1、Designation: A615/A615M 15a1American 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 f
3、or use by agencies of the U.S. Department of Defense.1NOTEEditorial 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 bars containing alloy additions, such as with th
4、e Asso-ciation for Iron and Steel Technology and the Society ofAutomotive Engineers series of alloy steels, are permitted ifthe resulting product meets all the other requirements of thisspecification. The standard sizes and dimensions of deformedbars and their number designations are given in Table
5、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 520MPa, 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 100 690 reinforcing bar
6、s 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 reinforcing bars have a ratio of specified tensilestrength to specified yield strength of 1.15. Design
7、ers 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 governed by the tensile strength ofthe reinforcement, primarily in beams and slabs. If this is of concer
8、n, 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 Concrete (ACI 318)” may notrecognize Grade 100 690 reinforcing bars: therefore the 125 % ofspecified y
9、ield 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 be aware that design standards do notrecognize the use of the No. 20 64 bar, the largest bar included
10、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 performance at service andfactored loads.1.3 Plain bars, in sizes up to and including 212 in. 63.5 mmin
11、diameter in coils or cut lengths, when ordered shall befurnished under this specification in Grade 40 280, Grade 60420, Grade 75 520, Grade 80 550, and Grade 100 690.For ductility properties (elongation and bending), test provi-sions of the nearest smaller nominal diameter deformed barsize shall app
12、ly. Requirements providing for deformations andmarking shall not be applicable.NOTE 3Welding of the material in this specification should beapproached with caution since no specific provisions have been includedto enhance its weldability. When this steel is to be welded, a weldingprocedure suitable
13、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 metals and preheat/interpass temperatures, aswell as performance and procedure qualificat
14、ion requirements.1.4 Requirements for alternate bar sizes are presented inAnnex A1. The requirements in Annex A1 only apply whenspecified by the purchaser (see 4.2.4).1.5 The text of this specification references notes andfootnotes which provide explanatory material. These notes andfootnotes (exclud
15、ing 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 A615M).1.7 The values stated in either inch-pound units or SI unitsare to be regarded sep
16、arately 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 valuesfrom the two systems may result in non-conformance with thespecification.1.8 This spe
17、cification does not purport to address all of thesafety concerns, if any, associated with its use. It is the1This 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.Cu
18、rrent edition approved July 1, 2015. Published July 2015. Originally approvedin 1968. Last previous edition approved in 2015 as A615/A615M 15. DOI:10.1520/A0615_A0615M-15AE01.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box
19、C700, West Conshohocken, PA 19428-2959. United States1responsibility of the user of this specification to establishappropriate safety and health practices and determine theapplicability of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2A6/A6M Specification for General
20、 Requirements for RolledStructural Steel Bars, Plates, Shapes, and Sheet PilingA370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA510/A510M Specification for General Requirements forWire Rods and Coarse Round Wire, Carbon Steel, andAlloy SteelA700 Guide for Packaging, Marking,
21、 and Loading Methodsfor Steel Products for ShipmentA706/A706M Specification for Deformed and Plain Low-Alloy Steel Bars for Concrete ReinforcementA751 Test Methods, Practices, and Terminology for Chemi-cal Analysis of Steel ProductsE29 Practice for Using Significant Digits in Test Data toDetermine C
22、onformance with SpecificationsE290 Test Methods for Bend Testing of Material for Ductil-ity2.2 ACI Standard:3ACI 318 Building Code Requirements for Structural Con-crete2.3 AWS Standard:4AWS D1.4 D1.4M Structural Welding CodeReinforcingSteel2.4 U.S. Military Standard:5MIL-STD-129 Marking for Shipment
23、 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:3.1.1 deformations, ntransverse protrusions on a de-formed bar.3.1.2 deformed bar, nsteel bar with protrusions; a bar thatis intended fo
24、r use as reinforcement in reinforced concreteconstruction.3.1.2.1 DiscussionThe surface of the bar is provided withprotrusions that inhibit longitudinal movement of the barrelative to the concrete surrounding the bar in such construc-tion. The protrusions conform to the provisions of this speci-fica
25、tion.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 reinforcementunder this specification shall contain the following informa-tion:4.1.1 Quantity (weight) mass,4.1.2 Deformed o
