud Type

Welding base diameter (smallest cross-section)


Threaded studs with reduced base

Stress Area

Threaded Studs


Threaded Studs


Internally threaded pin

Shear Connectors