Company Profile & Product Details
Fischer FERITSCOPE® FMP30 is used for the measurement of the Delta Ferrite Content in Austenitic and Duplex Steel in the range in from 0.1 to 80 % Fe (or 0.1 to 110 FN) according to the magnetic induction method as per the Basler- Standard and DIN EN ISO 17655. Areas of application:-
1. Onsite measurements, e. g. of austenitic plating as well as weld seams in stainless steel pipes, containers, boilers or other products made of austenitic or duplex steel.
2. Duplex steel is used increasingly in the chemical
and petrochemical industries, e. g., for boilers and
pipelines. A ferrite deficit in the weld seam area leads
to strength reduction, an excess ferrite content to a
reduction in toughness and ductility.
3. In particular when welding duplex steel, the ferrite
content in the welding area can easily assume unfavorable values either due to unsuitable welding filler materials or through poor heat input or heat removal. Only an onsite measurement can provide the assurance that the processing did not change the optimum ferrite content in an unfavorable manner at
the expense of mechanical or corrosion-resistance
properties.
4. Other ferritic portions like strain-induced Martensite can be measured.
5. A specific advantage of the magnetic induction method for measuring the ferrite content is that a sigma phase, i. e., a Fe-Cr precipitation, which has formed due to excess ferrite content and unfavorable cooling conditions, for example, is recognized correctly as a non-ferritic structural component. In comparison,
erroneous interpretation of ferrite content is likely in
a metallographic section where a sigma phase is not
easily distinguished from a ferritic structure.
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