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ASTM B700-20

(Specification)

Standard Specification for Electrodeposited Coatings of Silver for Engineering Use

Standard Specification for Electrodeposited Coatings of Silver for Engineering Use

ABSTRACT
This specification establishes the requirements for electrodeposited silver coatings that may be mat, bright, or semibright, and are usually employed as solderable surfaces and for their electrical contact characteristics, high electrical and thermal conductivity, thermocompression bonding, wear resistance on load-bearing surfaces, and spectral reflectivity. Coatings shall be classified into types according to minimum purity, grade according to surface appearance (bright, semibright, or mat), and class according to whether any surface treatment has been applied. Coatings shall undergo preplating operations such as stress relief treatment, strike, and underplating, as well as post-plating embrittlement relief. Coatings shall be sampled, tested, and conform accordingly to specified requirements as to nature, purity, appearance, defects, adhesion, solderability, hardness, spectral reflectance, electrical conductivity, hydrogen embrittlement relief, and thickness (measured either nondestructively by beta backscatter, X-ray spectrometry, or magnetic method, or destructively by coulometric technique or microscopical cross-sectioning procedure).
SCOPE
1.1 This specification covers requirements for electrodeposited coatings of silver used for engineering purposes that may be matt, bright, or semibright and are not less than 98 % silver purity.  
1.2 Coatings of silver covered by this specification are usually employed for solderable surfaces, electrical contact characteristics, high electrical and thermal conductivity, thermocompression bonding, wear resistance of load-bearing surfaces, and spectral reflectivity.  
1.3 In the Appendixes, important characteristics of electrodeposited silver coatings are briefly described which must be considered when used in engineering applications, namely electrical conductivity (see Appendix X1), silver migration (see Appendix X2), thickness (see Appendix X3), hardness (see Appendix X4), and atmospheric tarnish (see Appendix X5).  
1.4 The following hazards caveat pertains only to the test methods section 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 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.

General Information

Status
Published
Publication Date
31-Oct-2020
ICS
25.220.40 - Metallic coatings
Technical Committee
B08 - Metallic and Inorganic Coatings
Drafting Committee
B08.04 - Precious Metal Coatings
Current Stage
Ref Project

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ASTM B700-20 - Standard Specification for Electrodeposited Coatings of Silver for Engineering UseASTM B700-20 - Standard Specification for Electrodeposited Coatings of Silver for Engineering Use
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REDLINE ASTM B700-20 - Standard Specification for Electrodeposited Coatings of Silver for Engineering UseREDLINE ASTM B700-20 - Standard Specification for Electrodeposited Coatings of Silver for Engineering Use
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REDLINE ASTM B700-20 - Standard Specification for Electrodeposited Coatings of Silver for Engineering Use
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Standards Content (Sample)

