problems include solidification cracking, microfissuring,
modification of the weld metal composition,
and sensitization. High welding currents
will exacerbate all of these problems, so
currents should be limited to approximately 250
A maximum. Low arc voltages will help to prevent
pickup of silicon and loss of chromium,
due to reaction with the flux; the recommended
voltage is therefore approximately 26 to 28 V.
Proper flux selection is critical to success. A
highly basic, nonalloying flux is recommended.
A procedure qualification that involves chemical
analysis or corrosion testing of the weld
metal, in addition to mechanical testing, should
always be conducted when using SAW