FERITSCOPE® FMP30 Measurement of the Ferrite Content
in Austenitic and Duplex Steel
Coating Thickness Material Analysis Microhardness Material Testing
Measurement of the Ferrite Content
Chemical, energy and processing plants are often subject The FERITSCOPE FMP30 measures the ferrite content in
to heat, aggressive media and high pressure. These cir- austenitic and duplex steel according to the magnetic
cumstances demand steel with high corrosion and acid induction method. All magnetizable structure sections
resistance that are resilient even at high temperatures. are measured i. e., in addition to delta-ferrite also strain-
If the ferrite content is too low, then the welded material induced martensite, for example, or other ferritic phases.
is susceptible to hot-cracking, if the ferrite content is too
high, the toughness, ductility as well as the corrosion It is suited for measurements according to the Basler-
resistance of the steel are reduced. For duplex steel, a Standard and according to DIN EN ISO 17655. Areas
ferrite deficit in the area of the weld seam results in stress of application are onsite measurements, e. g. of austenitic
corrosion cracking and reduction in strength. platings as well as weld seams in stainless steel pipes,
containers, boilers or other products made of austenitic
or duplex steel.
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, whereas, an excess of ferrite content leads to
a reduction in toughness and ductility.
In particular when welding duplex steel, the ferrite con-
tent 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.
Measurement of the ferrite content
of a weld seam
2 FERITSCOPE® FMP30
Simple and quick measurements Measurement influencing factors do not significantly affect
It is easy to measure the ferrite content accurately when the FERITSCOPE FMP30. Ferrite content measurements
using the FERITSCOPE FMP30. Upon probe placement can be carried out regardless of the substrate material
on the surface of the specimen, the reading is displayed properties starting at a plating thickness of 3 mm.
automatically and stored in the instrument. The probe can
also be placed on hard to reach areas. For such applica- Corrective calibrations with customer-specific calibration
tions, the instrument features an “external start” function to standards or correction factors (included) can be used to
trigger the measurements with the push of a button. This is take influences of the specimen shape (strong curvature),
ideal for measurements in pipes, bore holes or grooves. plating and substrate thicknesses into account. The cali-
bration is always stored measurement-application specific
Finding weld seams in polished surfaces is made easy in the respective application memory.
through the “continuous display” instrument function.
When scanning the surface with the probe with this func-
tion enabled, only the continuous readings are displayed.
A change in the ferrite content reading indicates that the
weld seam has been found.
For easy ferrite content measurements along a weld seam,
the instrument offers the “continuous measurement cap-
ture” function. When scanning the weld seam with the
probe positioned, the continuous readings are captured
and stored. This provides a ferrite content profile along
the weld seam.
Determination of the ferrite content
in the weld seam area
using the FERITSCOPE FMP30
3
FERITSCOPE® FMP30
Measurement capture
• Fast measurement and data storage
• Automatic measurement acquisition upon probe
placement or through “external trigger”
• Enabled or disabled acoustic signal
• Overwriting of erroneous measurements or
previously stored readings
• Selectable tolerance limits
• Measurement data presentation as an analog bar
with display of specification limits
• Continuous display: Continuous display of the
reading when probe is placed on the specimen;
stored with externally triggered measurement
acquisition
• Outlier rejection function for the automatic elimina-
Instrument features tion of erroneous measurements
• User-friendly operation menu • Matrix measurement mode: Measurement data
• Multiple language selections storage in blocks that are set up in the application in
• Large, easy to read color display the form of a matrix. Block change manually or
• Robust housing automatically in the specified sequence
• Non-destructive measurement of the ferrite content in • Measurement data averaging: Only the mean value
a range from 0.1 to 80 % Fe or 0.1 to 110 FN of a specified number of single readings is stored
• Units of measurement switchable between WRC-FN • Automatic block creation: Number of single readings
and % Fe per block
• Automatic probe recognition • Area measurement: Continuous measurement
• Sliding cover for keypad; however, On/Off and acquisition until the probe is lifted off; only the
evaluation keys remain accessible at all times resultant mean value is stored
• Protection of settings though lockable keypad • Continuous measurement acquisition and storage with
• Battery or line operation the probe placed on the specimen
• Automatic instrument shut-down or continuous operation
4 FERITSCOPE® FMP30
Simple and convenient evaluation
of measurement data through data
transfer via Bluetooth® or cable
Data memory
• Up to 20,000 readings and 100 applications for
measurement data and application-specific calibra-
tions
• Separation of the measurement data in up to Calibration
4,000 blocks • Only one calibration required for the entire relevant
• Date and time stamp for the blocks measurement range from 0.1 to approx. 90 FN.
Adherence to the measurement accuracy specified in
Evaluation standard ANSI/AWS A4.2M/A4.2:1997
• Statistical evaluation of measurement series with • Calibration using calibration standards traceable to
mean value, standard deviation, max and min value, TWI secondary standards or customer-specific
range standards
• Computation of the process capability indices • Linking applications: Common normalization/
cp and cpk calibration of applications
• Output of characteristic variance-analytical values
• Graphical measurement presentation as a histogram
with a Gaussian bell curve
Interfaces
• USB port for data transfer to a PC or printer
• Optional Bluetooth® module, interface for wireless
data transfer to a PC (up to 10 m)
• Optional COM module, serial interface for data
transfer to a PC or printer (cable length up to 12 m)
Large, easy to read graphical display in several languages
5
Calibration and measurement method
Calibration / Standards Magnetic induction method
To obtain comparable measurement results, the instru- The FERITSCOPE FMP30 measures according to the mag-
ments must be adjusted or calibrated using standards that netic induction method. A magnetic field generated by a
can be traced to internationally recognized secondary coil begins to interact with the magnetic portions of the
standards. For this purpose, the IIW (International Institute specimen. The changes in the magnetic field induce a
of Welding, UK) developed secondary standards that voltage proportional to the ferrite content in a second coil.
have been determined by the TWI (The Welding Institute, This voltage is then evaluated. All magnetic portions in
UK) according to the method described in DIN EN ISO the otherwise non-magnetic structure are measured, i. e.,
8249 and ANSI/AWS A4.2. in addition to delta ferrite and other ferritic portions also
strain-induced martensite, for example.
