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ASTM A934/A934M-04

(Specification)

Standard Specification for Epoxy-Coated Prefabricated Steel Reinforcing Bars

Standard Specification for Epoxy-Coated Prefabricated Steel Reinforcing Bars

SCOPE
1.1 This specification covers deformed and plain steel reinforcing bars which prior to surface preparation are prefabricated and then coated with a protective fusion-bonded epoxy coating by electrostatic spray or other suitable method.
1.2 Prefabricated steel reinforcing bars coated with fusion-bonded epoxy formulations in accordance with this specification are not intended to be bent or rebent.
Note 1—Experience has shown epoxy-coated prefabricated steel reinforcing bars have limited capability to be successfully field bent or rebent (see ). If the construction project requires epoxy-coated steel reinforcing bars that must be able to sustain field bending or rebending, the use of coated bars conforming to Specification A 775/A 775M should be considered.
1.3 Organic coatings other than epoxy may be used provided they meet the requirements of this specification.
1.4 Requirements for epoxy coatings are contained in .
1.5 Guidelines for Appendix X1 application process and product test procedures of epoxy coatings for steel reinforcing bars are presented in .
1.6 Guidelines for construction practices at the job-site for coated steel reinforcing bars are presented in .
1.7 This specification is applicable for orders in either SI (metric) units (as Specification A 934M) or inch-pound units [as Specification A 934].
1.8 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 the two systems are not exact equivalents: therefore, each system must be used independently of the other. Combining values from the systems may result in nonconformance with this specification.
1.9 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.

General Information

Status
Historical
Publication Date
29-Feb-2004
ICS
77.140.15 - Steels for reinforcement of concrete
Technical Committee
A01 - Steel, Stainless Steel and Related Alloys
Drafting Committee
A01.05 - Steel Reinforcement
Current Stage
Ref Project

Relations

Replaces
ASTM A934/A934M-03 - Standard Specification for Epoxy-Coated Prefabricated Steel Reinforcing Bars
Effective Date
01-Mar-2004
Replaced By
ASTM A934/A934M-07 - Standard Specification for Epoxy-Coated Prefabricated Steel Reinforcing Bars
Effective Date
01-Sep-2007
Referred By
ASTM A884/A884M-19e1 - Standard Specification for Epoxy-Coated Steel Wire and Welded Wire Reinforcement
Effective Date
01-Mar-2004
Referred By
ASTM A1078/A1078M-22 - Standard Specification for Epoxy-Coated Steel Dowels for Concrete Pavement
Effective Date
01-Mar-2004
Referred By
ASTM C1776/C1776M-17(2022) - Standard Specification for Wet-Cast Precast Modular Retaining Wall Units
Effective Date
01-Mar-2004

