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ASTM B700-08

(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 mat, 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 the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

Status
Historical
Publication Date
31-Jul-2008
ICS
25.220.40 - Metallic coatings
Technical Committee
B08 - Metallic and Inorganic Coatings
Drafting Committee
B08.04 - Precious Metal Coatings
Current Stage
Ref Project

Relations

Replaces
ASTM B700-97(2002) - Standard Specification for Electrodeposited Coatings of Silver for Engineering Use
Effective Date
01-Aug-2008

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REDLINE ASTM B700-08 - Standard Specification for Electrodeposited Coatings of Silver for Engineering UseREDLINE ASTM B700-08 - Standard Specification for Electrodeposited Coatings of Silver for Engineering Use
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REDLINE ASTM B700-08 - Standard Specification for Electrodeposited Coatings of Silver for Engineering Use
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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:B700 −08
StandardSpecification 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 B254 Practice for Preparation of and Electroplating on
Stainless Steel
1.1 This specification covers requirements for electrodepos-
B281 Practice for Preparation of Copper and Copper-Base
ited coatings of silver used for engineering purposes that may
Alloys for Electroplating and Conversion Coatings
be mat, bright, or semibright and are not less than 98 % silver
B322 Guide for Cleaning Metals Prior to Electroplating
purity.
B343 Practice for Preparation of Nickel for Electroplating
1.2 Coatings of silver covered by this specification are
with Nickel
usually employed for solderable surfaces, electrical contact
B374 Terminology Relating to Electroplating
characteristics, high electrical and thermal conductivity, ther-
B481 Practice for Preparation of Titanium and Titanium
mocompression bonding, wear resistance of load-bearing
Alloys for Electroplating
surfaces, and spectral reflectivity.
B482 Practice for Preparation of Tungsten and Tungsten
1.3 In the Appendixes important characteristics of elec- Alloys for Electroplating
trodeposited silver coatings are briefly described which must
B487 Test Method for Measurement of Metal and Oxide
be considered when used in engineering applications, namely
Coating Thickness by Microscopical Examination of
electrical conductivity (see Appendix X1), silver migration
Cross Section
(see Appendix X2), thickness (see Appendix X3), hardness
B499 Test Method for Measurement of Coating Thicknesses
(see Appendix X4), and atmospheric tarnish (see Appendix
by the Magnetic Method: Nonmagnetic Coatings on
X5).
Magnetic Basis Metals
B504 Test Method for Measurement of Thickness of Metal-
1.4 The following hazards caveat pertains only to the test
lic Coatings by the Coulometric Method
methods section of this specification: This standard does not
B507 Practice for Design of Articles to Be Electroplated on
purport to address the safety concerns, if any, associated with
Racks
its use. It is the responsibility of the user of this standard to
B542 Terminology Relating to Electrical Contacts and Their
establish appropriate safety and health practices and deter-
Use
mine the applicability of regulatory limitations prior to use.
B567 Test Method for Measurement of Coating Thickness
2. Referenced Documents
by the Beta Backscatter Method
2
2.1 ASTM Standards: B568 Test Method for Measurement of Coating Thickness
B183 Practice for Preparation of Low-Carbon Steel for
by X-Ray Spectrometry
Electroplating B571 Practice for Qualitative Adhesion Testing of Metallic
B242 Guide for Preparation of High-Carbon Steel for Elec-
Coatings
troplating B578 Test Method for Microhardness of Electroplated Coat-
B252 Guide for Preparation of Zinc Alloy Die Castings for
ings
Electroplating and Conversion Coatings B579 Specification for Electrodeposited Coatings of Tin-
B253 Guide for Preparation of Aluminum Alloys for Elec-
Lead Alloy (Solder Plate)
troplating
B602 Test Method for Attribute Sampling of Metallic and
Inorganic Coatings
1
This specification is under the jurisdiction of ASTM Committee B08 on
B678 Test Method for Solderability of Metallic-Coated
Metallic and Inorganic Coatings and is the direct responsibility of Subcommittee
Products
B08.04 on Precious Metal Coatings.
B697 Guide for Selection of Sampling Plans for Inspection
Current edition approved Aug. 1, 2008. Published September 2008. Originally
of Electrodeposited Metallic and Inorganic Coatings
approvedin1981.Lastpreviouseditionapprovedin2002asB700 – 97(2002).DOI:
10.1520/B0700-08.
B762 Test Method of Variables Sampling of Metallic and
2
B08 For referenced ASTM standards, visit the ASTM website, www.astm.org,
Inorganic Coatings
orcontactASTMCustomerServiceatservice@astm.org.For Annual Book ofASTM
B849 Specification for Pre-Treatments of Iron or Steel for
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. Reducing Risk of Hydrogen Embrittlement
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
B700−08
NOTE 1—Metallic or organic brighteners used for grain refinement may
B850 GuideforPost-CoatingTreatmentsofSteelforReduc-
be present in the electrodeposit so long as they do not interfere with the
ing the Risk of Hydrogen Embrittlement
stated function of the coating and a
...

