iTeh StandardsiTeh Standards
EURUSD
Your shopping cart is empty.
ASTM

ASTM B664-90(2006)

(Specification)

Standard Specification for 80 % Silver-20 % Graphite Sliding Contact Material

Standard Specification for 80 % Silver-20 % Graphite Sliding Contact Material

ABSTRACT
This specification defines the criteria for composition and other requirements for sliding contact materials or brushes with a nominal composition by weight of 20% silver and 80% graphite. Materials shall adhere to specified requirements for chemical composition, density, shear strength, and microstructure. They shall also conform to typical values of Rockwell superficial hardness and specific resistance.
SCOPE
1.1 This specification defines the criteria for composition and other requirements for brushes with a nominal silver content of 80 %, by weight, with the balance being substantially graphite.
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 will 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
31-May-2006
ICS
77.120.99 - Other non-ferrous metals and their alloys
Technical Committee
B02 - Nonferrous Metals and Alloys
Drafting Committee
B02.05 - Precious Metals and Electrical Contact Materials and Test Methods
Current Stage
Ref Project

Relations

Replaces
ASTM B664-90(2000) - Standard Specification for 80% Silver-20% Graphite Sliding Contact Material
Effective Date
01-Jun-2006
Replaced By
ASTM B664-90(2012) - Standard Specification for 80 % Silver-20 % Graphite Sliding Contact Material
Effective Date
01-May-2012

Buy Standard

ASTM B664-90(2006) - Standard Specification for 80 % Silver-20 % Graphite Sliding Contact MaterialASTM B664-90(2006) - Standard Specification for 80 % Silver-20 % Graphite Sliding Contact Material
PreviousNext
Technical specification
ASTM B664-90(2006) - Standard Specification for 80 % Silver-20 % Graphite Sliding Contact Material
English language
2 pages
sale 15% off
Preview
sale 15% off
Preview

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: B664 – 90 (Reapproved 2006)
Standard Specification for
80 % Silver-20 % Graphite Sliding Contact Material
This standard is issued under the fixed designation B664; 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 3.2.1 Density—The minimum acceptable density shall be
5.15 g/cm as determined by the measurement and weight
1.1 This specification defines the criteria for composition
method defined by ANSI C64.1.
and other requirements for brushes with a nominal silver
3.2.2 Shear Strength:
content of 80%, by weight, with the balance being substan-
3.2.2.1 The shear strength for the normal and transverse
tially graphite.
directions shall be measured for rectangular parallelepipeds
1.2 This standard does not purport to address all of the
and shall be 2000 psi (14 MPa), minimum.
safety concerns, if any, associated with its use. It is the
3.2.2.2 The shear strength for the longitudinal shear direc-
responsibility of the user of this standard to become familiar
tion shall be measured for cylinders and shall be 1000 psi (6.9
will all hazards including those identified in the appropriate
MPa), minimum.
Material Safety Data Sheet (MSDS) for this product/material
3.3 Microstructure—Partsshallbevisuallyfreeofstructural
as provided by the manufacturer, to establish appropriate
defects, cracks, etc., upon examination at 503. The press
safety and health practices, and determine the applicability of
direction, as evidenced by laminations, shall be as defined by
regulatory limitations prior to use.
the purchase order. Also the brush material shall not contain
2. Referenced Documents
abrasive particles that will sliver a metal alloy ring with a
hardness$110 HK whenthebrushforceisequalto30gor
10 0
2.1 ASTM Standards:
that necessary for 5.0 psi (34 kPa) pressure, whichever is
B613 Guide for Preparing Specifications for Miniature
greater. A sliver is defined as a loose wear particle with one
Brushes of Composite Materials for Sliding Electric Con-
dimension$503 the next smaller dimension. Although sliv-
tacts
ering can be caused by coarse abrasive particles, other param-
E18 Test Methods for Rockwell Hardness of Metallic Ma-
eters can contribute to slivering (for example, very high brush
terials
force).
2.2 ANSI Standard:
3.4 Sourceorgradeofrawmaterials(forexample,graphite)
C64.1 Brushes for Electrical Machines
or methods of manufacture shall not be changed without
3. Requirements
notifying users.
3.1 Chemical Composition, shall be as follows:
4. Reference Properties
Silver 80 6 3 % (weight)
4.1 Because of their size, the following properties for
Graphite balance
Total metal impurities 1 % max
miniature brushes cannot always be determined; however,
Per
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.

