ASTM E252-06

Standard Test Method for Thickness of Foil, Thin Sheet, and Film by Mass Measurement

ABSTRACT
This test method covers the standard procedures for the determination of the thickness of metallic foils, thin sheets, and films by measuring the mass of the specimen of known area and density. The apparatuses needed for this method are a precision blanking press for cutting specimens into circles of a specified area or diameter, and a balance for measuring its mass. The thickness shall then be calculated by using an equation that relates it with the specimen's mass, area, and density.
SCOPE
1.1 This test method covers the determination of the thickness of metallic foil and sheet 0.015 in. (0.38 mm) and less in thickness by measuring the mass of a specimen of known area and density. The test method is applicable to other sheet, foil, and film as indicated in Annex A3.
1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are mathematical conversions to SI units, which are provided for information only and are not considered standard.
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.

General Information

• Status: Historical
• Publication Date: 30-Apr-2006
• ICS: 17.040.20 - Properties of surfaces
• Technical Committee: B07 - Light Metals and Alloys
• Drafting Committee: B07.05 - Testing

Relations

• Replaces: ASTM E252-05 - Standard Test Method for Thickness of Thin Foil, Sheet, and Film by Mass Measurement
• Effective Date: 01-May-2006
• Referred By: ASTM E345-16 - Standard Test Methods of Tension Testing of Metallic Foil
• Effective Date: 01-May-2006
• Referred By: ASTM B479-19 - Standard Specification for Annealed Aluminum and Aluminum-Alloy Foil for Flexible Barrier, Food Contact, and Other Applications
• Effective Date: 01-May-2006
• Referred By: ASTM B373-19 - Standard Specification for Aluminum Foil for Capacitors
• Effective Date: 01-May-2006
• Referred By: ASTM D8136-17 - Standard Test Method for Determining Plastic Film Thickness and Thickness Variability Using a Non-Contact Capacitance Thickness Gauge
• Effective Date: 01-May-2006
• Referred By: ASTM D374/D374M-16 - Standard Test Methods for Thickness of Solid Electrical Insulation
• Effective Date: 01-May-2006

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: E252 − 06
StandardTest Method for
Thickness of Foil, Thin Sheet, and Film by Mass
1
Measurement
This standard is issued under the fixed designation E252; 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 (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope* specimens may be used with the recognition that the accuracy
stated in 6.1 is no longer applicable. See Annex A1 for the
1.1 This test method covers the determination of the thick-
selection of other specimen sizes and the resulting change in
ness of metallic foil and sheet 0.015 in. (0.38 mm) and less in
accuracy of the test method.
thickness by measuring the mass of a specimen of known area
and density. The test method is applicable to other sheet, foil, 3.2 Balance—capable of measuring to the nearest 0.1 mg of
2 2
and film as indicated in Annex A3. thickness for the 8.000-in. (51.613-cm ) circle.
1.2 The values stated in inch-pound units are to be regarded
4. Procedure
asthestandard.Thevaluesgiveninparenthesesaremathemati-
2 2
4.1 Blank an 8.000 6 0.008-in. (51.613 6 0.051-cm )
cal conversions to SI units, which are provided for information
circle representative of the foil or sheet, swab with acetone or
only and are not considered standard.
other suitable solvent to ensure a surface free of soil, and
1.3 This standard does not purport to address all of the
determine the mass of the clean, dry specimen to the nearest
safety concerns, if any, associated with its use. It is the
0.1 mg. Use a suitable solvent to remove any coating known to
responsibility of the user of this standard to establish appro- 2 2
exceed 0.005 mg/ft (4.645 mg/cm ) of surface area.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
5. Calculation
5.1 Determine the thickness from the relationship:
2. Referenced Documents
M
2.1 The following documents of the issue in effect on the
T 5
A·D
date of material purchase, unless otherwise noted, form a part
of this specification to the extent referenced herein:
where:
2
T = thickness of the foil, sheet, or film, in. (or cm),
2.2 ASTM Standards:
M = mass of the circle, g,
D1505 Test Method for Density of Plastics by the Density-
2 2
A = area of the circle, in. (or cm ), and
Gradient Technique
3 3
D = density of the foil, sheet, or film, g/in. (or Mg/m ).
E29 Practice for Using Significant Digits in Test Data to
Determine Conformance with Specifications
5.2 Densities of Aluminum Alloys:
5.2.1 Calculate the density of aluminum foil or sheet from
3. Apparatus
chemical composition limits of the alloy by the method
described in Annex A2. The densities of foil or sheet alloys
3.1 Precision Blanking Press—to cut foil or sheet circles
2 2
determined in this manner are accurate to within 6 0.3 %.
that are 8.000 6 0.008 in. (51.613 6 0.051 cm ) in area or
5.2.2 Calculated densities for some of the common foil or
3.1915 60.0015in.(81.06 60.04mm)indiameter.Othersize
sheet alloys can be found in Table 1.Acolumn headed “mils/g
2
for 8.000-in. Area” is added for convenience in determining
2 2
1
This test method is under the jurisdiction of ASTM Committee B07 on Light
thickness of the 8.000-in. (51.613-cm ) specimens. The mass
Metals and Alloysand is the direct responsibility of Subcommittee B07.05 on
of the specimen in grams multiplied by this factor is equal to
Testing.
the thickness of the foil or sheet in mils. One mil is equal to
Current edition approved May 1, 2006. Published May 2006. Originally
0.001 in. (0.0254 mm).
approved in 1964. Last previous edition approved in 2005 as E252 – 05. DOI:
10.1520/E0252-06.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 6. Precision and Bias
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
6.1 Following the procedure outlined in this test method,
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. repeatedmassmeasurementsofthesamespecimenondifferent
*A Summary of Changes section appears at the end of this standard
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1

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E252 − 06
TABLE 1 Densities of Aluminum Foil or Sheet Alloys Applicable
to the Determination of Thickness by the Mass Measurement
Method
2
Density
mils/g for 8.000-in.
Alloy
3 3A
Area
g/in. Mg/m
1100 44.41 2.71 2.815
1145 44.24 2.700 2.826
1188 44.24 2.700 2.826
1199 44.24 2.700 2.826
1235 44.33 2.705 2.820
3003 44.74 2.73 2.
...