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ASTM A934/A934M-04 - Standard Specification for Epoxy-Coated Prefabricated Steel Reinforcing BarsASTM A934/A934M-04 - Standard Specification for Epoxy-Coated Prefabricated Steel Reinforcing Bars
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ASTM A934/A934M-04 - Standard Specification for Epoxy-Coated Prefabricated Steel Reinforcing Bars
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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: A 934/A 934M – 04
Standard Specification for
1
Epoxy-Coated Prefabricated Steel Reinforcing Bars
ThisstandardisissuedunderthefixeddesignationA934/A934M;thenumberimmediatelyfollowingthedesignationindicatestheyear
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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope* 2. Referenced Documents
2
1.1 This specification covers deformed and plain steel 2.1 ASTM Standards:
reinforcing bars which prior to surface preparation are prefab- A 615/A 615M Specification for Deformed and Plain
ricated and then coated with a protective fusion-bonded epoxy Billet-Steel Bars for Concrete Reinforcement
coating by electrostatic spray or other suitable method. A706/A706M Specification for Low-Alloy Steel De-
1.2 Prefabricated steel reinforcing bars coated with fusion- formed and Plain Bars for Concrete Reinforcement
bonded epoxy formulations in accordance with this specifica- A775/A775M Specification for Epoxy-Coated Steel Re-
tion are not intended to be bent or rebent. inforcing Bars
A944 Test Method for Comparing Bond Strength of Steel
NOTE 1—Experience has shown epoxy-coated prefabricated steel rein-
ReinforcingBarstoConcreteUsingBeam-EndSpecimens
forcing bars have limited capability to be successfully field bent or rebent
A 996/A 996M Specification for Rail-Steel and Axle-Steel
(see 9.3.1). If the construction project requires epoxy-coated steel rein-
Deformed Bars for Concrete Reinforcement
forcing bars that must be able to sustain field bending or rebending, the
use of coated bars conforming to Specification A775/A775M should be
B117 Practice for Operating Salt Spray (Fog) Testing
considered.
Apparatus
D4060 Test Method for Abrasion Resistance of Organic
1.3 Organic coatings other than epoxy may be used pro-
Coatings by the Taber Abraser
vided they meet the requirements of this specification.
G8 Test Methods for Cathodic Disbonding of Pipeline
1.4 Requirements for epoxy coatings are contained in An-
Coatings
nex A1.
G14 Test Method for Impact Resistance of Pipeline Coat-
1.5 Guidelines for application process and product test
ings (Falling Weight Test)
procedures of epoxy coatings for steel reinforcing bars are
G20 Test Method for Chemical Resistance of Pipeline
presented in Appendix X1.
Coatings
1.6 Guidelines for construction practices at the job-site for
G42 Test Method for Cathodic Disbonding of Pipeline
coated steel reinforcing bars are presented in Appendix X2.
Coatings Subjected to Elevated Temperatures
1.7 This specification is applicable for orders in either SI
G62 Test Methods for Holiday Detection in Pipeline Coat-
(metric) units (as Specification A934M) or inch-pound units
ings
[as Specification A934].
3
2.2 NACE International Standard:
1.8 The values stated in either SI or inch-pound units are to
RP0287 Field Measurement of Surface Profile ofAbrasive
be regarded as standard. Within the text, the inch-pound units
Blast Cleaned Steel Surfaces Using a Replica Tape
areshowninbrackets.Thevaluesstatedinthetwosystemsare
4
2.3 Society for Protective Coatings Specifications:
not exact equivalents: therefore, each system must be used
SSPC-SP10 Near-White Blast Cleaning
independentlyoftheother.Combiningvaluesfromthesystems
SSPC-VIS1 Pictorial Surface Preparation Standards for
may result in nonconformance with this specification.
Painting Steel Surfaces
1.9 This standard does not purport to address all of the
SSPC-PA2 Measurement of Dry Coating Thickness with
safety concerns, if any, associated with its use. It is the
Magnetic Gages
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
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 CommitteeA01 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 NACE International, 1440 South Creek, Houston, TX 77084.
4
Current edition approved March 1, 2004. Published April 2004. Originally Available from Society for Protective Coatings, 40 24th Street, Pittsburgh, PA
approved in 1995. Last previous edition approved in 2003 as A934/A934M–03. 15222.
*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 934/A 9
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1.1 This specification covers deformed and plain low-carbon, chromium, steel bars, in cut lengths and coils for concrete reinforcement. These bars are furnished in three alloy types depending on the chromium range content. The standard sizes and dimensions of deformed bars and their number designations are given in Table 1.2  
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This specification covers uncoated, deformed, stress-relieved, and low-relaxation wire for use as prestressed tendons in concrete railroad ties. Deformed wires with nominal diameters shall be supplied in coils and shall conform to specified values of breaking strength requirements. The relaxation losses of normal stress-relieved and low-relaxation stress-relieved wires should not exceed the specified limits. The two acceptable types of deformed wire shall have specific dimensions of deformations, where the depth of indent shall be the average depth of six or more random indents measured at maximum depth. The material shall be tested on and shall conform to specified values of the following mechanical properties: breaking strength, load at 1% extension, elongation, bending, and relaxation.
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ASTM A706/A706M-22a(Specification)
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This specification covers deformed and plain low-alloy steel bars in cut lengths or coils for concrete reinforcement intended for applications. Restrictive mechanical properties and chemical composition are required for compatibility with controlled tensile property applications or to enhance weldability. The steel shall be electric-furnace, basic-oxygen, or open-hearth processed. Tension test, bend test, and one set of dimensional property tests including bar weight and spacing, height, and gap of deformations shall be made of each bar size rolled from a heat. All tests and inspection shall be made at the place of manufacture prior to shipment, unless otherwise specified, and shall be conducted so as not to interfere unnecessarily with the operation of the works. A retest shall be provided when the specimen fails to meet the strength and elongation property requirements of the specification.
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1.2 This specification provides for measurement of dimensions, tolerances from specified dimensions, and required minimum physical properties, and prescribes testing procedures to establish conformance to these requirements.  
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ASTM A934/A934M-22(Specification)
Standard Specification for Epoxy-Coated Prefabricated Steel Reinforcing Bars

