1、Designation: A615/A615M 181American 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 immediately following
2、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 been approved fo
3、r use by agencies of the U.S. Department of Defense.1NOTEEditorial corrections were made throughout in July 2018.1. Scope*1.1 This specification covers deformed and plain carbon-steel bars in cut lengths and coils for concrete reinforcement.AnnexA2 of this specification covers deformed bars for use
4、forother applications. Steel bars containing alloy additions, suchas with the Association for Iron and Steel Technology and theSociety of Automotive Engineers series of alloy steels, arepermitted if the resulting product meets all the other require-ments of this specification. The standard sizes and
5、 dimensionsof deformed bars and their number designations are given inTable 1.1.2 Unless specified for use for other applications in AnnexA2, bars are of four minimum yield strength levels: namely,40 000 psi 280 MPa, 60 000 psi 420 MPa, 80 000 psi 550MPa, and 100 000 psi 690 MPa, designated as Grade
6、 40280, Grade 60 420, Grade 80 550, and Grade 100 690,respectively.NOTE 1Grade 100 690 reinforcing bars were introduced in thisspecification in 2015. In contrast to the lower grades, which have ratios ofspecified tensile strength to specified yield strength that range from 1.31to 1.5, Grade 100 690
7、reinforcing bars have a ratio of specified tensilestrength to specified yield strength of 1.15. Designers should be aware thatthere will, therefore, be a lower margin of safety and reduced warning offailure following yielding when Grade 100 690 bars are used instructural members where strength is go
8、verned by the tensile strength ofthe reinforcement, primarily in beams and slabs. If this is of concern, thepurchaser has the option of specifying a minimum ratio of tensile strengthto actual yield strength. Consensus design codes and specifications such as“Building Code Requirements for Structural
9、Concrete (ACI 318)” may notrecognize Grade 100 690 reinforcing bars: therefore the 125 % ofspecified yield strength requirements in tension and compression are notapplicable. Mechanical and welded splices should meet a minimumspecified tensile strength of 115 000 psi 790 MPa.NOTE 2Designers need to
10、be aware that design standards do notrecognize the use of the No. 20 64 bar, the largest bar included in thisspecification. Structural members reinforced with No. 20 64 bars mayrequire approval of the building official or other appropriate authority andrequire special detailing to ensure adequate pe
11、rformance at service andfactored loads.1.3 Plain bars, in sizes up to and including 212 in. 63.5 mmin diameter in coils or cut lengths, when ordered shall befurnished under this specification in Grade 40 280, Grade 60420, Grade 80 550, and Grade 100 690. For ductilityproperties (elongation and bendi
12、ng), test provisions of thenearest smaller nominal diameter deformed bar size shallapply. Requirements providing for deformations and markingshall not be applicable.NOTE 3Welding of the material in this specification should beapproached with caution since no specific provisions have been includedto
13、enhance its weldability. When this steel is to be welded, a weldingprocedure suitable for the chemical composition and intended use orservice should be used. The use of the latest edition of AWS D1.4 D1.4Mis recommended. The AWS D1.4 D1.4M Welding Code describes theproper selection of the filler met
14、als and preheat/interpass temperatures, aswell as performance and procedure qualification requirements.1.4 Requirements for alternate bar sizes are presented inAnnex A1. The requirements in Annex A1 only apply whenspecified by the purchaser (see 4.2.5).1.5 The text of this specification references n
15、otes andfootnotes which provide explanatory material. These notes andfootnotes (excluding those in tables) shall not be considered asrequirements of the specification.1.6 This specification is applicable for orders in eitherinch-pound units (as Specification A615) or in SI units (asSpecification A61
16、5M).1.7 The values stated in either inch-pound units or SI unitsare to be regarded separately as standard. Within the text, theSI units are shown in brackets. The values stated in eachsystem may not be exact equivalents; therefore, each systemshall be used independently of the other. Combining value
17、sfrom the two systems may result in non-conformance with thespecification.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.05 on Steel Reinforcement.Current edition approved July 1, 201
18、8. Published July 2018. Originally approvedin 1968. Last previous edition approved in 2016 as A615/A615M 16. DOI:10.1520/A0615_A0615M-18E01.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2
19、959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical
20、 Barriers to Trade (TBT) Committee.11.8 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety, health, and environmental practices and deter-mine the applicability of
21、 regulatory limitations prior to use.1.9 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Tr
22、ade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2A6/A6M Specification for General Requirements for RolledStructural Steel Bars, Plates, Shapes, and Sheet PilingA370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA510/A510M Sp
23、ecification for General Requirements forWire Rods and Coarse Round Wire, Carbon Steel, andAlloy SteelA700 Guide for Packaging, Marking, and Loading Methodsfor Steel Products for ShipmentA706/A706M Specification for Deformed and Plain Low-Alloy Steel Bars for Concrete ReinforcementA751 Test Methods,
24、Practices, and Terminology for Chemi-cal Analysis of Steel ProductsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE290 Test Methods for Bend Testing of Material for Ductil-ity2.2 ACI Standard:3ACI 318 Building Code Requirements for Structural Con-cr
25、ete2.3 AWS Standard:4AWS D1.4 D1.4M Structural Welding CodeReinforcingSteel2.4 U.S. Military Standard:5MIL-STD-129 Marking for Shipment and Storage2.5 U.S. Federal Standard:5Fed. Std. No. 123 Marking for Shipment (Civil Agencies)3. Terminology3.1 Definitions of Terms Specific to This Specification:3
