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ASTM B373-19

(Specification)

Standard Specification for Aluminum Foil for Capacitors

Standard Specification for Aluminum Foil for Capacitors

ABSTRACT
This specification covers nine thicknesses of annealed aluminum foil for use in manufacture of capacitors and includes UNS alloy designations A91145 and A91235. Foil to be used as anodes in electrolytic capacitors is beyond the scope of this specification. Requirements for quality assurance, chemical analysis, and tensile breaking load test are detailed. The foil shall conform to the chemical composition requirements prescribed for aluminum, silicon and iron, copper, manganese, magnesium, zinc, vanadium, and titanium, and shall meet the specified requirements for tensile breaking load, direct current electrical resistance, and area per unit weight. The foil shall be supplied with the finish bright on one side and matte on the other, in the dry or slick condition (dry annealed A, dry annealed B, dry annealed C, or slick annealed) and shall be tested for surface condition by water or water-alcohol test. Spooling requirements such as roll dimensions, roll winding, and roll covering are given. Foil splices shall be either welded or knurled and shall be free of splits, slivers, wrinkles, ragged edges, or excessive pinholes.
SCOPE
1.1 This specification covers nine thicknesses (0.00017 to 0.00050 in. (0.0043 to 0.0127 mm)) of annealed aluminum foil used in the manufacture of capacitors.  
1.2 Foil to be used as anodes in electrolytic capacitors is beyond the scope of this specification.  
1.3 Alloy designations are in accordance with ANSI H35.11/H35.1(M). The equivalent Unified Numbering System alloy designations are those of Table 1 preceded by A9, for example, A91145 for Aluminum 1145 in accordance with Practice E527.  
1.4 For acceptance criteria for inclusion of new aluminum and aluminum alloys in this specification, see Annex A1.  
1.5 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.  
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

Status
Published
Publication Date
30-Jun-2019
ICS
31.060.50 - Aluminium electrolytic capacitors
Technical Committee
B07 - Light Metals and Alloys
Drafting Committee
B07.03 - Aluminum Alloy Wrought Products
Current Stage
Ref Project

Relations

Refers
ASTM E345-16 - Standard Test Methods of Tension Testing of Metallic Foil
Effective Date
15-Jul-2016
Refers
ASTM B985-12(2016) - Standard Practice for Sampling Aluminum Ingots, Billets, Castings and Finished or Semi-Finished Wrought Aluminum Products for Compositional Analysis
Effective Date
01-Nov-2016
Refers
ASTM E3061-17 - Standard Test Method for Analysis of Aluminum and Aluminum Alloys by Inductively Coupled Plasma Atomic Emission Spectrometry (Performance Based Method)
Effective Date
15-Jan-2017
Refers
ASTM E1251-17 - Standard Test Method for Analysis of Aluminum and Aluminum Alloys by Spark Atomic Emission Spectrometry
Effective Date
15-Sep-2017
Refers
ASTM E1251-17a - Standard Test Method for Analysis of Aluminum and Aluminum Alloys by Spark Atomic Emission Spectrometry
Effective Date
01-Oct-2017
Refers
ASTM B881-17 - Standard Terminology Relating to Aluminum- and Magnesium-Alloy Products
Effective Date
01-Nov-2017
Refers
ASTM B193-16 - Standard Test Method for Resistivity of Electrical Conductor Materials
Effective Date
01-Apr-2016

