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8/2/2019 FC final
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Quality Management System EMIRATES TECHNO CASTINGFZE-SHARJAH
& L.L.C.-AJMAN,
U.A.ETitle:Ferrite Count Measurement Ref. No. ETC / WI / Q15
Type of
document
Work Instruction Rev. No. 00 Date 16.02.2012
Page 1 of3
Revision History
Authorization Details
Rev Date Reason for revision Revised byApproved
by
00 16.02.2012 Initial Issue
Description Name Title Signature Date
Prepared By V K Pilania Metallurgist
Reviewed By Prashanth E Lab Incharge
Approved By Raja M QA Head & MR
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8/2/2019 FC final
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Quality Management System EMIRATES TECHNO CASTINGFZE-SHARJAH
& L.L.C.-AJMAN,
U.A.ETitle:Ferrite Count Measurement Ref. No. ETC / WI / Q15
Type of
document
Work Instruction Rev. No. 00 Date 16.02.2012
Page 2 of3
Scope
This procedure is aimed to measure the ferrite count (ferrite
percentage /ferrite number) in the stainless steel.
Responsibility
Test Lab In-charge / Metallurgist
Apparatus
Fischer Feritescope MP 30
Reference Materials:ASTM E 562
Procedure
A.Test Sample Analysis
1. Calibrate the instrument before initial use to measure the
ferrite content inaustenitic and duplex steel according to the
magnetic induction method.
2. The calibration should be performed with three standards of
austenitic resp.duplex steel with delta ferrite contents of approx.
10 %, 30 % and 80 % aswell as a Fe base marked in equivalent
ferrite numbers. The calibrationprocedure is outlined in the
specification manual.
3. Locate the area in the testing piece where ferrite count has
to be measured.Inspect visually for fissures, which can indicate
low ferrite levels.
4. Testing area should be polished to have a smooth and
continuous surface.
5. Select the application mode whether ferrite percentage or
ferrite number hasto be measured.
6. Bring the probe into contact with the material surface and
hold it in placeuntil an audible sound is heard. This should take
no longer than threeseconds.
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8/2/2019 FC final
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Quality Management System EMIRATES TECHNO CASTINGFZE-SHARJAH
& L.L.C.-AJMAN,
U.A.ETitle:Ferrite Count Measurement Ref. No. ETC / WI / Q15
Type of
document
Work Instruction Rev. No. 00 Date 16.02.2012
Page 3 of3
7. Record the ferrite count (FN or %) reading. Perform five
successivemeasurements in the same area by lowering the probe
perpendicular to thespecimen. Record each measurement.
8. Measurements can be downloaded via installed software to
printer andcomputer.
9. Report the statistical evaluation including minimum, maximum
and meanvalue, number of measurements, standard deviations.
10.All the measurements should be recorded minimum for three
years.
Acceptance criteria
As per ASTM Std. & Customer Specification