This May Also Interest You

ASTM
ASTM B541-24(Specification)
Standard Specification for Gold Electrical Contact Alloy

ABSTRACT
This specification covers a gold-rich, age-hardenable alloy in rod, wire, and strip form applicable to electrical contacts. The material shall be finished by cold working, annealing, turning, grinding, and age hardening. The materials shall conform to the specified chemical composition requirements. Tensile strength, elongation, and hardness shall be determined by tension and hardness tests. Chemical analysis shall be done by spectrochemical or wet analysis methods.
SCOPE
1.1 This specification covers a gold-rich, age-hardenable alloy in rod, wire, and strip form applicable to electrical contacts.  
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.3 The following precautionary statement pertains to the test method portion only, Section 8, of this specification. 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 Safety Data Sheet (SDS) for this product/material as provided by the manufacturer, to establish appropriate safety, health, and environmental practices, and determine the applicability of regulatory limitations prior to use.  
1.4 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.

  • Technical specification
    4 pages
    English language
    sale 15% off
  • Technical specification
    4 pages
    English language
    sale 15% off
ASTM
ASTM B277-18(2024)(Test Method)
Standard Test Method for Hardness of Electrical Contact Materials

SIGNIFICANCE AND USE
3.1 The Rockwell hardness and Rockwell superficial tests are useful when the test specimens are sufficiently thick (in relation to the indentor load) to ensure that the results are not affected by the flow of metal on the surface of the anvil. On a solid piece the flow of metal on the under surface may be detected by a bulge or marking. On composite pieces where the contact materials are attached to backings of a different material, the thickness limitations imposed for a solid piece shall apply to the contact material portion of such composite pieces.
Note 1: As a matter of information, it may be stated that tests on fine silver showed that on annealed samples having a Rockwell 15T hardness of 27, the readings were not affected on thicknesses 1/16 in. (1.6 mm) or over. On thicknesses of 1/32 in. (0.8 mm) Rockwell 15T scale readings of 72 and higher were not affected.  
3.2 The microindentation hardness test is of questionable significance when the metallic phases in a material are so large that the indentation does not represent an accurate average hardness. Sintered contact materials usually contain segregates differing greatly in hardness from the matrix hardness and may destroy the validity of microindentation hardness readings.  
3.3 Other aspects of significance and use shall be as described in the particular ASTM test method used, as listed in Section 2.
SCOPE
1.1 This test method covers the determination of the hardness of metallic materials used for electrical contacts. Rockwell, Rockwell superficial, Brinell, and microindentation hardness tests are included, along with information on the limitations and use of these tests.  
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.3 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 will all hazards including those identified in the appropriate Safety Data Sheet (SDS) for this product/material as provided by the manufacturer, to establish appropriate safety, health, and environmental practices, and determine the applicability of regulatory limitations prior to use.  
1.4 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.

  • Standard
    2 pages
    English language
    sale 15% off
ASTM
ASTM B561-23(Specification)
Standard Specification for Refined  Platinum

ABSTRACT
This specification covers refined platinum as sponge, cast bar, and wrought forms in two grades as follows: Grade 99.95 and Grade 99.99. The refined platinum shall conform to the required chemical composition for platinum, rhodium, palladium, ruthenium, iridium, gold, silver, lead, tin, zinc, iron, manganese, copper, silicon, calcium, magnesium, aluminum, nickel, chromium, antimony, arsenic, bismuth, tellurium, cadmium, and molybdenum. The metal may be produced by refining process that yields a product capable of meeting the chemical requirements of this specification.
SCOPE
1.1 This specification covers refined platinum as sponge, cast bar, and wrought forms (Note 1) in two grades as follows:  
1.1.1 Grade 99.95 (UNS PO4995)—Platinum having a purity of 99.95 %, min, and  
1.1.2 Grade 99.99—Platinum having a purity of 99.99 % min.  
Note 1: Other forms of unfabricated platinum of commerce are not to be excluded under this specification.
Note 2: For the purposes of determining conformance with this specification, an observed value obtained from analysis shall be rounded to the nearest unit in the last right hand place of figures used in expressing the limiting value, in accordance with the rounding off method of Practice E29.  
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.3 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 Safety Data Sheet (SDS) for this product/material as provided by the manufacturer, to establish appropriate safety, health, and environmental practices, and determine the applicability of regulatory limitations prior to use.  
1.4 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.

