ASTM B373-19

Standard Specification for Aluminum Foil for Capacitors

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STANDARD published on 1.7.2019

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The information about the standard:

Designation standards: ASTM B373-19
Publication date standards: 1.7.2019
SKU: NS-955559
The number of pages: 6
Approximate weight : 18 g (0.04 lbs)
Country: American technical standard
Category: Technical standards ASTM

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Aluminium electrolytic capacitors

Annotation of standard text ASTM B373-19 :

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.

Keywords:
aluminum foil ,, ICS Number Code 31.060.50 (Aluminium electrolytic capacitors)

Additional information

1. 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.

2. Referenced Documents

E527-23	Standard Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)
H35.1	Alloy and Temper Designation Systems for Aluminum
E1251-17a	Standard Test Method for Analysis of Aluminum and Aluminum Alloys by Spark Atomic Emission Spectrometry (Includes all amendments and changes 10/26/2017).
B193-20	Standard Test Method for Resistivity of Electrical Conductor Materials
E607-02	Standard Test Method for Atomic Emission Spectrometric Analysis Aluminum Alloys by the Point to Plane Technique Nitrogen Atmosphere
E716-16(2021)e2	Standard Practices for Sampling and Sample Preparation of Aluminum and Aluminum Alloys for Determination of Chemical Composition by Spark Atomic Emission Spectrometry (Includes all amendments and changes 9/7/2022).
E29-22	Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E34-11	Standard Test Methods for Chemical Analysis of Aluminum and Aluminum-Base Alloys
E55-23	Standard Practice for Sampling Wrought Nonferrous Metals and Alloys for Determination of Chemical Composition
E227-90(1996)	Standard Test Method for Optical Emission Spectrometric Analysis of Aluminum and Aluminum Alloys by the Point-to-Plane Technique (Withdrawn 2002)
E252-06(2021)e1	Standard Test Method for Thickness of Foil, Thin Sheet, and Film by Mass Measurement (Includes all amendments and changes 7/6/2023).
E345-24	Standard Test Methods of Tension Testing of Metallic Foil

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