ASTM A767/A767M-19
(Specification)Standard Specification for Zinc-Coated (Galvanized) Steel Bars for Concrete Reinforcement
Standard Specification for Zinc-Coated (Galvanized) Steel Bars for Concrete Reinforcement
ABSTRACT
This specification covers steel reinforcing bars with protective zinc coatings applied by dipping the properly prepared reinforcing bars into a molten bath of zinc. Galvanization shall be used to prepare reinforcing bars. The galvanizer shall be permitted to subject the newly coated steel reinforcing bars to air or steam wiping to remove excess zinc from the bars. The mass of zinc coating shall conform to specified requirements. The mass of the coating shall be determined by magnetic thickness gage measurements. Stripping method, weighing before and after galvanizing, and microscopy method shall be used to referee the results obtained by magnetic thickness measurements. A retest shall be provided if the average zinc coating mass fails to meet the requirements. The galvanized coating shall be chromate treated.
SCOPE
1.1 This specification covers steel reinforcing bars with protective zinc coatings applied by immersing the properly prepared reinforcing bars into a molten bath of zinc.
Note 1: The galvanizer is identified throughout this specification as the manufacturer.
1.2 Guidelines for construction practices at the job-site are presented in Appendix X1.
1.3 Guidelines for use of zinc-coated (galvanized) reinforcing bars with non-galvanized steel forms are presented in Appendix X2.
1.4 The text of this specification references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables) shall not be considered as requirements of the specification.
1.5 This specification is applicable for orders in either inch-pound units (as Specification A767) or SI units (as Specification A767M).
1.6 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. 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 this specification.
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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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: A767/A767M −19
Standard Specification for
Zinc-Coated (Galvanized) Steel Bars for Concrete
1
Reinforcement
This standard is issued under the fixed designationA767/A767M; 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* 2. Referenced Documents
2
2.1 ASTM Standards:
1.1 This specification covers steel reinforcing bars with
A90/A90MTest Method for Weight [Mass] of Coating on
protective zinc coatings applied by immersing the properly
Iron and Steel Articles with Zinc or Zinc-Alloy Coatings
prepared reinforcing bars into a molten bath of zinc.
A615/A615MSpecificationforDeformedandPlainCarbon-
NOTE 1—The galvanizer is identified throughout this specification as
Steel Bars for Concrete Reinforcement
the manufacturer.
A706/A706MSpecification for Deformed and Plain Low-
1.2 Guidelines for construction practices at the job-site are
Alloy Steel Bars for Concrete Reinforcement
presented in Appendix X1.
A780/A780MPracticeforRepairofDamagedandUncoated
Areas of Hot-Dip Galvanized Coatings
1.3 Guidelines for use of zinc-coated (galvanized) reinforc-
A996/A996MSpecification for Rail-Steel and Axle-Steel
ing bars with non-galvanized steel forms are presented in
Deformed Bars for Concrete Reinforcement
Appendix X2.
B6Specification for Zinc
1.4 The text of this specification references notes and
B487Test Method for Measurement of Metal and Oxide
footnotes which provide explanatory material.These notes and
Coating Thickness by Microscopical Examination of
footnotes (excluding those in tables) shall not be considered as
Cross Section
requirements of the specification.
E376 Practice for Measuring Coating Thickness by
Magnetic-Field or Eddy Current (Electromagnetic) Test-
1.5 This specification is applicable for orders in either
ing Methods
inch-pound units (as Specification A767) or SI units (as
3
Specification A767M). 2.2 ACI Standard:
ACI301Specifications for Structural Concrete
1.6 The values stated in either inch-pound units or SI units
4
2.3 AWS Standard:
are to be regarded separately as standard. Within the text, the
AWSD1.4⁄D1.4MStructural Welding Code—Reinforcing
SI units are shown in brackets. The values stated in each
Steel
system may not be exact equivalents. Therefore, each system
shall be used independently of the other. Combining values
3. Terminology
from the two systems may result in non-conformance with this
3.1 Definition of Term Specific to This Specification:
specification.