  • Technical specification
    2 pages
    English language
    sale 15% off
  • Technical specification
    2 pages
    English language
    sale 15% off
ASTM
ASTM B717-23(Specification)
Standard Specification for Refined Ruthenium

ABSTRACT
This specification covers refined ruthenium as sponge and powder in one grade as follows: Grade 99.80 and Grade 99.90. The material may be produced by any refining process that yields a product capable of meeting the chemical requirements of this specification. The material should conform to the requirements for chemical composition as prescribed.
SCOPE
1.1 This specification covers refined ruthenium as sponge and powder in one grade as follows:  
1.1.1 Grade 99.80—Ruthenium having a purity of 99.80 %.  
1.1.2 Grade 99.90—Ruthenium having a purity of 99.90 %.  
Note 1: For the purposes of determining conformance with this specification, an observed value obtained from analysis shall be rounded to the nearest unit in the last right-hand place of figures used in expressing the limiting value in accordance with the rounding method of Practice E29.  
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.3 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 Safety Data Sheet (SDS) for this product/material as provided by the manufacturer, to establish appropriate safety, health, and environmental practices, and determine the applicability of regulatory limitations prior to use.  
1.4 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.

  • Technical specification
    2 pages
    English language
    sale 15% off
  • Technical specification
    2 pages
    English language
    sale 15% off
ASTM
ASTM B616-23(Specification)
Standard Specification for Refined Rhodium

ABSTRACT
This specification covers refined rhodium as sponge and powder in three grades, namely: Grade 99.80, Grade 99.90, and Grade 99.95. The material may be produced by any refining process that will yield a product capable of meeting the chemical composition requirements specified for rhodium, platinum, iridium, palladium, ruthenium, lead, tin, zinc, arsenic, bismuth, cadmium, iron, silicon, silver, gold, copper, nickel, tellurium, magnesium, calcium, aluminum, chromium, manganese, antimony, cobalt, and boron determined by chemical analysis. Sampling requirements for the metal sponge and powder are detailed.
SCOPE
1.1 This specification covers refined rhodium as sponge and powder in three grades as follows:  
1.1.1 Grade 99.80—Rhodium having a purity of 99.80 %,  
1.1.2 Grade 99.90—Rhodium having a purity of 99.90 %, and  
1.1.3 Grade 99.95—Rhodium having a purity of 99.95 %.  
1.1.4 For the purposes of determining conformance with this specification, an observed value obtained from analysis shall be rounded to the nearest unit in the last right-hand place of figures used in expressing the limiting value, in accordance with the rounding method of Practice E29.  
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.3 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 Safety Data Sheet (SDS) for this product/material as provided by the manufacturer, to establish appropriate safety, health, and environmental practices, and determine the applicability of regulatory limitations prior to use.  
1.4 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.

  • Technical specification
    2 pages
    English language
    sale 15% off
  • Technical specification
    2 pages
    English language
    sale 15% off
ASTM
ASTM B692-18(2023)(Specification)
Standard Specification for 75 % Silver-25 % Graphite Sliding Contact Material

ABSTRACT
This specification defines the criteria for the chemical composition and other requirements (including physical properties, microstructure, superficial hardness, and specific resistance ) for silver-graphite brushes for sliding electrical contacts. The percentage of silver, graphite, ash in graphite, and total metal impurities are prescribed. The minimum acceptable values for the physical properties such as density, determined by measurement and weight method, and shear strength are given. Typical Rockwell hardness and specific resistance for the material are also specified.
SCOPE
1.1 This specification defines the criteria for composition and other requirements for brushes with a nominal silver content of 75 weight % with the balance being substantially graphite.  
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.3 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 Safety Data Sheet (SDS) for this product/material as provided by the manufacturer, to establish appropriate safety, health, and environmental practices, and determine the applicability of regulatory limitations prior to use.  
1.4 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.

  • Technical specification
    2 pages
    English language
    sale 15% off
ASTM
ASTM B664-18(2023)(Specification)
Standard Specification for 80 % Silver-20 % Graphite Sliding Contact Material

ABSTRACT
This specification defines the criteria for composition and other requirements for sliding contact materials or brushes with a nominal composition by weight of 20% silver and 80% graphite. Materials shall adhere to specified requirements for chemical composition, density, shear strength, and microstructure. They shall also conform to typical values of Rockwell superficial hardness and specific resistance.
SCOPE
1.1 This specification defines the criteria for composition and other requirements for brushes with a nominal silver content of 80 %, by weight, with the balance being substantially graphite.  
1.2 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard.  
1.3 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 will all hazards including those identified in the appropriate Safety Data Sheet (SDS) for this product/material as provided by the manufacturer, to establish appropriate safety, health, and environmental practices, and determine the applicability of regulatory limitations prior to use.  
1.4 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.