Helmut Fischer offers certified calibration standard sets
that are traceable to the TWI secondary standards for A specific advantage of the magnetic induction method for
corrective and master calibrations. The standards of the measuring the ferrite content is that a sigma phase, i. e., a
Fischer calibration standard sets list in addition to the fer- Fe-Cr precipitation, which has formed due to excess ferrite
rite numbers FN also the % Fe values. content and unfavorable cooling conditions, for example,
is recognized correctly as a non-ferritic structural compo-
Influences including the shape of the part to be measured nent. In comparison, erroneous interpretation of ferrite
(strong curvature, thickness of the ferrite-containing coat- content is likely in a metallographic section where a sigma
ing, etc.) can be taken into account through corrective phase is not easily distinguished from a ferritic structure.
calibrations with customer-specific calibration standards
or through correction factors (included). The normalization
and corrective calibration are stored application-specific
in the respective application memory of the instrument.
Fischer calibration standard set
with certificate
6 FERITSCOPE® FMP30
Ordering Information
Standard content of shipment Order no
FERITSCOPE FMP30 instrument, wrist strap, case, battery set, short form operating 605-026
instructions printed, operator’s manual and USB driver on CD, interface cable FMP/PC
Probes with a measurement range 0.1 – 80 % Fe or 0.1 – 110 WRC-FN
FGAB1.3-Fe For measurements on flat and curved areas 604-264
FGABI1.3-150-Fe Ideal for measurements in pipes, 604-254
FGABI1.3-260-Fe bore holes or grooves 604-341
Insertion diameter > 9 mm
Shank length = 150 mm or 260 mm
FGABW1.3-Fe Angle probe for measurements on flat 604-337
specimens or in pipes, bore holes and
gaps
Calibration standard set
Corrective calibration standard set CAL-NS 0.3-110 FN includes standards about: 605-564
0.3, 1.5, 10, 40, 80 FN (0.3, 1.5, 10, 40, 80% Fe)
and a saturation standard 140 FN (105 Fe%)
Optional accessories Instrument upgrade
Adapter E-probe/F-socket 604-214 Bluetooth® Module FMP30/40, interface
AC adapter FMP30-40 604-290 for the wireless data transfer from
Rechargeable battery set FMP (NiMH) 604-295 the instrument to a PC (max. 10 m) 604-480
Battery charger AA/Mignon 604-335
COM Module FMP30/40, serial interface
Bluetooth® USB stick, for retrofitting
(RS232) for data transfer to a PC
the PC with Bluetooth interface 604-481
or printer (max. cable length 12 m) 604-500
Printer handheld devices FPT100 604-412
Spare parts
Wrist strap FMP 604-150
Interface cable FMP/PC 604-146
Battery set FMP (Alkaline) 604-296
Instrument case FMP 604-148
FERITSCOPE® is a registered trademark of Helmut Fischer GmbH Institut für Elektronik und Messtechnik, Sindelfingen/Germany.
Bluetooth® is a registered trademark of Bluetooth SIG, USA
7
FISCHER worldwide
Helmut Fischer GmbH Helmut Fischer AG and
Institut für Elektronik und Messtechnik Helmut Fischer Technologie AG
71069 Sindelfingen, Germany CH-6331 Hünenberg, Switzerland
ISO 17025
SCS 0136, STS 0591
IfG-Institute for Scientific Instruments GmbH Fischer Instrumentation Electronique
12489 Berlin, Germany 78180 Montigny le Bretonneux, France
Fischer Instrumentation (GB) Ltd Helmut Fischer S.R.L.
Lymington, Hampshire SO41 8JD, England 20099 Sesto San Giovanni (Milano), Italy
Fischer Technology, Inc. Fischer Instruments, S.A.
Windsor, CT 06095, USA 08018 Barcelona, Spain
Helmut Fischer S. de R.L. de C.V. Helmut Fischer Meettechniek B.V.
76230 Querétaro, QRO, Mexico 5627 GB Eindhoven, The Netherlands
Fischer do Brasil
04711-030 São Paulo, Brasil
Fischer Instrumentation (Taiwan) Co., LTD.
Taipei City 11493, Taiwan
Fischer Instruments K.K.
Saitama-ken 340-0012, Japan
Nantong Fischer Instrumentation Ltd
Shanghai 200333, P.R. China
Fischer Instrumentation (Far East) Ltd
Kwai Chung, N.T., Hong Kong
Fischer Measurement Technologies (India) Pvt. Ltd
Pune 411057, India
Fischer Instrumentation (S) Pte Ltd
Singapore 658065, Singapore
Helmut Fischer Korea Co., Ltd
Seoul City, Republic of Korea
Fischer Technology (M) SDN Bhd
47301 Petaling Jaya, Malaysia
Helmut Fischer Thailand Co., Ltd
11-15
Bangkok 10250, Thailand
Fischer Instruments Middle East FZE
P.O.Box Dubai 371100, United Arab Emirates
03/17
973-039
www.helmut-fischer.com
Coating Thickness Material Analysis Microhardness Material Testing