26、.1.1 deformations, ntransverse protrusions on a de-formed bar.3.1.2 deformed bar, nsteel bar with protrusions; a bar thatis intended for use as reinforcement in reinforced concreteconstruction.3.1.2.1 DiscussionThe surface of the bar is provided withprotrusions that inhibit longitudinal movement of
27、the barrelative to the concrete surrounding the bar in such construc-tion. The protrusions conform to the provisions of this speci-fication.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 fo
28、r concrete reinforcementunder this specification shall contain the following informa-tion:4.1.1 Quantity (weight) mass,4.1.2 Deformed or plain,4.1.3 Bar designation number (size) of deformed bars, ornominal diameter (size) of plain bars4.1.4 Cut lengths or coils,4.1.5 Grade, and4.1.6 ASTM designatio
29、n and year of issue.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from American Concrete Institu
30、te (ACI), 38800 Country Club Dr.,Farmington Hills, MI 48331-3439, http:/www.concrete.org.4Available from American Welding Society (AWS), 8669 NW 36 St., #130,Miami, FL 33166-6672, http:/www.aws.org.5Available from DLA Document Services, Building 4/D, 700 Robbins Ave.,Philadelphia, PA 19111-5094, htt
31、p:/quicksearch.dla.mil.TABLE 1 Deformed Bar Designation Numbers, Nominal Weights Masses, Nominal Dimensions, and Deformation RequirementsBar DesignationNo.Nominal Weight,lb/ftNominal Mass,kg/mNominal DimensionsADeformation Requirements, in. mmDiameter,in. mmCross-SectionalArea,in.2mm2Perimeter,in. m
32、mMaximumAverageSpacingMinimumAverageHeightMaximum 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 1.552 0.625 15.9 0.31 199 1.963 49.9 0.437 11
33、.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 9.79 29 3.400 5.060 1.128 28.7 1.00 645 3.5
34、44 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 1.185 30.1 0.085 2.16 0.648 16.518 57 13.60 20
35、.24 2.257 57.3 4.00 2581 7.09 180.1 1.58 40.1 0.102 2.59 0.864 21.920 64B16.69 24.84 2.500 63.5 4.91 3167 7.85 199.5 1.75 44.5 0.113 2.86 0.957 24.3AThe nominal dimensions of a deformed bar are equivalent to those of a plain round bar having the same weight mass per foot metre as the deformed bar.BR
36、efer to Note 2.A615/A615M 18124.2 The purchaser shall have the option to specify additionalrequirements, including but not limited to, the following:4.2.1 Require bars in each bundle to be supplied from asingle heat (19.1),4.2.2 Requirements for inspection (17.1),4.2.3 Special package marking requir
37、ements (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 be rolled from properly identified heats ofmold-cast or strand-cast steel. The steel shall be made by anycommercially accepted process.6. Chemical Composit
38、ion6.1 The chemical analysis of each heat of steel shall bedetermined in accordance with Test Methods, Practices, andTerminology A751. The manufacturer shall make the analysison test samples taken preferably during the pouring of the heat.The percentages of carbon, manganese, phosphorus, and sulfurs
39、hall be determined. The phosphorus content thus determinedshall not exceed 0.06 %.6.2 Aproduct check, for phosphorus, made by the purchasershall not exceed that specified in 6.1 by more than 25 %.7. Requirements for Deformations7.1 Deformations shall be spaced along the bar at substan-tially uniform
40、 distances. The deformations on opposite sides ofthe bar shall be similar in size, shape, and pattern.7.2 The deformations shall be placed with respect to the axisof the bar so that the included angle is not less than 45. Wherethe line of deformations forms an included angle with the axisof the bar
41、from 45 to 70 inclusive, the deformations shallalternately reverse in direction on each side, or those on oneside shall be reversed in direction from those on the oppositeside. Where the line of deformations is over 70, a reversal indirection shall not be required.7.3 The average spacing or distance
42、 between deformationson each side of the bar shall not exceed seven tenths of thenominal diameter of the bar.7.4 The overall length of deformations shall be such that thegap (measured as a chord) between the ends of the deforma-tions shall not exceed 12.5 % of the nominal perimeter of thebar. Where
43、the ends terminate in a rib, the width of the rib shallbe considered as the gap between these ends. The summationof the gaps shall not exceed 25 % of the nominal perimeter ofthe bar. The nominal perimeter of the bar shall be 3.1416 timesthe nominal diameter.7.5 The spacing, height, and gap of deform
44、ations shallconform to the requirements prescribed in Table 1.8. Measurements of Deformations8.1 The average spacing of deformations shall be deter-mined by measuring the length of a minimum of ten spaces anddividing that length by the number of spaces included in themeasurement. The measurement sha
45、ll begin from a point on adeformation at the beginning of the first space to a correspond-ing point on a deformation after the last included space.Spacing measurements shall not be made over a bar areacontaining bar marking symbols involving letters or numbers.8.2 The average height of deformations
46、shall be determinedfrom measurements made on not less than two typical defor-mations. Determinations shall be based on three measurementsper deformation, one at the center of the overall length and theother two at the quarter points of the overall length.8.3 Insufficient height, insufficient circumf
47、erentialcoverage, or excessive spacing of deformations shall notconstitute cause for rejection unless it has been clearly estab-lished by determinations on each lot (Note 4) tested that typicaldeformation height, gap, or spacing do not conform to theminimum requirements prescribed in Section 7. No r
48、ejectionshall be made on the basis of measurements if fewer than tenadjacent deformations on each side of the bar are measured.NOTE 4As used within the intent of 8.3, the term “lot” shall mean allthe bars of one bar size and pattern of deformations contained in anindividual shipping release or shipp
49、ing order.9. Tensile Requirements9.1 The material, as represented by the test specimens, shallconform to the requirements for tensile properties prescribed inTable 2.9.2 The yield point or yield strength shall be determined byone of the following methods:9.2.1 The yield point shall be determined by the drop or hal