  • Technical specification
    2 pages
    English language
    sale 15% off
ASTM
ASTM B563-01(2022)(Specification)
Standard Specification for Palladium-Silver-Copper Electrical Contact Alloy

ABSTRACT
This specification covers an alloy containing palladium, silver, copper, platinum, and nickel in the form of wire, rod, and strip for electrical contacts. The materials shall be processed by cold working, heat treating, annealing, turning, grinding, and pickling. The material shall conform to the required chemical composition of palladium, silver, copper, platinum, and nickel. The alloys shall conform to the required mechanical properties such as tensile strength, elongation, Knoop hardness, and Vickers hardness.
SCOPE
1.1 This specification covers an alloy containing palladium, silver, copper, platinum, and nickel in the form of wire, rod, and strip for electrical contacts.  
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.3 The following precautionary statement pertains to the test method portion only, Section 7, of this specification: 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 Safety Data Sheet (SDS) for this product/material as provided by the manufacturer, to establish appropriate safety, health, and environmental practices, and determine the applicability of regulatory limitations prior to use.  
1.4 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.

  • Technical specification
    3 pages
    English language
    sale 15% off
ASTM
ASTM B684/B684M-22(Specification)
Standard Specification for Platinum-Iridium Electrical Contact Materials

ABSTRACT
This specification covers two platinum-iridium alloys in the form of rod, wire, strip, and sheet material for electrical contacts. Raw materials shall be of such quality and purity that the finished product (produced by cold working, annealing, turning, grinding, or pickling as required) will have the properties and characteristics prescribed in this specification. The alloys shall meet the requirements of chemical composition specified for platinum, iridium, total impurities, total platinum group (palladium, rhodium, osmium, ruthenium, and gold), total other impurities (including lead, antimony, bismuth, tin, arsenic, cadmium, zinc, and iron) and other elements. Ultimate tensile strength, elongation, microhardness (Knoop or Vickers), hardness (Rockwell or Rockwell Superficial), or a combination of these mechanical properties may be specified as criterion for temper designation. Annealed and work hardened wire and strip shall conform to the mechanical requirements prescribed for ultimate tensile strength, elongation, and microhardness. Knoop hardness test, tension test, and chemical analysis using spectrochemical or wet analysis method shall be performed.
SCOPE
1.1 This specification covers an 80 % platinum—20 % iridium alloy, an 85 % platinum—15 % iridium alloy, and a 90 % platinum—10 % iridium alloy, in the form of rod, wire, strip, and sheet material for electrical contacts.  
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.  
1.3 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 Safety Data Sheet (SDS) for this product/material as provided by the manufacturer, to establish appropriate safety, health, and environmental practices, and determine the applicability of regulatory limitations prior to use.  
1.4 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.

  • Technical specification
    3 pages
    English language
    sale 15% off
  • Technical specification
    3 pages
    English language
    sale 15% off
ASTM
ASTM B693-17(2022)(Specification)
Standard Specification for Silver-Nickel Electrical Contact Materials

ABSTRACT
This specification covers electrical contact components made from silver-nickel by powder metallurgical procedures. This covers compositions within the silver-nickel system normally specified by users of electrical contacts. Chemical analysis shall be performed to evaluate material conformance to specified composition requirements. A representative sample of chips may be obtained by milling, drilling, or crushing with dry tools, (without lubrication). In order to obtain free chips, the parts selected for testing shall have the oil extracted, if necessary. Physical tests including microstructure shall be performed on a representative number of specimens.
SIGNIFICANCE AND USE
9.1 Proprietary methods for manufacture of these materials vary significantly among suppliers and these methods influence such properties as arc erosion, contact resistance, and the tendency to weld in service. Since the performance of contacts in a device depends on numerous factors outside the contact itself (opening speed, closing speed, contact pressure, contact bounce, environmental variations, assembly technique and variations, etc.), this specification cannot ensure performance control in the application. As part of the qualification on initial samples, it is recommended that the user functionally test the materials electrically for all devices applicable to the material's use. This specification provides a means for the contact manufacturer and contact user to reach agreement on the details of material to be supplied for a specific use and reasonable assurance that future lots will be similar in properties and microstructure to the initial test or sample contact supplied.
SCOPE
1.1 This specification covers electrical contact components made from silver nickel by powder metallurgical procedures.  
1.2 This specification covers compositions within the silver-nickel system normally specified by users of electrical contacts.  
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.4 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 Safety Data Sheet (SDS) for this product/material as provided by the manufacturer, to establish appropriate safety, health, and environmental practices, and determine the applicability of regulatory limitations prior to use.  
1.5 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.

  • Technical specification
    3 pages
    English language
    sale 15% off