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ASTM B695-21

(Specification)

Standard Specification for Coatings of Zinc Mechanically Deposited on Iron and Steel

Standard Specification for Coatings of Zinc Mechanically Deposited on Iron and Steel

ABSTRACT
This specification covers the requirements for zinc coatings that are mechanically deposited on iron or steel basis metals. The zinc coatings are classified according to thickness and identified into two types; as coated without supplementary treatments or with colored chromate conversion treatment. The thickest coating classes are usually referred to as "mechanically galvanized". All deposited coatings should have a bright uniform silvery appearance, and a matte to medium-bright luster. Samples should be tested for adhesion, salt-spray corrosion resistance, appearance, thickness, and absence of hydrogen embrittlement. All tests results should comply with the given requirements.
SCOPE
1.1 This specification covers the requirements for a coating of zinc mechanically deposited on iron and steel basis metals. The coating is provided in several thicknesses up to and including 107 μm. The seven thickest classes are usually referred to as “mechanically galvanized.”  
1.2 Units—The values stated in SI units are to be regarded as the standard. The inch-pound equivalents of SI units are given for informational purposes.  
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.
Note 1: The performance of this coating complies with the requirements of Specification A153/A153M and MIL-C-81562.  
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.

General Information

Status
Published
Publication Date
31-Oct-2021
ICS
25.220.40 - Metallic coatings
Technical Committee
B08 - Metallic and Inorganic Coatings
Drafting Committee
B08.06 - Soft Metals
Current Stage
Ref Project

Relations

Refers
ASTM A194/A194M-20 - Standard Specification for Carbon Steel, Alloy Steel, and Stainless Steel Nuts for Bolts for High Pressure or High Temperature Service, or Both
Effective Date
01-May-2020

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ASTM B695-21 - Standard Specification for Coatings of Zinc Mechanically Deposited on Iron and SteelASTM B695-21 - Standard Specification for Coatings of Zinc Mechanically Deposited on Iron and Steel
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REDLINE ASTM B695-21 - Standard Specification for Coatings of Zinc Mechanically Deposited on Iron and SteelREDLINE ASTM B695-21 - Standard Specification for Coatings of Zinc Mechanically Deposited on Iron and Steel
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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:B695 −21
Standard Specification for
1
Coatings of Zinc Mechanically Deposited on Iron and Steel
This standard is issued under the fixed designation B695; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope* High Temperature Service, or Both
A563/A563MSpecificationforCarbonandAlloySteelNuts
1.1 This specification covers the requirements for a coating
(Inch and Metric)
of zinc mechanically deposited on iron and steel basis metals.
B117Practice for Operating Salt Spray (Fog) Apparatus
The coating is provided in several thicknesses up to and
B183Practice for Preparation of Low-Carbon Steel for
including 107 µm. The seven thickest classes are usually
Electroplating
referred to as “mechanically galvanized.”
B242Guide for Preparation of High-Carbon Steel for Elec-
1.2 Units—The values stated in SI units are to be regarded
troplating
as the standard. The inch-pound equivalents of SI units are
B322Guide for Cleaning Metals Prior to Electroplating
given for informational purposes.
B487Test Method for Measurement of Metal and Oxide
1.3 This standard does not purport to address all of the
Coating Thickness by Microscopical Examination of
safety concerns, if any, associated with its use. It is the Cross Section
responsibility of the user of this standard to establish appro-
B499Test Method for Measurement of CoatingThicknesses
priate safety, health, and environmental practices and deter- by the Magnetic Method: Nonmagnetic Coatings on
mine the applicability of regulatory limitations prior to use.
Magnetic Basis Metals
B571Practice for Qualitative Adhesion Testing of Metallic
NOTE 1—The performance of this coating complies with the require-
Coatings
ments of Specification A153/A153M and MIL-C-81562.
B602Guide for Attribute Sampling of Metallic and Inor-
1.4 This international standard was developed in accor-
ganic Coatings
dance with internationally recognized principles on standard-
B697Guide for Selection of Sampling Plans for Inspection
ization established in the Decision on Principles for the
of Electrodeposited Metallic and Inorganic Coatings
Development of International Standards, Guides and Recom-
B762GuideofVariablesSamplingofMetallicandInorganic
mendations issued by the World Trade Organization Technical
Coatings
Barriers to Trade (TBT) Committee.
F1470Practice for Fastener Sampling for Specified Me-
chanical Properties and Performance Inspection
2. Referenced Documents
F3125/F3125MSpecification for High Strength Structural
2
2.1 ASTM Standards:
BoltsandAssemblies,SteelandAlloySteel,HeatTreated,
A153/A153MSpecification for Zinc Coating (Hot-Dip) on
Inch Dimensions 120 ksi and 150 ksi Minimum Tensile
Iron and Steel Hardware
Strength,andMetricDimensions830MPaand1040MPa
A194/A194MSpecification for Carbon Steel, Alloy Steel,
Minimum Tensile Strength
and Stainless Steel Nuts for Bolts for High Pressure or
3
2.2 Military Standard:
MIL-C-81562Coating, Cadmium, Tin Cadmium and Zinc
1
This specification is under the jurisdiction of ASTM Committee B08 on (Mechanically Deposited)
Metallic and Inorganic Coatings and is the direct responsibility of Subcommittee
B08.06 on Soft Metals.
3. Classification
Current edition approved Nov. 1, 2021. Published November 2021. Originally
3.1 Classes—Zinc coatings are classified on the basis of
approvedin1982.Lastpreviouseditionapprovedin2016asB695–04(2016).DOI:
10.1520/B0695-21.
thickness, as follows:
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
3
Standards volume information, refer to the standard’s Document Summary page on Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
the ASTM website. Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
B695−21
6.2.1 Stress-Relief Treatment—All steel parts that have an
Class Minimum Thickness, µm
110 107
ultimate tensile strength of 1000 MPa and above and that
80 81
contain tensile stresses caused by machining, grinding,
70 69
straightening, or cold-forming operation shall be given a
65 66
55 53
stress-relief heat treatment prior to
...