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:B700 −20
Standard Specification for
1
Electrodeposited Coatings of Silver for Engineering Use
This standard is issued under the fixed designation B700; 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 B183 Practice for Preparation of Low-Carbon Steel for
Electroplating
1.1 This specification covers requirements for electrodepos-
B242 Guide for Preparation of High-Carbon Steel for Elec-
ited coatings of silver used for engineering purposes that may
troplating
be matt, bright, or semibright and are not less than 98 % silver
B252 Guide for Preparation of Zinc Alloy Die Castings for
purity.
Electroplating and Conversion Coatings
1.2 Coatings of silver covered by this specification are
B253 Guide for Preparation of Aluminum Alloys for Elec-
usually employed for solderable surfaces, electrical contact
troplating
characteristics, high electrical and thermal conductivity, ther-
B254 Practice for Preparation of and Electroplating on
mocompression bonding, wear resistance of load-bearing
Stainless Steel
surfaces, and spectral reflectivity.
B281 Practice for Preparation of Copper and Copper-Base
1.3 In the Appendixes, important characteristics of elec- Alloys for Electroplating and Conversion Coatings
trodeposited silver coatings are briefly described which must
B322 Guide for Cleaning Metals Prior to Electroplating
be considered when used in engineering applications, namely
B343 Practice for Preparation of Nickel for Electroplating
electrical conductivity (see Appendix X1), silver migration
with Nickel
(see Appendix X2), thickness (see Appendix X3), hardness
B374 Terminology Relating to Electroplating
(see Appendix X4), and atmospheric tarnish (see Appendix
B481 Practice for Preparation of Titanium and Titanium
X5).
Alloys for Electroplating
B482 Practice for Preparation of Tungsten and Tungsten
1.4 The following hazards caveat pertains only to the test
Alloys for Electroplating
methods section of this specification: This standard does not
B487 Test Method for Measurement of Metal and Oxide
purport to address all of the safety concerns, if any, associated
Coating Thickness by Microscopical Examination of
with its use. It is the responsibility of the user of this standard
Cross Section
to establish appropriate safety, health, and environmental
B499 Test Method for Measurement of Coating Thicknesses
practices and determine the applicability of regulatory limita-
by the Magnetic Method: Nonmagnetic Coatings on
tions prior to use.
Magnetic Basis Metals
1.5 This international standard was developed in accor-
B504 Test Method for Measurement of Thickness of Metal-
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the lic Coatings by the Coulometric Method
B507 Practice for Design of Articles to Be Electroplated on
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical Racks
B542 Terminology Relating to Electrical Contacts and Their
Barriers to Trade (TBT) Committee.
Use
2. Referenced Documents
B567 Test Method for Measurement of Coating Thickness
2
by the Beta Backscatter Method
2.1 ASTM Standards:
B568 Test Method for Measurement of Coating Thickness
by X-Ray Spectrometry
1
This specification is under the jurisdiction of ASTM Committee B08 on
B571 Practice for Qualitative Adhesion Testing of Metallic
Metallic and Inorganic Coatings and is the direct responsibility of Subcommittee
Coatings
B08.04 on Precious Metal Coatings.
B578 Test Method for Microhardness of Electroplated Coat-
Current edition approved Nov. 1, 2020. Published November 2020. Originally
ings
approvedin1981.Lastpreviouseditionapprovedin2014asB700 – 08(2014).DOI:
10.1520/B0700-20.
B579 Specification for Electrodeposited Coatings of Tin-
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Lead Alloy (Solder Plate)
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
B602 Test Method for Attribute Sampling of Metallic and
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. Inorganic Coatings
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
B700−20
B678 Test Method for Solderability of Metallic-Coated 3.2.4 underplating, v—an application of a meta
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: B700 − 08 (Reapproved 2014) B700 − 20
Standard Specification for
1
Electrodeposited Coatings of Silver for Engineering Use
This standard is issued under the fixed designation B700; 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
1.1 This specification covers requirements for electrodeposited coatings of silver used for engineering purposes that may be
mat,matt, bright, or semibright and are not less than 98 % silver purity.
1.2 Coatings of silver covered by this specification are usually employed for solderable surfaces, electrical contact characteristics,
high electrical and thermal conductivity, thermocompression bonding, wear resistance of load-bearing surfaces, and spectral
reflectivity.
1.3 In the Appendixes, important characteristics of electrodeposited silver coatings are briefly described which must be considered
when used in engineering applications, namely electrical conductivity (see Appendix X1), silver migration (see Appendix X2),
thickness (see Appendix X3), hardness (see Appendix X4), and atmospheric tarnish (see Appendix X5).
1.4 The following hazards caveat pertains only to the test methods section 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 establish
appropriate safety safety, health, and healthenvironmental 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.
2. Referenced Documents
2
2.1 ASTM Standards:
B183 Practice for Preparation of Low-Carbon Steel for Electroplating
B242 Guide for Preparation of High-Carbon Steel for Electroplating
B252 Guide for Preparation of Zinc Alloy Die Castings for Electroplating and Conversion Coatings
B253 Guide for Preparation of Aluminum Alloys for Electroplating
B254 Practice for Preparation of and Electroplating on Stainless Steel
B281 Practice for Preparation of Copper and Copper-Base Alloys for Electroplating and Conversion Coatings
B322 Guide for Cleaning Metals Prior to Electroplating
B343 Practice for Preparation of Nickel for Electroplating with Nickel
B374 Terminology Relating to Electroplating
B481 Practice for Preparation of Titanium and Titanium Alloys for Electroplating
1
This specification is under the jurisdiction of ASTM Committee B08 on Metallic and Inorganic Coatings and is the direct responsibility of Subcommittee B08.04 on
Precious Metal Coatings.
Current edition approved May 1, 2014Nov. 1, 2020. Published May 2014November 2020. Originally approved in 1981. Last previous edition approved in 20082014 as
B700 – 08.B700 – 08(2014). DOI: 10.1520/B0700-08R14.10.1520/B0700-20.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
B700 − 20
B482 Practice for Preparation of Tungsten and Tungsten Alloys for Electroplating
B487 Test Method for Measurement of Metal and Oxide Coating Thickness by Microscopical Examination of Cross Section
B499 Test Method for Measurement of Coating Thicknesses by the Magnetic Method: Nonmagnetic Coatings on Magnetic Basis
Metals
B504 Test Method for Measurement of Thickness of Metallic Coatings by the Coulometric Method
B507 Practice for Design of Articles to Be Electroplated on Racks
B542 Terminology Relating to Electrical Contacts and Their Use
B567 Test Method for Measurement of Coating Thickness by the Beta Backscatter Method
B568 Test Method for Measurement of Coating Thickness by X-Ray Spectrometry
B571 Practice for Qualitative Adhesion Testing of Metallic Coatings
B578 Test Method for Microhardness of Electroplated Coatings
B579 Specification for Electrodeposited Coati
...

