ASTM E1606-99
(Practice)Standard Practice for Electromagnetic (Eddy-Current) Examination of Copper Redraw Rod for Electrical Purposes
Standard Practice for Electromagnetic (Eddy-Current) Examination of Copper Redraw Rod for Electrical Purposes
SCOPE
1.1 This practice covers the procedures that shall be followed in electromagnetic (eddy-current) examination of copper redraw rods for detecting discontinuities or imperfections of a severity likely to cause failure or markedly impair surface quality of the rod. These procedures are applicable for continuous lengths of redraw rod in diameters from 1/4 to 1 3/8 in. (6.4 to 35 mm) suitable for further fabrication into electrical conductors.
1.2 This practice covers redraw rod made from tough-pitch or oxygen-free coppers.
1.3 The procedures described in this practice are based on methods for making use of stationary encircling annular test coil systems.
1.4 The values stated in inch-pound units are to be regarded as the standard. The SI equivalents of inch-pound units may be approximate.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Designation: E 1606 – 99
Standard Practice for
Electromagnetic (Eddy-Current) Examination of Copper
Redraw Rod for Electrical Purposes
This standard is issued under the fixed designation E 1606; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 2.3 AIA Standard:
NAS 410 Certification and Qualification of Nondestructive
1.1 This practice covers the procedures that shall be fol-
Testing Personnel
lowed in electromagnetic (eddy-current) examination of copper
redraw rods for detecting discontinuities or imperfections of a
3. Terminology
severity likely to cause failure or markedly impair surface
3.1 Definitions—Standard terminology relating to electro-
quality of the rod. These procedures are applicable for con-
magnetic (eddy-current) examination may be found in Termi-
1 3
tinuous lengths of redraw rod in diameters from ⁄4 to 1 ⁄8 in.
nology E 1316, Section C, Electromagnetic Testing.
(6.4 to 35 mm) suitable for further fabrication into electrical
conductors.
4. Summary of Practice
1.2 This practice covers redraw rod made from tough-pitch
4.1 Examination is performed by passing the rod lengthwise
or oxygen-free coppers.
through a coil energized with alternating current at a fixed
1.3 The procedures described in this practice are based on
frequency. The electrical impedance of the coil is affected by
methods for making use of stationary encircling annular test
rod vibrations, rod dimensions, electrical conductivity of the
coil systems.
rod material, and metallurgical or mechanical discontinuities in
1.4 The values stated in inch-pound units are to be regarded
the rod surface. During passage of the rod, the changes in
as the standard. The SI equivalents of inch-pound units may be
impedance caused by these variables in the rod produce
approximate.
electrical signals that are processed so as to actuate an audio,
1.5 This standard does not purport to address all of the
visual, or electrical signaling device or mechanical marker that
safety concerns, if any, associated with its use. It is the
produces a record.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
5. Significance and Use
bility of regulatory limitations prior to use.
5.1 Eddy-current examination is a nondestructive method of
locating surface discontinuities in a product. Signals can be
2. Referenced Documents
produced by discontinuities located on the surface of the rod.
2.1 ASTM Standards:
Since the density of eddy-currents decreases nearly exponen-
E 543 Practice for Agencies Performing Nondestructive
2 tially as the distance from the surface increases, deep-seated
Testing
defects may be undetected.
E 1316 Terminology for Nondestructive Examination
5.2 Some indications obtained by this practice may not be
2.2 ASNT Standards:
relevant to product quality. For example, a signal may be
SNT-TC-1A Recommended Practice for Personnel Qualifi-
3 caused by minute flaws or irregularities, by anomalies in the
cation and Certification in Nondestructive Testing
material, or by other factors such as operator error, or a
ANSI/ASNT-CP-189 Standard for Qualification and Certi-
3 combination thereof, that are not detrimental to the end use of
fication of Nondestructive Testing Personnel
the product. Nonrelevant indications can mask unacceptable
discontinuities. On the other hand, relevant indications are
those that may result from nonacceptable discontinuities and
This practice is under the jurisdiction of ASTM Committee E-7 on Nonde-
structive Testing and is the direct responsibility of Subcommittee E07.07 on
should be determined by agreement between the user and the
Electromagnetic Method.
supplier. Any indication that is believed to be irrelevant shall
Current edition approved Sept. 10, 1999. Published November 1999. Originally
published as E 1606–94. Last previous edition E 1606–94.
Annual Book of ASTM Standards, Vol 03.03.
3 4
Available from American Society for Nondestructive Testing, 1711 Arlingate Available from the Aerospace Inductries Association of America., Inc., 1250
Plaza, P.O. Box 28518, Columbus, OH 43228–0518. Eye Street, N.W., Washington, DC 20005.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
E1606–99
be regarded as unacceptable until it is demonstrated by distortion or mechanical damage of the rod while drilling. The
reexamination or other means to be nonrelevant. diameter of the drilled hole shall be 0.025 in. (0.635 mm) and
shall not vary by more than 6 0.001 in. (6 0.025 mm). The
6. Basis of Application depth shall be 0.075 in. (1.90 mm) and shall not vary more than
6 0.003 in. (6 0.076 mm).
6.1 Personnel Qualification—If specified in the contractual
8.1.2.2 Round Bottom Transverse Notch— The notch shall
agreement, personnel performing examinations to this practice
be made using a suitable jig with a 0.250-in. (6.35-mm)
shall be qualified in accordance with a nationally recognized
diameter No. 4 cut, straight, round file. The rod surface shall be
nondestructive testing (NDT) personnel qualification practice
stroked in a substantially straight line perpendicular to its
or standard, such as ANSI/ASNT-CP-189, SNT-TC-1A, NAS-
longitudinal axis. The notch depth shall be 0.010 in. (0.25 mm)
410, or a similar document and certified by the employer or
and shall not vary from the prescribed depth by more than 6
certifying agency, as applicable. The practice or standard used
0.001 in. (6 0.025 mm) when measured at the center of the
and its applicable revision shall be identified in the contractual
notch.
agreement between the using parties.
8.1.2.3 The straightness of the sample should not vary more
6.2 Qualification of Nondestructive Agencies—If specified
than6 0.015 in. (6 0.38 mm) over a 12-in. (305-mm) length.
in the contractual agreement, NDT agencies shall be qualified
8.1.2.4 Diameter variations between the test sample and any
and evaluated as described in Practice E 543. The applicable
other replacements should not vary more than 6 0.015 in. (6
edition of Practice E 543 shall be specified in the contractual
0.381 mm) of the diameter of the test sample being replaced,
agreement.
that is, between 1.1 and 6 % variation.
8.1.2.5 Other Artificial Discontinuities— Discontinuities of
7. Apparatus
other contours may be used in the calibration standard by
7.1 Electronic Apparatus, capable of energizing the test coil
mutual agreement between the supplier and the purchaser.
with alternating currents of suitable frequencies (for example,
8.1.2.6 Electrical discharge machinery (EDM) can be used
in the range from 1 kHz to 1 MHz), and capable of sensing the
as an alternative to drilling holes or filing the notch, but the
changes in the electrical impedance of the coils. Electrical
same dimension tolerances must be adapted.
signals produced in this manner are processed so as t
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