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: B695 − 04 (Reapproved 2016) B695 − 21
Standard Specification for
1
Coatings of Zinc Mechanically Deposited on Iron and Steel
This standard is issued under the fixed designation B695; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope Scope*
1.1 This specification covers the requirements for a coating of zinc mechanically deposited on iron and steel basis metals. The
coating is provided in several thicknesses up to and including 107 μm. The seven thickest classes are usually referred to as
“mechanically galvanized.”
1.2 Units—The values stated in SI units are to be regarded as the standard. The inch-pound equivalents of SI units are given for
informational purposes.
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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
NOTE 1—The performance of this coating complies with the requirements of Specification A153/A153M and MIL-C-81562.
1.3 The values stated in SI units are to be regarded as the standard. The inch-pound equivalents of SI units are given for
informational purposes.
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.
2. Referenced Documents
2
2.1 ASTM Standards:
A153/A153M Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware
A194/A194M Specification for Carbon Steel, Alloy Steel, and Stainless Steel Nuts for Bolts for High Pressure or High
Temperature Service, or Both
3
A325 Specification for Structural Bolts, Steel, Heat Treated, 120/105 ksi Minimum Tensile Strength (Withdrawn 2016)
3
A490 Specification for Structural Bolts, Alloy Steel, Heat Treated, 150 ksi Minimum Tensile Strength (Withdrawn 2016)
A563A563/A563M Specification for Carbon and Alloy Steel Nuts (Metric) A0563_A0563M (Inch and Metric)
B117 Practice for Operating Salt Spray (Fog) Apparatus
B183 Practice for Preparation of Low-Carbon Steel 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 B08.06 on Soft
Metals.
Current edition approved Nov. 1, 2016Nov. 1, 2021. Published November 2016November 2021. Originally approved in 1982. Last previous edition approved in 20092016
as B695B695 – 04– 04(2009).(2016). DOI: 10.1520/B0695-04R16.10.1520/B0695-21.
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.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
B695 − 21
B242 Guide for Preparation of High-Carbon Steel for Electroplating
B322 Guide for Cleaning Metals Prior to 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
B571 Practice for Qualitative Adhesion Testing of Metallic Coatings
B602 Guide for Attribute Sampling of Metallic and Inorganic Coatings
B697 Guide for Selection of Sampling Plans for Inspection of Electrodeposited Metallic and Inorganic Coatings
B762 Guide of Variables Sampling of Metallic and Inorganic Coatings
F1470 Practice for Fastener Sampling for Specified Mechanical Properties and Performance Inspection
F3125/F3125M Specification for High Strength Structural Bolts and Assemblies, Steel and Alloy Steel, Heat Treated, Inch
Dimensions 120 ksi and 150 ksi Minimum Tensile Strength, and Metric Dimensions 830 MPa an
...

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SCOPE
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SCOPE
1.1 This specification covers the requirements for a coating of cadmium mechanically deposited on metal products. The coating is provided in various thicknesses up to and including 12 μm.  
1.2 Mechanical deposition greatly reduces the risk of hydrogen embrittlement and is suitable for coating bores and recesses in many parts that cannot be conveniently electroplated (see Appendix X3).  
1.3 Cadmium coatings are usually applied to provide engineering properties and corrosion resistance. The performance of a cadmium coating depends largely on its thickness and the kind of environment to which it is exposed. Without proof of satisfactory correlation, accelerated tests such as the salt spray (fog) test cannot be relied upon to predict performance in other environments, nor will these serve as comparative measures of the corrosion resistance afforded by coatings of different metals. Thus, although there is a marked superiority of cadmium coatings over zinc coatings of equal thickness in the salt spray test, this is often not the case under conditions of use, so that further testing in the service environment should be conducted.  
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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.  
1.7 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 B633-23(Specification)
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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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.

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  • Technical specification
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