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1.5 Warning—Cadmium is toxic and must not be used in a coating for articles that can come into contact with food or beverages, or for dental or other equipment that can be inserted into the mouth. Consult appropriate agencies for regulations in this connection.  
1.6 Warning—Because of the toxicity of cadmium vapors and cadmium oxide fumes, cadmium-coated articles must not be used at temperatures of 320 °C and above. They must not be welded, spot-welded, soldered, or otherwise strongly heated without adequate ventilation that will efficiently remove all toxic fumes.  
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Standard Specification for Electrodeposited Coatings of Zinc on Iron and Steel

ABSTRACT
This specification establishes the requirements for electrodeposited zinc coatings applied to iron or steel articles for corrosion protection purposes. Electrodeposited zinc-coated steel wires or sheets are not covered here. The coatings shall be provided in four standard thickness classes in the as-plated condition or with one of three types of supplementary finishes. The surfaces of the articles shall under go pre-plating basis metal cleaning, pre- and post-coating treatment for reducing the risk of hydrogen embrittlement, and reactivation and supplementary treatments. Coatings should be sampled, prepared, tested and conform accordingly to specified requirements as to appearance (luster and workmanship), thickness, adhesion, corrosion resistance, and hydrogen embrittlement.
SCOPE
1.1 This specification covers material and process requirements for electrodeposited zinc coatings applied to iron or steel articles to protect them from corrosion.  
1.2 This specification is not intended to provide the design activity with all the background needed to properly specify their zinc coating requirements. The users of Specification B633 are encouraged to review this specification in its entirety including the appendices, and access the supplementary papers, other standards, and published literature referenced herein and within other related references.  
1.3 The coatings are provided in four standard thickness classes (4.1), in the as-plated condition or with one of five types of supplementary finishes (4.2).  
1.4 High strength metals, including high strength steels having a tensile strength greater than 1700 MPa (247 ksi, 46 HRC) should not be zinc electroplated in accordance with this specification.  
1.5 It does not cover continuous processes for electrodeposited zinc coated steel wire or sheets (see Specification A591/A591M for sheets).  
1.6 For zinc electroplating of mechanical fasteners, the purchaser is encouraged to consider Specification F1941/F1941M.  
1.7 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.8 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.9 This standard has been revised to address RoHS requirements that seek to limit the exposure of workers and the public from exposure to toxic metals. Additional types V and VI have been added to permit non-chromate passivate treatments to be used in replacement of hexavalent chromium.  
1.10 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.

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  • Technical specification
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ASTM
ASTM B840-22(Specification)
Standard Specification for Electrodeposited Coatings of Zinc Cobalt Alloy Deposits

ABSTRACT
This specification covers the requirements for electrodeposited zinc cobalt alloy coatings on metals. The coating class is Class 1 and five coating types are Type a, Type b, Type c, Type d, and Type e. The metal to be plated shall be subjected to such cleaning, pickling, and electroplating procedures. Coating requirements include: substrate, nature of coating, appearance, thickness, adhesion, corrosion resistance, and pre- and post-coating treatments of iron and steel for reducing the risk of hydrogen embrittlement. Adhesion, porosity, corrosion resistance, or appearance tests shall be made.
SCOPE
1.1 This specification covers the requirements for electrodeposited zinc cobalt alloy coatings on metals.  
1.2 The following precautionary caveat 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 establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.3 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
    5 pages
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  • Technical specification
    5 pages
    English language
    sale 15% off