1、Designation: A615/A615M 15a1A615/A615M 16 American Association State Highway andTransportation Officials StandardAASHTO No.: M 31Standard Specification forDeformed and Plain Carbon-Steel Bars for ConcreteReinforcement1This standard is issued under the fixed designation A615/A615M; the number immedia
2、tely following the designation indicates the yearof 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 b
3、een approved for use by agencies of the U.S. Department of Defense.1 NOTEEditorial corrections were made to Section 4 in August 2015.1. Scope*1.1 This specification covers deformed and plain carbon-steel bars in cut lengths and coils for concrete reinforcement. Steel barscontaining alloy additions,
4、such as with the Association for Iron and Steel Technology and the Society of Automotive Engineersseries of alloy steels, are permitted if the resulting product meets all the other requirements of this specification. The standard sizesand dimensions of deformed bars and their number designations are
5、 given in Table 1.1.2 Bars are of five minimum yield strength levels: namely, 40 000 psi 280 MPa, 60 000 psi 420 MPa, 75 000 psi 520 MPa,80 000 psi 550 MPa, and 100 000 psi 690 MPa, designated as Grade 40 280, Grade 60 420, Grade 75 520, Grade 80 550,and Grade 100 690, respectively.NOTE 1Grade 100 6
6、90 reinforcing bars were introduced in this specification in 2015. In contrast to the lower grades, which have ratios of specifiedtensile strength to specified yield strength that range from 1.31 to 1.5, Grade 100 690 reinforcing bars have a ratio of specified tensile strength tospecified yield stre
7、ngth of 1.15. Designers should be aware that there will, therefore, be a lower margin of safety and reduced warning of failure followingyielding when Grade 100 690 bars are used in structural members where strength is governed by the tensile strength of the reinforcement, primarilyin beams and slabs
8、. If this is of concern, the purchaser has the option of specifying a minimum ratio of tensile strength to actual yield strength. Consensusdesign codes and specifications such as “Building Code Requirements for Structural Concrete (ACI 318)” may not recognize Grade 100 690 reinforcingbars: therefore
9、 the 125 % of specified yield strength requirements in tension and compression are not applicable. Mechanical and welded splices shouldmeet a minimum specified tensile strength of 115 000 psi 790 MPa.NOTE 2Designers need to be aware that design standards do not recognize the use of the No. 20 64 bar
10、, 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 specialdetailing to ensure adequate performance at service and factored loads.1.3 Plain bars, in sizes up to and
11、 including 212 in. 63.5 mm in diameter in coils or cut lengths, when ordered shall be furnishedunder this specification in Grade 40 280, Grade 60 420, Grade 75 520, Grade 80 550, and Grade 100 690. For ductilityproperties (elongation and bending), test provisions of the nearest smaller nominal diame
12、ter deformed bar size shall apply.Requirements providing for deformations and marking shall not be applicable.NOTE 3Welding of the material in this specification should be approached with caution since no specific provisions have been included to enhanceits weldability. When this steel is to be weld
13、ed, a welding procedure suitable for the chemical composition and intended use or service should be used.The use of the latest edition of AWS D1.4 D1.4M is recommended. The AWS D1.4 D1.4M Welding Code describes the proper selection of the fillermetals and preheat/interpass temperatures, as well as p
14、erformance and procedure qualification requirements.1.4 Requirements for alternate bar sizes are presented in Annex A1. The requirements in Annex A1 only apply when specifiedby the purchaser (see 4.2.44.2.5).1.5 The text of this specification references notes and footnotes which provide explanatory
15、material. These notes and footnotes(excluding those in tables) shall not be considered as requirements of the specification.1.6 This specification is applicable for orders in either inch-pound units (as Specification A615) or in SI units (as SpecificationA615M).1 This specification is under the juri
16、sdiction ofASTM Committee A01 on Steel, Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee A01.05on Steel Reinforcement.Current edition approved July 1, 2015Jan. 15, 2016. Published July 2015March 2016. Originally approved in 1968. Last previous edition approved in 20