ABSTRACT
This specification covers deformed and plain steel reinforcing bars. Steel samples shall be blast cleaned and shall be coated with a protective fusion-bonded epoxy coating by electrostatic spray or other suitable method. The steel specimens shall undergo deformation test, holiday checks, bending tests, and cathodic disbondment test. The steels materials shall conform to the required values of coating thickness, continuity, flexibility, adhesion.
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1.2 Prefabricated steel reinforcing bars coated with fusion-bonded epoxy powder coating in accordance with this specification are intended to be fabricated before being coated.  
1.3 Organic coatings other than epoxy may be used provided they meet the requirements of this specification.  
1.4 Requirements for epoxy coatings are contained in Annex A1.  
1.5 Requirements for patching material are contained in Annex A2 in Specification A775/A775M.  
1.6 Guidelines for application process and product test procedures of epoxy coatings for steel reinforcing bars are presented in Appendix X1.  
1.7 Guidelines for construction practices at the job-site for coated steel reinforcing bars are presented in Appendix X2.  
1.8 This specification is applicable for orders in either inch-pound units (as Specification A934) or SI [metric] units [as Specification A934M].  
1.9 The values stated in either inch-pound units or SI 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.  
1.10 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.  
1.11 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 A775/A775M-22(Specification)
Standard Specification for Epoxy-Coated Steel Reinforcing Bars

ABSTRACT
This specification covers deformed and plain steel reinforcing bars with protective epoxy coating applied by the electrostatic spray method. The surface of the steel reinforcing bars to be coated shall be cleaned by abrasive blast cleaning to near-white metal. The number and frequency of tests for coating thickness, continuity, flexibility and adhesion are specified. If the specimen for coating thickness or flexibility fails to meet the specified requirements, two retests on random samples shall be conducted for each failed test.
SCOPE
1.1 This specification covers deformed and plain steel reinforcing bars with protective epoxy coating applied by the electrostatic spray method.
Note 1: The coating applicator is identified throughout this specification as the manufacturer.  
1.2 Other organic coatings may be used provided they meet the requirements of this specification.  
1.3 Requirements for coatings are contained in Annex A1.  
1.4 Requirements for patching material are contained in Annex A2.  
1.5 Guidelines for construction practices at the job-site are presented in Appendix X1.  
1.6 This specification is applicable for orders in either inch-pound units (as Specification A775) or SI units [as Specification A775M].  
1.7 The values stated in either inch-pound units or SI 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.  
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Standard Specification for Deformed and Plain Carbon-Steel Bars for Concrete Reinforcement