This document is not anASTM standard and is intended only to provide the user of anASTM 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:B700–97 (Reapproved 2002) Designation: B 700 – 08
Standard Specification for
1
Electrodeposited Coatings of Silver for Engineering Use
This standard is issued under the fixed designation B 700; 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 Thisspecificationcoversrequirementsforelectrodepositedcoatingsofsilverusedforengineeringpurposesthatmaybemat,
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,highelectricalandthermalconductivity,thermocompressionbonding,wearresistanceofload-bearingsurfaces,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 the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish
appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
B 183 Practice for Preparation of Low-Carbon Steel for Electroplating
B 242Practice Guide for Preparation of High-Carbon Steel for Electroplating
B 252 Guide for Preparation of Zinc Alloy Die Castings for Electroplating and Conversion Coatings
B 253 Guide for Preparation of Aluminum Alloys for Electroplating
B 254 Practice for Preparation of and Electroplating on Stainless Steel
B 281 Practice for Preparation of Copper and Copper-Base Alloys for Electroplating and Conversion Coatings
B 322Practice Guide for Cleaning Metals Prior to Electroplating
B 343 Practice for Preparation of Nickel for Electroplating with Nickel
B 374 Terminology Relating to Electroplating
B 481 Practice for Preparation of Titanium and Titanium Alloys for Electroplating
B 482 Practice for Preparation of Tungsten and Tungsten Alloys for Electroplating
B 487 Test Method for Measurement of Metal and Oxide Coating ThicknessesThickness by Microscopical Examination of a
Cross Section
B 499 Test Method for Measurement of Coating Thicknesses by the Magnetic Method: Nonmagnetic Coatings on Magnetic
Basis Metals
B 504 Test Method for Measurement of Thickness of Metallic Coatings by the Coulometric Method
B 507 Practice for Design of Articles to beBe Electroplated on Racks
B 542 Terminology Relating to Electrical Contacts and Their Use
B 567 Test Method for Measurement of Coating Thickness by the Beta Backscatter Method
B 568 Test Method for Measurement of Coating Thickness by X-Ray Spectrometry
2
B 571Test Methods for Adhesion of Metallic Coatings Practice for Qualitative Adhesion Testing of Metallic Coatings
B 578 Test Method for Microhardness of Electroplated Coatings
B 579 Specification for Electrodeposited Coatings of Tin-Lead Alloy (Solder Plate)
B 602 Test Method for Attribute Sampling of Metallic and Inorganic Coatings
B 678 Test Method for Solderability of Metallic-Coated Products
1
This specification is under the jurisdiction ofASTM Committee B08 on Metallic and Inorganic Coatings and is the direct responsibility of Subcommittee B08.08.02 on
Precious Metal Coatings.
Current edition approved May 10, 1997. Published February 1998. Originally published as B700–81. Last previous edition B700–90.
Current edition approved Aug. 1, 2008. Published September 2008. Originally approved in 1981. Last previous edition approved in 2002 as B 700 – 97(2002).
2
B08For 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 , Vol 02.05.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 ----------------------
B700–08
B 697 Guide for Selection of Sampling
...

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SCOPE
1.1 This specification covers the requirements for electroplated nickel coatings applied to metal products for engineering applications, for example, for use as a buildup for mismachined or worn parts, for electronic applications, including as underplates in contacts or interconnections, and in certain joining applications.  
1.2 Electroplating of nickel for engineering applications (Note 1) requires technical considerations significantly different from decorative applications because the following functional properties are important:  
1.2.1 Hardness, strength, and ductility,  
1.2.2 Wear resistance,  
1.2.3 Load bearing characteristics,  
1.2.4 Corrosion resistance,  
1.2.5 Heat scaling resistance,  
1.2.6 Fretting resistance, and  
1.2.7 Fatigue resistance.  
Note 1: Functional electroplated nickel coatings usually contain about 99 % nickel, and are most frequently electrodeposited from a Watts nickel bath or a nickel sulfamate bath. Typical mechanical properties of nickel electroplated from these baths, and the combined effect of bath operation and solution composition variables on the mechanical properties of the electrodeposit are given in Guide B832. When electroplated nickel is required to have higher hardnesses, greater wear resistance, certain residual stress values and certain leveling characteristics, sulfur and other substances are incorporated in the nickel deposit through the use of certain addition agents in the electroplating solution. For the effect of such additives, see Section 4 and Annex A3. Cobalt salts are sometimes added to the plating solution to produce harder nickel alloy deposits.  
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 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.

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ASTM
ASTM B489-85(2023)(Practice)
Standard Practice for Bend Test for Ductility of Electrodeposited and Autocatalytically Deposited Metal Coatings on Metals

SIGNIFICANCE AND USE
4.1 The routine measurement of the ductility of electrodeposited and autocatalytically deposited metal coatings can be useful in process control, especially when the electroplating process is used for decorative and engineering purposes.
SCOPE
1.1 This practice covers a test procedure for determining the ductility of electrodeposited and autocatalytically deposited coatings on sheet or strip basis metals. The purpose of the test is to determine the resistance of metal coatings to cracking during distortion.2  
1.2 Test Methods E8 can be used if the coatings are too ductile and require mandrels too small to be practical.  
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 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.

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