A welding auxiliary joining part with which a welding connection, in particular a resistance welding connection, is establishable between a first component of poorly weldable material and a second component of weldable material, which comprises the following features: a. a punch shaft which is punchingly pressable into the first component approximately rotation-free, which extends along a longitudinal axis of the welding auxiliary joining part and which has an element head at a first axial end and a welding contact zone projecting in the axial direction from the punch shaft at a second axial end, b. the element head extends radially beyond the punch shaft and comprises a head upper side facing away from the shaft and a head underside facing towards the shaft, which are connected to one another by means of a circumferential face which radially delimits the element head, characterized in that c. the head underside comprises at least one first clamping ring which extends around the punch shaft in a closed manner and projects axially in the direction of the punch shaft, c1. which is arranged at a first radial distance from the punch shaft, c2. which has a triangular-like cross-sectional shape which tapers in the axial direction of the punch shaft, and c3. which is arranged at a side facing away from the punch shaft radially spaced from the circumferential face of the element head, wherein c4. the axial cross sectional shape of the clamping ring is formed by a radially inner ring side and a radially outer ring side, the inner ring side of which encloses with the punch shaft an inclination angle α in the range of 10° ≤ α ≤ 70°. a. a punch shaft which is punchingly pressable into the first component approximately rotation-free, which extends along a longitudinal axis of the welding auxiliary joining part and which has an element head at a first axial end and a welding contact zone projecting in the axial direction from the punch shaft at a second axial end, b. the element head extends radially beyond the punch shaft and comprises a head upper side facing away from the shaft and a head underside facing towards the shaft, which are connected to one another by means of a circumferential face which radially delimits the element head, characterized in that c. the head underside comprises at least one first clamping ring which extends around the punch shaft in a closed manner and projects axially in the direction of the punch shaft, c1. which is arranged at a first radial distance from the punch shaft, c2. which has a triangular-like cross-sectional shape which tapers in the axial direction of the punch shaft, and c3. which is arranged at a side facing away from the punch shaft radially spaced from the circumferential face of the element head, wherein c4. the axial cross sectional shape of the clamping ring is formed by a radially inner ring side and a radially outer ring side, the inner ring side of which encloses with the punch shaft an inclination angle α in the range of 10° ≤ α ≤ 70°. c1. which is arranged at a first radial distance from the punch shaft, c2. which has a triangular-like cross-sectional shape which tapers in the axial direction of the punch shaft, and c3. which is arranged at a side facing away from the punch shaft radially spaced from the circumferential face of the element head, wherein c4. the axial cross sectional shape of the clamping ring is formed by a radially inner ring side and a radially outer ring side, the inner ring side of which encloses with the punch shaft an inclination angle α in the range of 10° ≤ α ≤ 70°.