ABSTRACT
This specification covers deformed and plain carbon-steel bars for concrete reinforcements in cut lengths and coils. Materials considered under this specification are available in Grades 40 [280], 60 [420] and 75 [520]. Steel samples shall be rolled from properly identified heats of mold cast or strand cast steel using electric-furnace, basic-oxygen, or open-hearth. Heat analysis shall be performed wherein steel materials shall conform to required compositions of carbon, manganese, phosphorus and sulfur. Steel specimens shall also undergo tensile tests and shall conform to required values of tensile strength, yield strength, and elongation. Steel samples shall also undergo deformation test, tension test and bend tests. Final products shall be marked by a tag.
SCOPE
1.1 This specification covers deformed and plain carbon-steel bars in cut lengths and coils for concrete reinforcement. Annex A2 of this specification covers deformed bars for use for other applications. Steel bars containing alloy additions, such as with the Association for Iron and Steel Technology and the Society of Automotive Engineers series of alloy steels, are permitted if the resulting product meets all the other requirements of this specification. The standard sizes and dimensions of deformed bars and their number designations are given in Table 1.    
1.2 Unless specified for use for other applications in Annex A2, bars are of four minimum yield strength levels: namely, 40 000 psi [280 MPa], 60 000 psi [420 MPa], 80 000 psi [550 MPa], and 100 000 psi [690 MPa], designated as Grade 40 [280], Grade 60 [420], Grade 80 [550], and Grade 100 [690], respectively.
Note 1: Grade 100 [690] reinforcing bars were introduced in this specification in 2015. In contrast to the lower grades, which have ratios of specified tensile strength to specified yield strength that range from 1.25 to 1.50, Grade 100 [690] reinforcing bars have a ratio of specified tensile strength to specified yield strength of 1.15. Users of this specification should be aware that there will, therefore, be a lower margin of safety and reduced warning of failure following yielding when Grade 100 [690] bars are used in structural members where strength is governed by the tensile strength of the reinforcement, primarily in beams and slabs. As a result of the lower specified tensile strength to specified yield strength ratio of 1.15 for Grade 100 [690], users of this specification should be aware that ACI 318 Type 1 mechanical and welded splice requirements found in many acceptance criteria of 125 % of specified yield strength requirements in tension and compression are not applicable to Grade 100 [690]. Mechanical and welded splices should meet a minimum specified tensile strength of 115 000 psi [790 MPa] for Grade 100 [690].
Note 2: Users of this specification need to be aware that consensus design codes and specifications may not recognize the use of the No. 20 [64] bar, the largest bar included in this specification. Structural members reinforced with No. 20 [64] bars may require approval of the building official or other appropriate authority and require special detailing to ensure adequate performance at service and factored loads.  
1.3 Plain bars, in sizes up to and including 21/2 in. [63.5 mm] in diameter in coils or cut lengths, when ordered shall be furnished under this specification in Grade 40 [280], Grade 60 [420], Grade 80 [550], and Grade 100 [690]. For ductility properties (elongation and bending), test provisions of the nearest smaller nominal diameter deformed bar size shall apply. Requirements providing for deformations and marking shall not be applicable.  
Note 3: Welding of the material in this specification should be approached with caution since no specific provisions have been included to enhance its weldability. When this steel is to be welded, a welding procedure suitable for the chemical composition and intended use or service should be used. T...

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ASTM
ASTM A421/A421M-21(Specification)
Standard Specification for Stress-Relieved Steel Wire for Prestressed Concrete

ABSTRACT
This specification covers two types of uncoated stress-relieved round high-carbon steel wire commonly used in prestressed linear concrete construction. These two types are the type BA used for applications in which cold-end deformation is used for anchoring purposes and type WA wire which is used for application in which the ends are anchored by wedges, no cold-end deformation of the wire is involved. Required tensile strength, yield strength, and elongation shall be evaluated using stress-relaxation test. Heat analysis shall be used to determine the percentage of specified elements especially sulfur and phosphorus to meet the required chemical composition.
SCOPE
1.1 This specification covers two types of stress-relieved round high-carbon steel wire used in prestressed concrete construction, as follows:  
1.1.1 Type BA wire is used for applications in which cold-end deformation is used for anchoring purposes (Button Anchorage), and  
1.1.2 Type WA wire is used for application in which the ends are anchored by wedges, and no cold-end deformation of the wire is involved (Wedge Anchorage).  
1.2 A supplementary requirement (S1) is provided for use where low-relaxation wire and relaxation testing for that product is required by the purchaser. The supplementary requirement applies only when specified in the purchase order or contract.  
1.3 This specification is applicable for orders in either inch-pounds units (as Specification A421) or in SI units (as Specification A421M).  
1.4 The values stated in either inch-pound 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 the specification.  
1.5 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.  
1.6 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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