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ASTM B373-19 - Standard Specification for Aluminum Foil for CapacitorsASTM B373-19 - Standard Specification for Aluminum Foil for Capacitors
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ASTM B373-19 - Standard Specification for Aluminum Foil for Capacitors
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:B373 −19
Standard Specification for
1
Aluminum Foil for Capacitors
This standard is issued under the fixed designation B373; 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.
1. Scope B881 Terminology Relating toAluminum- and Magnesium-
Alloy Products
1.1 This specification covers nine thicknesses (0.00017 to
B985 Practice for SamplingAluminum Ingots, Billets, Cast-
0.00050 in. (0.0043 to 0.0127 mm)) of annealed aluminum foil
ings and Finished or Semi-Finished Wrought Aluminum
used in the manufacture of capacitors.
Products for Compositional Analysis
1.2 Foil to be used as anodes in electrolytic capacitors is
E29 Practice for Using Significant Digits in Test Data to
beyond the scope of this specification.
Determine Conformance with Specifications
E252 Test Method for Thickness of Foil, Thin Sheet, and
1.3 Alloy designations are in accordance with ANSI
H35.11/H35.1(M). The equivalent Unified Numbering System Film by Mass Measurement
E345 Test Methods of Tension Testing of Metallic Foil
alloy designations are those of Table 1 preceded by A9, for
example, A91145 for Aluminum 1145 in accordance with E527 Practice for Numbering Metals and Alloys in the
Unified Numbering System (UNS)
Practice E527.
E607 Test Method for Atomic Emission Spectrometric
1.4 For acceptance criteria for inclusion of new aluminum
Analysis Aluminum Alloys by the Point to Plane Tech-
and aluminum alloys in this specification, see Annex A1.
3
nique Nitrogen Atmosphere (Withdrawn 2011)
1.5 The values stated in inch-pound units are to be regarded
E716 Practices for Sampling and Sample Preparation of
as the standard. The values given in parentheses are for
Aluminum and Aluminum Alloys for Determination of
information only.
Chemical Composition by Spark Atomic Emission Spec-
1.6 This international standard was developed in accor- trometry
dance with internationally recognized principles on standard- E1251 Test Method for Analysis of Aluminum and Alumi-
ization established in the Decision on Principles for the num Alloys by Spark Atomic Emission Spectrometry
Development of International Standards, Guides and Recom- E3061 Test Method for Analysis of Aluminum and Alumi-
mendations issued by the World Trade Organization Technical numAlloys by Inductively Coupled PlasmaAtomic Emis-
Barriers to Trade (TBT) Committee. sion Spectrometry (Performance Based Method)
2.3 ANSI Standard:
2. Referenced Documents
H35.1/H35.1(M) AlloyandTemperDesignationSystemsfor
4
2.1 The following documents of the issue in effect on the Aluminum
date of material purchase form a part of this specification to the
2.4 Other Standards:
extent referenced herein.
CEN EN 14242 Aluminum and aluminum alloys. Chemical
2
analysis. Inductively coupled plasma optical emission
2.2 ASTM Standards:
5
spectral analysis
B193 Test Method for Resistivity of Electrical Conductor
Materials
3. Terminology
B666/B666M Practice for Identification Marking of Alumi-
num and Magnesium Products 3.1 Definitions:
3.1.1 Refer to Terminology B881 for definitions of product
terms used in this specification.
1
This specification is under the jurisdiction of ASTM Committee B07 on Light
3.2 Definitions of Terms Specific to This Standard:
Metals and Alloys and is the direct responsibility of Subcommittee B07.03 on
Aluminum Alloy Wrought Products.
Current edition approved July 1, 2019. Published July 2019. Originally approved
3
in 1961. Last previous edition approved in 2006 as B373 – 00 (2006) which was The last approved version of this historical standard is referenced on
withdrawn January 2015 and reinstated in July 2019. DOI: 10.1520/B0373-19. www.astm.org.
2 4
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available from Aluminum Association, Inc., 1400 Crystal Drive Suite 430,
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Arlington, VA 22202. http://www.aluminum.org.
5
Standards volume information, refer to the standard’s Document Summary page on Available from European Committee for Standardization, Central Secretariat
the ASTM website. (CEN), rue de Stassart 36, B1050 Brussels, Belgium. www.cen.eu.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
B373−19
A,B,C,F
TABLE 1 Chemical Requirements
D
Aluminum Silicon Other Elements
Copper Manganese Magnesium Zinc Vanadium Titani
...

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Standard Test Method for Airborne Asbestos Concentration in Ambient and Indoor Atmospheres as Determined by Transmission Electron Microscopy Direct Transfer (TEM)

SIGNIFICANCE AND USE
5.1 This test method is applicable to the measurement of airborne asbestos in a wide range of ambient air situations and for detailed evaluation of any atmosphere for asbestos structures. Most fibers in ambient atmospheres are not asbestos, and therefore, there is a requirement for fibers to be identified. Most of the airborne asbestos fibers in ambient atmospheres have diameters below the resolution limit of the light microscope. This test method is based on transmission electron microscopy, which has adequate resolution to allow detection of small thin fibers and is currently the only technique capable of unequivocal identification of the majority of individual fibers of asbestos. Asbestos is often found, not as single fibers, but as very complex, aggregated structures, which may or may not also be aggregated with other particles. The fibers found suspended in an ambient atmosphere can often be identified unequivocally if sufficient measurement effort is expended. However, if each fiber were to be identified in this way, the analysis would become prohibitively expensive. Because of instrumental deficiencies or because of the nature of the particulate matter, some fibers cannot be positively identified as asbestos even though the measurements all indicate that they could be asbestos. Therefore, subjective factors contribute to this measurement, and consequently, a very precise definition of the procedure for identification and enumeration of asbestos fibers is required. The method defined in this test method is designed to provide a description of the nature, numerical concentration, and sizes of asbestos-containing particles found in an air sample. The test method is necessarily complex because the structures observed are frequently very complex. The method of data recording specified in the test method is designed to allow reevaluation of the structure-counting data as new applications for measurements are developed. All of the feasible specimen preparation techn...
SCOPE
1.1 This test method2 is an analytical procedure using transmission electron microscopy (TEM) for the determination of the concentration of asbestos structures in ambient atmospheres and includes measurement of the dimension of structures and of the asbestos fibers found in the structures from which aspect ratios are calculated.  
1.1.1 This test method allows determination of the type(s) of asbestos fibers present.  
1.1.2 This test method cannot always discriminate between individual fibers of the asbestos and non-asbestos analogues of the same amphibole mineral.  
1.2 This test method is suitable for determination of asbestos in both ambient (outdoor) and building atmospheres.  
1.2.1 This test method is defined for polycarbonate capillary-pore filters or cellulose ester (either mixed esters of cellulose or cellulose nitrate) filters through which a known volume of air has been drawn and for blank filters.  
1.3 The upper range of concentrations that can be determined by this test method is 7000 s/mm2. The air concentration represented by this value is a function of the volume of air sampled.  
1.3.1 There is no lower limit to the dimensions of asbestos fibers that can be detected. In practice, microscopists vary in their ability to detect very small asbestos fibers. Therefore, a minimum length of 0.5 μm has been defined as the shortest fiber to be incorporated in the reported results.  
1.4 The direct analytical method cannot be used if the general particulate matter loading of the sample collection filter as analyzed exceeds approximately 10 % coverage of the collection filter by particulate matter.  
1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.6 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 appropri...

  • Standard
    33 pages
    English language
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  • Standard
    33 pages
    English language
    sale 15% off