ASTM F2329-13
(Specification)Standard Specification for Zinc Coating, Hot-Dip, Requirements for Application to Carbon and Alloy Steel Bolts, Screws, Washers, Nuts, and Special Threaded Fasteners
Standard Specification for Zinc Coating, Hot-Dip, Requirements for Application to Carbon and Alloy Steel Bolts, Screws, Washers, Nuts, and Special Threaded Fasteners
ABSTRACT
This specification covers the requirements for hot-dip zinc coating applied to carbon steel and alloy steel bolts, screws, washers, nuts, and special threaded fasteners applied by the hot-dip coating process. The zinc used for the coating shall conform to the chemical composition required. The following tests shall be made to ensure that the zinc coating is being furnished in accordance with this specification: coating thickness; finish and appearance; embrittlement test; and adhesion test.
SCOPE
1.1 This specification covers the requirements for hot-dip zinc coating applied to carbon steel and alloy steel bolts, screws, washers, nuts, and special threaded fasteners. It also provides for minor coating repairs. Nails and rivets are not included in this specification.
1.2 It is intended to be applicable to fasteners that are centrifuged or otherwise handled to remove excess galvanizing bath metal (free zinc).
1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the 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 and health practices and determine the applicability of regulatory limitations prior to use.
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Designation:F2329 −13
StandardSpecification for
Zinc Coating, Hot-Dip, Requirements for Application to
Carbon and Alloy Steel Bolts, Screws, Washers, Nuts, and
1
Special Threaded Fasteners
This standard is issued under the fixed designation F2329; 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* B487 Test Method for Measurement of Metal and Oxide
Coating Thickness by Microscopical Examination of
1.1 This specification covers the requirements for hot-dip
Cross Section
zinc coating applied to carbon steel and alloy steel bolts,
E376 Practice for Measuring Coating Thickness by
screws, washers, nuts, and special threaded fasteners. It also
Magnetic-Field or Eddy-Current (Electromagnetic) Test-
provides for minor coating repairs. Nails and rivets are not
ing Methods
included in this specification.
F606 Test Methods for Determining the Mechanical Proper-
1.2 It is intended to be applicable to fasteners that are
ties of Externally and Internally Threaded Fasteners,
centrifuged or otherwise handled to remove excess galvanizing
Washers, Direct Tension Indicators, and Rivets
bath metal (free zinc).
F606M Test Methods for Determining the Mechanical Prop-
1.3 The values stated in either SI units or inch-pound units
erties of Externally and Internally Threaded Fasteners,
are to be regarded separately as standard. The values stated in
Washers, and Rivets (Metric)
each system may not be exact equivalents; therefore, each
F1470 Practice for Fastener Sampling for Specified Me-
system shall be used independently of the other. Combining
chanical Properties and Performance Inspection
values from the two systems may result in non-conformance
F1789 Terminology for F16 Mechanical Fasteners
with the standard.
1.4 This standard does not purport to address all of the
3. Terminology
safety concerns, if any, associated with its use. It is the
3.1 Definitions:
responsibility of the user of this standard to establish appro-
3.1.1 Terms used in this specification are defined in Termi-
priate safety and health practices and determine the applica-
nology F1789 unless otherwise defined in this specification.
bility of regulatory limitations prior to use.
3.1.2 batch lot—quantity of identical parts cleaned, pickled,
2. Referenced Documents
fluxed, and galvanized together at one time in a galvanizing
2
basket.
2.1 ASTM Standards:
A153/A153M Specification for Zinc Coating (Hot-Dip) on
3.1.3 galvanizing—hot-dip zinc coating.
Iron and Steel Hardware
3.1.4 high temperature galvanizing—galvanizing process
A563 Specification for Carbon and Alloy Steel Nuts
carried out in a ceramic vessel (kettle) at an approximate
A563M Specification for Carbon andAlloy Steel Nuts (Met-
temperature ranging between 990°F and 1040°F [530°C and
ric)
560°C].
A780 Practice for Repair of Damaged and Uncoated Areas
of Hot-Dip Galvanized Coatings
3.1.5 hot-dip zinc coating of mechanical fasteners—process
whereby fasteners are zinc coated by immersion in a bath of
molten zinc, resulting in the formation of the iron/zinc alloy
1
This specification is under the jurisdiction of ASTM Committee F16 on
coating and a zinc coating at the surface of the fastener. This
Fasteners and is the direct responsibility of Subcommittee F16.03 on Coatings on
process involves the removal of excess zinc by spinning the
Fasteners.