3.1.1 galvanizing, n—the process of immersing (hot-
1.7 This international standard was developed in accor-
dipping) steel in molten zinc for a sufficient time to allow a
dance with internationally recognized principles on standard-
metallurgical reaction between iron from the steel surface and
ization established in the Decision on Principles for the
the molten zinc.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical 3.1.1.1 Discussion—The reaction between steel and molten
Barriers to Trade (TBT) Committee.
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
1
This specification is under the jurisdiction ofASTM Committee A01 on Steel, Standards volume information, refer to the standard’s Document Summary page on
Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee the ASTM website.
3
A01.05 on Steel Reinforcement. Available from American Concrete Institute (ACI), 38800 Country Club Dr.,
Current edition approved May 1, 2019. Published May 2019. Originally Farmington Hills, MI 48331-3439, http://www.concrete.org.
4
approved in 1979. Last previous edition approved in 2016 as A767/A767M–16. Available from American Welding Society (AWS), 8669 NW 36 St., #130,
DOI: 10.1520/A0767_A0767M-19. Miami, FL 33166-6672, http://www.aws.org.
*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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A767/A767M − 19
zinc forms zinc/iron alloy layers that bond the coating to the 6.2 The reinforcing bars shall be coated by immersing the
steel. The galvanizer may add trace amounts of certain ele- reinforcing bars into a molten bath of zinc u
...
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: A767/A767M − 16 A767/A767M − 19
Standard Specification for
Zinc-Coated (Galvanized) Steel Bars for Concrete
1
Reinforcement
This standard is issued under the fixed designation A767/A767M; 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*
1.1 This specification covers steel reinforcing bars with protective zinc coatings applied by immersing the properly prepared
reinforcing bars into a molten bath of zinc.
NOTE 1—The galvanizer is identified throughout this specification as the manufacturer.
1.2 Guidelines for construction practices at the job-site are presented in Appendix X1.
1.3 Guidelines for use of zinc-coated (galvanized) reinforcing bars with non-galvanized steel forms are presented in Appendix
X2.
1.4 The text of this specification references notes and footnotes which provide explanatory material. These notes and footnotes
(excluding those in tables) shall not be considered as requirements of the specification.
1.5 This specification is applicable for orders in either inch-pound units (as Specification A767) or SI units (as Specification
A767M).
1.6 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units
are shown in brackets. 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 this specification.
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.
2. Referenced Documents
2
2.1 ASTM Standards:
A90/A90M Test Method for Weight [Mass] of Coating on Iron and Steel Articles with Zinc or Zinc-Alloy Coatings
A615/A615M Specification for Deformed and Plain Carbon-Steel Bars for Concrete Reinforcement
A706/A706M Specification for Deformed and Plain Low-Alloy Steel Bars for Concrete Reinforcement
A780/A780M Practice for Repair of Damaged and Uncoated Areas of Hot-Dip Galvanized Coatings
A996/A996M Specification for Rail-Steel and Axle-Steel Deformed Bars for Concrete Reinforcement
B6 Specification for Zinc
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
3
2.2 ACI Standard:
ACI 301 Specifications for Structural Concrete
4
2.3 AWS Standard:
AWS D1.4 ⁄D1.4M Structural Welding Code—Reinforcing Steel
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.05
on Steel Reinforcement.
Current edition approved Sept. 1, 2016May 1, 2019. Published September 2016May 2019. Originally approved in 1979. Last previous edition approved in 20152016 as
A767/A767M – 09 (2015).A767/A767M – 16. DOI: 10.1520/A0767_A0767M-16.10.1520/A0767_A0767M-19.
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.
3
Available from American Concrete Institute (ACI), P.O. Box 9094, Farmington Hills, MI 48333-9094, http://www.concrete.org.
4
Available from American Welding Society (AWS), 8669 NW 36 St., #130, Miami, FL 33166-6672, http://www.aws.org.
*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 ----------------------
A767/A767M − 19
3. Terminology
3.1 Definition of Term Specific to This Specification:
3.1.1 galvanizing, n—the process of immersing (hot-dipping) steel in molten zinc for a sufficient time to allow a metallurgical
reaction between iron from the steel surface and the molten zinc.
3.1.1.1 Discussion—
The reaction between steel and molten
...
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