ASTM A767/A767M-05
(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 dipping the properly prepared reinforcing bars into a molten bath of zinc.
1.2 This specification is applicable for orders in either inch-pound units (as Specification A767) or SI units (as Specification A767M).
1.3 The values stated in either SI or inch-pound units are to be regarded as standard. Within the text, the inch-pound units are shown in brackets. The values stated in each system are not exact equivalents. Therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with this specification.
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Designation: A 767/A 767M – 05
Standard Specification for
Zinc-Coated (Galvanized) Steel Bars for Concrete
1
Reinforcement
This standard is issued under the fixed designationA767/A 767M; 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 (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
3
1. Scope* 2.2 American Concrete Institute Specification:
ACI 301 Specifications for Structural Concrete
1.1 This specification covers steel reinforcing bars with
protective zinc coatings applied by dipping the properly
3. Ordering Information
prepared reinforcing bars into a molten bath of zinc.
3.1 It shall be the responsibility of the purchaser to specify
1.2 This specification is applicable for orders in either
all requirements that are necessary for material ordered to this
inch-pound units (as Specification A 767) or SI units (as
specification. Such requirements shall include, but are not
Specification A 767M).
limited to the following:
1.3 The values stated in either SI or inch-pound units are to
3.1.1 Quantity of bars,
be regarded as standard. Within the text, the inch-pound units
3.1.2 Size of bars,
are shown in brackets.The values stated in each system are not
3.1.3 Reinforcing bar specification (ASTM designation and
exact equivalents. Therefore, each system must be used inde-
year of issue) and grade,
pendentlyoftheother.Combiningvaluesfromthetwosystems
3.1.4 Class of coating,
may result in nonconformance with this specification.
3.1.5 Galvanization before or after fabrication, and
2. Referenced Documents
NOTE 1—Atypical ordering description is as follows: Deformed Grade
2
2.1 ASTM Standards: 420 bars to ASTM A 615M-____; 1600 m, No. 19, 8 m long in secured
lifts; zinc-coated (galvanized) toASTMA 767M-____; including Class 1
A 90/A 90M Test Method for Weight [Mass] of Coating
coating, and galvanization after fabrication.
Iron With Zinc or Zinc-Alloy Coating
[Deformed Grade 60 bars to ASTM A 615-____; 4000 linear ft, No. 6,
A 615/A 615M Specification for Deformed and Plain
20 ft, 0 in. long in secured lifts; zinc-coated (galvanized) to ASTM
Carbon-Steel Bars for Concrete Reinforcement
A 767-____, including Class 1 coating, and galvanization after fabrica-
A 706/A 706M Specification for Low-Alloy Steel De-
tion.]
formed and Plain Bars for Concrete Reinforcement
4. Galvanizing
A 780/A 780M Practice for Repair of Damaged and Un-
coated Areas of Hot-Dip Galvanized Coatings
4.1 Handling:
A 996/A 996M Specification for Rail-Steel and Axle-Steel
4.1.1 The galvanizer shall be permitted to subject the newly
Deformed Bars for Concrete Reinforcement
coated steel reinforcing bars to air or steam wiping to remove
B6 Specification for Zinc
excess zinc from the bars. After the wiping, the coated steel
E 376 Practice for Measuring Coating Thickness by
reinforcing bars shall meet the minimum coating mass
Magnetic-FieldorEddy-Current(Electromagnetic)Exami-
[weight].
nation Methods
NOTE 2—During the wiping process care should be taken to maintain a
uniformly thick coating around the perimeter of the bar.
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel, 4.1.2 It shall be the responsibility of the galvanizer to
Stainless Steel, and RelatedAlloys and is the direct responsibility of Subcommittee
maintain identity of the reinforcing bars throughout the galva-
A01.05 on Steel Reinforcement.
nizing process and to the point of shipment.
Current edition approved March 1, 2005. Published March 2005. Originally
4.2 Mass [Weight] of Coating and Test:
approved in 1979. Last previous edition approved in 2000 asA 767/A 767M – 00b.
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 American Concrete Institute, 38800 Country Club Dr., Farm-
the ASTM website. ington Hills, MI 48331.
