The right choice of material to be used has a decisive influence on the quality of the welding and the tool life of the electrodes. For further details and reference values regarding the correct choice of material, please refer to the chart below (see also DVS-leaflet 2903: electrodes for resistance welding).



! The welding of pure aluminium is only possible with laying a bi-metal layer in between.   
! As from Ms63 not weldable anymore. / From Ms63 can not be welded any more.
WIRBALIT® materials are supplied either in cold-worked condition or in cold-worked and age-hardened condition. A rise in temperature above the softening temperatures indicated for the different electrode materials will significantly lower their mechanical and physical properties. Where brazed joints are inevitable, careful consideration should be given to the likely loss of hardness in alloys of the age-hardened type and to the fact that local rises in temperature (hot spots) in non-symmetrical bodies can lead to cracking. This is why such alloys should preferably be processed by machining or cold forming - extrusion or bending. If the material is to undergo extrusion or bending, a special grade of WIRBALIT® HF, N and B types, featuring a lower hardness, are available. 





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