Current edition approved June 1, 2013. Published June 2013. Originally
parts in a centrifuge, or brushing the threaded portion, or
approved in 2005. Last previous edition approved in 2011 as F2329-11. DOI:
handling otherwise to remove the excess zinc.
10.1520/F2329-13.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
3.1.6 production lot—batches of parts originating from the
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
same manufacturing lot, processed continuously through
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. cleaning, pickling, fluxing, dipping in molten zinc and spun in
*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
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F2329−13
a centrifuge, or other means, without any significant change in small parts shall be air cooled, as needed, in order to prevent
time, temperature, and concentration of the constituents of the the formation of zinc oxide.
process. 5.3.2 Parts, which cannot be spun shall be brushed or
handled otherwise to remove the excess zinc.
3.1.7 stress r
...
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: F2329 − 11 F2329 − 13
Standard Specification for
Zinc Coating, Hot-Dip, Requirements for Application to
Carbon and Alloy Steel Bolts, Screws, Washers, Nuts, and
1
Special Threaded Fasteners
This standard is issued under the fixed designation F2329; 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 Scope*
1.1 This specification covers the requirements for hot-dip zinc coating applied to carbon steel and alloy steel bolts, screws,
washers, nuts, and special threaded fasteners applied by the hot-dip coating process.fasteners. It also provides for minor coating
repairs. Nails and rivets are not included in this specification.
1.2 It is intended to be applicable to fasteners that are centrifuged or otherwise handled to remove excess galvanizing bath metal
(free zinc).
1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the
two systems may result in non-conformance with the 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 and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
A153/A153M Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware
A563 Specification for Carbon and Alloy Steel Nuts
A563M Specification for Carbon and Alloy Steel Nuts (Metric)
A780 Practice for Repair of Damaged and Uncoated Areas of Hot-Dip Galvanized Coatings
B487 Test Method for Measurement of Metal and Oxide Coating Thickness by Microscopical Examination of Cross Section
E376 Practice for Measuring Coating Thickness by Magnetic-Field or Eddy-Current (Electromagnetic) Testing Methods
F606 Test Methods for Determining the Mechanical Properties of Externally and Internally Threaded Fasteners, Washers, Direct
Tension Indicators, and Rivets
F606M Test Methods for Determining the Mechanical Properties of Externally and Internally Threaded Fasteners, Washers, and
Rivets (Metric)
F1470 Practice for Fastener Sampling for Specified Mechanical Properties and Performance Inspection
F1789 Terminology for F16 Mechanical Fasteners
3. Terminology
3.1 Definitions:
3.1.1 Terms used in this specification are defined in Terminology F1789 unless otherwise defined in this specification.
3.1.2 batch lot—quantity of identical parts cleaned, pickled, fluxed, and galvanized together at one time in a galvanizing basket.
3.1.3 galvanizing—hot-dip zinc coating.
3.1.4 high temperature galvanizing—galvanizing process carried out in a ceramic vessel (kettle) at an approximate temperature
ranging between 990°F and 1040°F [530°C and 560°C].
1
This specification is under the jurisdiction of ASTM Committee F16 on Fasteners and is the direct responsibility of Subcommittee F16.03 on Coatings on Fasteners.
Current edition approved Dec. 1, 2011June 1, 2013. Published December 2011June 2013. Originally approved in 2005. Last previous edition approved in 2011 as
F2329-05(2011).F2329-11. DOI: 10.1520/F2329-11.10.1520/F2329-13.
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 ----------------------
F2329 − 13
3.1.5 hot-dip zinc coating of mechanical fasteners—process whereby fasteners are zinc coated by immersion in a bath of molten
zinc, resulting in the formation of the iron/zinc alloy coating and a zinc coating at the surface of the fastener. This process involves
the removal of excess zinc by spinning the parts in a centrifuge, or brushing the threaded portion, or handling otherwise to remove
the excess zinc.
3.1.6 production lot—batches of parts originating from the same manufacturing lot, processed continuously through cleaning,
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