*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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A 767/A 767M – 05
4.2.1 This specification includes two classes of coating averaged to obtain the coating thickness. For the stripping
mass [weight]. The mass [weight] of zinc coating based on method and the weighing method, three samples per lot shall
actual area of the bar, shall conform to the requirements shown be measured.
in Table 1.
NOTE 5—Alot shall be as follows:All bars of one size
...
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:A 767/A767M–00b Designation: A 767/A 767M – 05
Standard Specification for
Zinc-Coated (Galvanized) Steel Bars for Concrete
1
Reinforcement
This standard is issued under the fixed designationA767/A 767M; 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 Department of Defense.
1. Scope*
1.1 This specification covers steel reinforcing bars with protective zinc coatings applied by dipping the properly prepared
reinforcing bars into a molten bath of zinc.
1.2 This specification is applicable for orders in either inch-pound units (as Specification A 767) or SI units (as Specification
A 767M).
1.3 The values stated in either SI or inch-pound units are to be regarded as standard. Within the text, the inch-pound units are
shown in brackets.The values stated in each system are not exact equivalents.Therefore, each system must be used independently
of the other. Combining values from the two systems may result in nonconformance with this specification.
2. Referenced Documents
2.1 ASTM Standards:
2
A90Test Method for Weight (Mass) of Coating on ZincCoated (Galvanized) Iron or Steel Articles ASTM Standards:
A 90/A 90M Test Method for Weight [Mass] of Coating Iron With Zinc or Zinc-Alloy Coating
A 615/A 615M Specification for Deformed and Plain Billet-SteelCarbon-Steel Bars for Concrete Reinforcement
A 706/A 706M Specification for Low-Alloy Steel Deformed and Plain Bars for Concrete Reinforcement
A 780/A 780M Practice for Repair of Damaged and Uncoated Areas of Hot-Dip Galvanized Coatings
A 996/A 996M Specification for Rail-Steel and Axle-Steel Deformed Bars for Concrete Reinforcement
B6 Specification for Zinc (Slab Zinc)
E 376 Practice for Measuring Coating Thickness by Magnetic-Field or Eddy-Current (Electromagnetic) TestExamination
Methods
3
2.2 American Concrete Institute Specification:
ACI 301 Specifications for Structural Concrete
3. Ordering Information
3.1 It shall be the responsibility of the purchaser to specify all requirements that are necessary for material ordered to this
specification. Such requirements shall include, but are not limited to the following:
3.1.1 Quantity of bars,
3.1.2 Size of bars,
3.1.3 Reinforcing bar specification (ASTM designation and year of issue) and grade,
3.1.4 Class of coating,
3.1.5 Galvanization before or after fabrication, and
NOTE 1—A typical ordering description is as follows: Deformed Grade 420 bars to ASTM A 615M-____; 1600 m, No. 19, 8 m long in secured lifts;
zinc-coated (galvanized) to ASTM A 767M-____; including Class 1 coating, and galvanization after fabrication.
[Deformed Grade 60 bars toASTMA 615-____; 4000 linear ft, No. 6, 20 ft, 0 in. long in secured lifts; zinc-coated (galvanized) toASTMA 767-____,
including Class 1 coating, and galvanization after fabrication.]
1
This specification is under the jurisdiction of ASTM Committee A-1 A01 on Steel, Stainless Steel, and Related Alloys and is the direct responsibility of Subcommittee
A01.05 on Steel Reinforcement.
Current edition approved Sept. 10, 2000. Published November 2000. Originally published as A767–79. Last previous edition A767/A767M–00a.
Current edition approved March 1, 2005. Published March 2005. Originally approved in 1979. Last previous edition approved in 2000 as A 767/A 767M – 00b.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
, Vol 01.06.volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Annual Book of ASTM Standards, Vol 01.04.
3
Available from American Concrete Institute, 38800 Country Club Dr., Farmington Hills, MI 48331.
*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 ----------------------
A 767/A 767M – 05
4. Galvanizing
4.1 Handling:
4.1.1 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. After the wiping, the coated steel reinforcing bars shall meet the minimum coating mass [weight].
NOTE 2—During the wiping process care should be taken to maintain a
...
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