Product Data Sheet

Quantitative Quality Indicators (QQIs)
Test Piece Shims
QQIs are artificial flaw (notched) shims that are
attached to example parts, commonly used todemonstrate both field strength and direction
within a part.
Available in several different configurations, QQIs
are thin steel shims with etched patterns in circularand cross shapes to provide indications in alldirections.
The steel alloy and notch dimensions, as specified
in AS 5371, are designed to provide indications
when the base part is magnetized to at least 30gauss. The thin shims can conform to curved partsurfaces, and they are typically affixed to a partusing permanent adhesives.
QQIs are useful for setting up the magnetization
parameters for part-specific techniques, and canbe used to create an example part for the dailysystem performance check of the magnetizing
equipment.
They are very important for the setup and balanceof multi-directional fields, since they have circularflaws that show indications in all directions
simultaneously.
INSTRUCTIONS
Leave the hermetically-sealed package intact
until ready to use. Shims are manufactured of
low carbon steel and must be protected fromcorrosion when not in use. To prevent corrosion,
the QQIs are coated with a refined mineral baseoil and stored in the protective plastic packaging.
Prior to use, the protective coating shall be
removed from both faces of the QQI using SKC-S,
acetone, or a suitable solvent.

Revised: May 2023

The part and shim must be clean and dry before
application. Place the QQI flawside-down in
intimate contact with the part being investigatedand securely fasten it down on all four sides. To
attach the QQIs, use non-fluorescent tape (forexample, Scotch brand 191, 471 or 600 series), astrong permanent adhesive such as cyanoacrylate(Super Glue or equivalent), or the Magnaflux
supplied test shim stickers. The latter may beremoved by soaking in acetone.
Be sure that the surface opposite the flaw is notcovered and that no air gap exists between theindicator and the part. When using the indicator
as a process control part, ensure that there is noadhesive covering the indicator itself. This method
is also applicable when the indicator is left inplace in preventative maintenance applications.
Store the QQIs in solvent after use. For moredetails, please refer to ASTM E1444.

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Product Data Sheet
MULTI-DIRECTIONAL FIELDS
Multi-directional applications are determinedby setting the amperage of each direction
individually, then balancing the fields whenapplied together.

• For each field direction, slowly increase

the amperage until a visible indication isachieved.
• Demagnetize the part and clean the QQIs
between each field direction.
• In multi-directional mode, begin with theamperage settings determined individually.
To balance the fields, adjust the amperageof each direction as needed until the entire
circle of the QQI is visible.

SPECIFICATIONS• AS 5371• ASME BPVC Section V Article 7• ASTM E709
• ASTM E1444• ASTM E3024

PART NUMBERS
631590631591631592

CX-230, set of 5
CX-430, set of 5
CX4-230, set of 5

NOTE: QQIs do not hold residual fields.
Continuous magnetization methods will produce
the best results.

CX-2300.75 inch (19 mm) square shimwith circle-cross notch pattern,
0.002 inch (0.05 mm) thickness
with a notch depth of 30% ofshim thickness.

CX-4300.75 inch (19 mm) square shimwith circle-cross notch pattern,
0.004 inch (0.10 mm) thickness
with a notch depth of 30% ofshim thickness.

CX4-230

0.79 inch (20 mm) square shimwith four circle-cross notchpatterns, to be cut by user into
four separate shims. 0.002 inch(0.05 mm) thickness with a notch
depth of 30% of shim thickness.

Revised: May 2023

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