September 6, 2013
Fischer has developed the hand-held FERITSCOPE® FMP30 instrument, which measures the ferrite content of duplex steel weld seams using the magnetic induction method and displays it either as percent ferrite content or as a WRC (Welding Research Council) ferrite number.
With duplex steel, the ferrite content in the HAZ can deviate from the target values, either because of unsuitable filler materials or through incorrect heat input or cooling during the welding. Only on-site spot measurements can provide assurance that the processing did not change the ferrite content at the expense of crucial mechanical or corrosion-resistance properties.
The device can be outfitted with a variety of probes in special shapes such as axial, angled, or for measuring inside center holes.