ASTM B613-76(2012)

Standard Guide for Preparing Specifications for Miniature Brushes of Composite Materials for Sliding Electric Contacts

ABSTRACT
This guide defines the criteria for composition, properties, and other requirements for miniature brushes of composite materials containing a matrix of one or more conducting metallic elements or alloys and one or more lubricating lamellar solids intended for sliding electric contacts. Each constituent of the material should be listed individually by weight percent including tolerances using any analytical technique while the apparent density for the material should be defined using the measurement and weight method. The resistivity; Rockwell superficial hardness, transverse strength, and shear strength; and microstructural properties such as cracks and defects should also be defined and should conform to the required electrical, mechanical, and structural properties of the brush materials.
SCOPE
1.1 This guide defines the criteria for composition, properties, and other requirements for brushes containing a matrix of one or more conducting metallic elements or alloys and one or more lubricating lamellar solids.
1.2 The resulting specification is intended for use where the size (for example, 5 by 3 by 2 mm), shape, or other factors preclude the determination of properties on specimens of the bulk material from which individual brushes are made.
1.3 The requirements recommended herein have been found to be desirable for most brush material composites. Care must be taken in preparing a specification for a pre-existing material that imposition of one or more provisions herein does not alter the material or its performance.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
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 become familiar with all hazards including those identified in the appropriate Material Safety Data Sheet (MSDS) for this product/material as provided by the manufacturer, 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-2012
• ICS: 29.100.20 - Electrical and electromechanical components
• Technical Committee: B02 - Nonferrous Metals and Alloys
• Drafting Committee: B02.05 - Precious Metals and Electrical Contact Materials and Test Methods

Relations

• Replaces: ASTM B613-76(2006) - Standard Guide for Preparing Specifications for Miniature Brushes of Composite Materials for Sliding Electric Contacts
• Effective Date: 01-May-2012
• Referred By: ASTM B664-18(2023) - Standard Specification for 80 % Silver-20 % Graphite Sliding Contact Material
• Effective Date: 01-May-2012
• Referred By: ASTM B692-18(2023) - Standard Specification for 75 % Silver-25 % Graphite Sliding Contact Material
• Effective Date: 01-May-2012

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:B613 −76(Reapproved 2012)
Standard Guide for
Preparing Specifications for Miniature Brushes of
Composite Materials for Sliding Electric Contacts
This standard is issued under the fixed designation B613; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope E18Test Methods for Rockwell Hardness of Metallic Ma-
terials
1.1 This guide defines the criteria for composition,
E384Test Method for Knoop and Vickers Hardness of
properties, and other requirements for brushes containing a
Materials
matrix of one or more conducting metallic elements or alloys
2.2 ANSI Standard:
and one or more lubricating lamellar solids.
C64.1Brushes for Electrical Machines
1.2 The resulting specification is intended for use where the
3. Requirements
size (for example, 5 by 3 by 2 mm), shape, or other factors
preclude the determination of properties on specimens of the
3.1 Composition—Each constituent should be listed indi-
bulk material from which individual brushes are made.
vidually by weight percent including tolerances if mutually
agreed upon by producer and user. Any analytical technique
1.3 Therequirementsrecommendedhereinhavebeenfound
may be used as agreed upon between the producer and user.
to be desirable for most brush material composites. Care must
be taken in preparing a specification for a pre-existing material
3.2 Density—Anapparentdensityforthematerialshouldbe
that imposition of one or more provisions herein does not alter defined. The measurement and weight method defined by
the material or its performance.
ANSI C64.1 is preferred.
1.4 The values stated in SI units are to be regarded as 3.3 Resistivity—Theresistivityshouldbedefinedforatleast
standard. No other units of measurement are included in this one axis. The procedure defined by ANSI C64.1 may need to
standard. bemodified,asagreeduponbetweentheproduceranduser,for
very small brushes.
1.5 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
3.4 Hardness—The bulk hardness of the brush material
1 1
responsibility of the user of this standard to become familiar
should be defined. Rockwell superficial hardness tests, ⁄8 or ⁄4
with all hazards including those identified in the appropriate
in.-ball, (Test Methods E18) and Knoop, 500-g load (Test
Material Safety Data Sheet (MSDS) for this product/material
Method E384) have been used.
as provided by the manufacturer, to establish appropriate
3.5 Strength—The strength of the brush material should be
safety and health practices, and determine the applicability of
defined.
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