17、15 asA615/A615M 15.A615/A615M 15a1. DOI: 10.1520/A0615_A0615M-15AE01.10.1520/A0615_A0615M-16.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. Becauseit may not be technically possi
18、ble to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standardCopy
19、right ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States11.7 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI unitsare shown in brackets. The values stated in each system m
20、ay not be exact equivalents; therefore, each system shall be usedindependently of the other. Combining values from the two systems may result in non-conformance with the specification.1.8 This specification does not purport to address all of the safety concerns, if any, associated with its use. It i
21、s the responsibilityof the user of this specification to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior to use.2. Referenced Documents2.1 ASTM Standards:2A6/A6M Specification for General Requirements for Rolled Structural Steel Bars,
22、Plates, Shapes, and Sheet PilingA370 Test Methods and Definitions for Mechanical Testing of Steel ProductsA510/A510M Specification for General Requirements for Wire Rods and Coarse Round Wire, Carbon Steel, and Alloy SteelA700 Guide for Packaging, Marking, and Loading Methods for Steel Products for
23、ShipmentA706/A706M Specification for Deformed and Plain Low-Alloy Steel Bars for Concrete ReinforcementA751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel ProductsE29 Practice for Using Significant Digits in Test Data to Determine Conformance with SpecificationsE290 Test Met
24、hods for Bend Testing of Material for Ductility2.2 ACI Standard:3ACI 318 Building Code Requirements for Structural Concrete2.3 AWS Standard:4AWS D1.4D1.4M Structural Welding CodeReinforcing Steel2.4 U.S. Military Standard:5MIL-STD-129 Marking for Shipment and Storage2.5 U.S. Federal Standard:5Fed. S
25、td. No. 123 Marking for Shipment (Civil Agencies)3. Terminology3.1 Definitions of Terms Specific to This Specification:3.1.1 deformations, ntransverse protrusions on a deformed bar.3.1.2 deformed bar, nsteel bar with protrusions; a bar that is intended for use as reinforcement in reinforced concrete
26、construction.3.1.2.1 Discussion2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.3 Available from American Conc
27、rete 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 Street, #130, Miami, FL 33166-6672, http:/www.aws.org.5 Available from Standardization Documents Order Desk, DODSSP, Bldg. 4, Section D, 700 Robbin
28、s Ave., Philadelphia, PA 19111-5098, http:/www.dodssp.daps.mil.TABLE 1 Deformed Bar Designation Numbers, Nominal Weights Masses, Nominal Dimensions, and Deformation RequirementsBar DesignationNo.Nominal Weight,lb/ftNominal Mass,kg/mNominal DimensionsA Deformation Requirements, in. mmDiameter,in. mmC
29、ross-SectionalArea,in. 2 mm2Perimeter,in. mmMaximumAverageSpacingMinimumAverageHeightMaximum Gap(Chord of 12.5 % ofNominal Perimeter)3 10 0.376 0.560 0.375 9.5 0.11 71 1.178 29.9 0.262 6.7 0.015 0.38 0.143 3.64 13 0.668 0.994 0.500 12.7 0.20 129 1.571 39.9 0.350 8.9 0.020 0.51 0.191 4.95 16 1.043 1.
30、552 0.625 15.9 0.31 199 1.963 49.9 0.437 11.1 0.028 0.71 0.239 6.16 19 1.502 2.235 0.750 19.1 0.44 284 2.356 59.8 0.525 13.3 0.038 0.97 0.286 7.37 22 2.044 3.042 0.875 22.2 0.60 387 2.749 69.8 0.612 15.5 0.044 1.12 0.334 8.58 25 2.670 3.973 1.000 25.4 0.79 510 3.142 79.8 0.700 17.8 0.050 1.27 0.383
31、9.79 29 3.400 5.060 1.128 28.7 1.00 645 3.544 90.0 0.790 20.1 0.056 1.42 0.431 10.910 32 4.303 6.404 1.270 32.3 1.27 819 3.990 101.3 0.889 22.6 0.064 1.63 0.487 12.411 36 5.313 7.907 1.410 35.8 1.56 1006 4.430 112.5 0.987 25.1 0.071 1.80 0.540 13.714 43 7.65 11.38 1.693 43.0 2.25 1452 5.32 135.1 1.1
32、85 30.1 0.085 2.16 0.648 16.518 57 13.60 20.24 2.257 57.3 4.00 2581 7.09 180.1 1.58 40.1 0.102 2.59 0.864 21.920 64B 16.69 24.84 2.500 63.5 4.91 3167 7.85 199.5 1.75 44.5 0.113 2.86 0.957 24.3A The nominal dimensions of a deformed bar are equivalent to those of a plain round bar having the same weig
33、ht mass per foot metre as the deformed bar.B Refer to Note 2.A615/A615M 162The surface of the bar is provided with protrusions that inhibit longitudinal movement of the bar relative to the concretesurrounding the bar in such construction. The protrusions conform to the provisions of this specificati
34、on.3.1.3 plain bar, nsteel bar without protrusions.3.1.4 rib, nlongitudinal protrusion on a deformed bar.4. Ordering Information4.1 Orders for carbon-steel bars for concrete reinforcement under this specification shall contain the following information:4.1.1 Quantity (weight) mass,4.1.2 Deformed or