26、r 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 designation and year of issue.4.2 The purchaser shall have the option to specify additionalrequirements, including but not limited to, the follow
27、ing:4.2.1 Require bars in each bundle to be supplied from asingle heat (19.1),4.2.2 Special package marking requirements (20.2),4.2.3 Other special requirements, if any, and4.2.4 Optional requirements of Annex A1.5. Material and Manufacture5.1 The bars shall be rolled from properly identified heats
28、ofmold-cast or strand-cast steel. The steel shall be made by anycommercially accepted process.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
29、 Summary page onthe ASTM website.3Available from American Concrete Institute (ACI), P.O. Box 9094, FarmingtonHills, MI 48333-9094, http:/www.concrete.org.4Available from American Welding Society (AWS), 8669 NW 36 Street, #130,Miami, FL 33166-6672, http:/www.aws.org.5Available from Standardization Do
30、cuments Order Desk, DODSSP, Bldg. 4,Section D, 700 Robbins 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 Dim
31、ensionsADeformation Requirements, in. mmDiameter,in. mmCross-SectionalArea,in.2mm2Perimeter,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
32、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 11.1 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
33、 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 3.544 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
34、.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 20.24 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 equivalen
35、t to those of a plain round bar having the same weight mass per foot metre as the deformed bar.BRefer to Note 2.A615/A615M 15a126. Chemical Composition6.1 The chemical analysis of each heat of steel shall bedetermined in accordance with Test Methods, Practices, andTerminology A751. The manufacturer
36、shall make the analysison test samples taken preferably during the pouring of the heat.The percentages of carbon, manganese, phosphorus, and sulfurshall be determined. The phosphorus content thus determinedshall not exceed 0.06 %.6.2 Aproduct check, for phosphorus, made by the purchasershall not exc
37、eed 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 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
38、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 from 45 to 70 inclusive, the deformations shallalternately reverse in direction on each side, or those on oneside shall be reversed in direction from th
39、ose 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 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 shal
40、l 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 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 th
41、e 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 deformations shallconform to the requirements prescribed in Table 1.8. Measurements of Deformations8.1 The average spacing of deformations shall be deter-mine
42、d by measuring the length of a minimum of ten spaces anddividing that length by the number of spaces included in themeasurement. The measurement shall 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.Spaci
43、ng measurements shall not be made over a bar areacontaining bar marking symbols involving letters or numbers.8.2 The average height of deformations shall be determinedfrom measurements made on not less than two typical defor-mations. Determinations shall be based on three measurementsper deformation
44、, one at the center of the overall length and theother two at the quarter points of the overall length.8.3 Insufficient height, insufficient circumferentialcoverage, or excessive spacing of deformations shall notconstitute cause for rejection unless it has been clearly estab-lished by determinations
45、 on each lot (Note 4) tested that typicaldeformation height, gap, or spacing do not conform to theminimum requirements prescribed in Section 7. No rejectionshall 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
46、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 shipping order.9. Tensile Requirements9.1 The material, as represented by the test specimens, shallconform to the requirements for tensile properties prescri
47、bed 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 haltof the gauge of the tensile testing machine, where the steeltested has a sharp-kneed or well-defined yield point.9.2.2 Where the steel t
48、ested does not have a well-definedyield point, the yield strength shall be determined by the offsetmethod (0.2 % offset), as described in Test Methods andDefinitions A370.9.3 When material is furnished in coils, the test specimenshall be taken from the coil and straightened prior to placing itin the
49、 jaws of the tensile testing machine. (See Note 5.)NOTE 5Straighten the test specimen to avoid formation of local sharpbends and to minimize cold work. Insufficient straightening prior toattaching the extensometer can result in lower-than-actual yield strengthreadings.9.3.1 Test specimens taken from post-fa