35、plain,4.1.3 Bar designation number (size) of deformed bars, or nominal diameter (size) of plain bars4.1.4 Cut lengths or coils,4.1.5 Grade, and4.1.6 ASTM designation and year of issue.4.2 The purchaser shall have the option to specify additional requirements, including but not limited to, the follow
36、ing:4.2.1 Require bars in each bundle to be supplied from a single heat (19.1),4.2.2 Requirements for inspection (17.1),4.2.3 Special package marking requirements (20.2),4.2.4 Other special requirements, if any, and4.2.5 Optional requirements of Annex A1.5. Material and Manufacture5.1 The bars shall
37、 be rolled from properly identified heats of mold-cast or strand-cast steel. The steel shall be made by anycommercially accepted process.6. Chemical Composition6.1 The chemical analysis of each heat of steel shall be determined in accordance with Test Methods, Practices, andTerminology A751. The man
38、ufacturer shall make the analysis on test samples taken preferably during the pouring of the heat. Thepercentages of carbon, manganese, phosphorus, and sulfur shall be determined. The phosphorus content thus determined shall notexceed 0.06 %.6.2 A product check, for phosphorus, made by the purchaser
39、 shall not exceed that specified in 6.1 by more than 25 %.7. Requirements for Deformations7.1 Deformations shall be spaced along the bar at substantially uniform distances. The deformations on opposite sides of thebar shall be similar in size, shape, and pattern.7.2 The deformations shall be placed
40、with respect to the axis of the bar so that the included angle is not less than 45. Wherethe line of deformations forms an included angle with the axis of the bar from 45 to 70 inclusive, the deformations shall alternatelyreverse in direction on each side, or those on one side shall be reversed in d
41、irection from those on the opposite side. Where theline of deformations is over 70, a reversal in direction shall not be required.7.3 The average spacing or distance between deformations on each side of the bar shall not exceed seven tenths of the nominaldiameter of the bar.7.4 The overall length of
42、 deformations shall be such that the gap (measured as a chord) between the ends of the deformationsshall not exceed 12.5 % of the nominal perimeter of the bar. Where the ends terminate in a rib, the width of the rib shall beconsidered as the gap between these ends. The summation of the gaps shall no
43、t exceed 25 % of the nominal perimeter of the bar.The nominal perimeter of the bar shall be 3.1416 times the nominal diameter.7.5 The spacing, height, and gap of deformations shall conform to the requirements prescribed in Table 1.8. Measurements of Deformations8.1 The average spacing of deformation
44、s shall be determined by measuring the length of a minimum of ten spaces and dividingthat length by the number of spaces included in the measurement. The measurement shall begin from a point on a deformation atthe beginning of the first space to a corresponding point on a deformation after the last
45、included space. Spacing measurements shallnot be made over a bar area containing bar marking symbols involving letters or numbers.8.2 The average height of deformations shall be determined from measurements made on not less than two typical deformations.Determinations shall be based on three measure
46、ments per deformation, one at the center of the overall length and the other twoat the quarter points of the overall length.A615/A615M 1638.3 Insufficient height, insufficient circumferential coverage, or excessive spacing of deformations shall not constitute cause forrejection unless it has been cl
47、early established by determinations on each lot (Note 4) tested that typical deformation height, gap,or spacing do not conform to the minimum requirements prescribed in Section 7. No rejection shall be made on the basis ofmeasurements if fewer than ten adjacent deformations on each side of the bar a
48、re measured.NOTE 4As used within the intent of 8.3, the term “lot” shall mean all the bars of one bar size and pattern of deformations contained in an individualshipping release or shipping order.9. Tensile Requirements9.1 The material, as represented by the test specimens, shall conform to the requ
49、irements for tensile properties prescribed inTable 2.9.2 The yield point or yield strength shall be determined by one of the following methods:9.2.1 The yield point shall be determined by the drop or halt of the gauge of the tensile testing machine, where the steel testedhas a sharp-kneed or well-defin
