1、Designation: A615/A615M 14 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 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.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 the Asso-ciation for Iron and Steel Technology and the Society ofAut
4、omotive 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 1.1.2 Bars are of four minimum yield strength levels: namely,40 00
5、0 psi 280 MPa, 60 000 psi 420 MPa, 75 000 psi 520MPa, and 80 000 psi 550 MPa, designated as Grade 40280, Grade 60 420, Grade 75 520, and Grade 80 550,respectively.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 thi
6、s specification in Grade 40 280, Grade 60420, Grade 75 520, and Grade 80 550. For ductilityproperties (elongation and bending), test provisions of thenearest smaller nominal diameter deformed bar size shallapply. Requirements providing for deformations and markingshall not be applicable.NOTE 1Weldin
7、g 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 for the chemical composition and intended use orservice should be used. The use of the late
8、st 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 qualification requirements.1.4 Requirements for alternate bar sizes are presented inAnnex A1. The req
9、uirements 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 (excluding those in tables) shall not be considered asrequirements of the specification.1.6 This s
10、pecification 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 separately as standard. Within the text, theSI units are shown in brackets. The values stated
11、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 specification does not purport to address all of thesafety concerns, if any, associated with i
12、ts use. It is theresponsibility 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 Requirements for RolledStructural St
13、eel 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 Practices for Packaging, Marking, and Loading Meth-ods for Steel P
14、roducts for Shipment (Withdrawn 2014)3A706/A706M Specification for Low-Alloy Steel Deformedand Plain Bars for Concrete Reinforcement1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.05 o
15、n Steel Reinforcement.Current edition approved April 1, 2014. Published May 2014. Originallyapproved in 1968. Last previous edition approved in 2013 as A615/A615M 13.DOI: 10.1520/A0615_A0615M-14.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at
16、serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM In
17、ternational, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1A751 Test Methods, Practices, and Terminology for Chemi-cal Analysis of Steel ProductsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications2.2 AWS Standard:4A
18、WS D1.4/D1.4M Structural Welding CodeReinforcingSteel2.3 U.S. Military Standard:5MIL-STD-129 Marking for Shipment and Storage2.4 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, ntr
19、ansverse 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 withlugs or protrusions that inhibit longitudinal movement of thebar relativ
20、e to the concrete surrounding the bar in suchconstruction. The lugs or protrusions conform to the provisionsof this specification.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
21、 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 designation and year
22、 of issue,4.2 The purchaser shall have the option to specify additionalrequirements, including but not limited to, the following:4.2.1 Certified mill test reports (see Section 16),4.2.2 Special package marking requirements (20.2),4.2.3 Other special requirements, if any, and4.2.4 Optional requiremen
23、ts 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 Composition6.1 The chemical analysis of each heat of steel shall bedetermined in accordance
24、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 sulfurshall be determined. The phosphorus content thus determinedshall not exceed 0.06 %.6.
25、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 distances. The deformations on opposite sides ofthe bar shall be similar in size, s
26、hape, 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 from 45 to 70 inclusive, the deformations shallalternately reverse in direction on e
27、ach 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 between deformationson each side of the bar shall not exceed seven tenths of thenom
28、inal diameter of the bar.4Available from American Welding Society (AWS), 8669 NW 36 Street, #130,Miami, FL 33166-6672, http:/www.aws.org.5Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http:/www.dodssp.daps.mil.TABLE 1 D
29、eformed 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. mmMaximumAverageSpacingMinimumAve
30、rageHeightMaximum 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 11.1 0.028 0.71 0.239 6.16 19 1.50
31、2 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 3.544 90.0 0.790 20.1 0.056 1.42 0.
32、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 20.24 2.257 57.3 4.00 2581 7.09 18
33、0.1 1.58 40.1 0.102 2.59 0.864 21.9AThe 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.A615/A615M 1427.4 The overall length of deformations shall be such that thegap (measured as a chord) between the en
34、ds 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 the nominal perimeter ofthe bar. The nominal perimeter of th
35、e 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-mined by measuring the length of a minimum of ten spaces anddi
36、viding 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.Spacing measurements shall not be made over a bar areacontainin
37、g 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, one at the center of the overall length and theother two
38、 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 on each lot (Note 2) tested that typicaldeformation heigh
39、t, 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 2As used within the intent of 8.3, the term “lot” shall mean allthe bars of on
40、e 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 prescribed inTable 2.9.2 The yield point or yield strength shall
41、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 tested does not have a well-definedyield point, the yield s
42、trength 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 jaws of the tensile testing machine. (See Note 3.)NOTE 3S
43、traighten 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-fabricated materialshall not be used to determine co
44、nformance to this specifica-tion. (See Note 4.)NOTE 4Multiple bending distortion from mechanical straighteningand fabricating machines can lead to excessive cold work, resulting inhigher yield strengths, lower elongation values, and a loss of deformationheight.9.4 The percentage of elongation shall
45、be as prescribed inTable 2.10. Bending Requirements10.1 The bend-test specimen shall withstand being bentaround a pin without cracking on the outside radius of the bentportion. The requirements for degree of bending and sizes ofpins are prescribed in Table 3. When material is furnished incoils, the
46、test specimen shall be straightened prior to placing itin the bend tester.10.2 The bend test shall be made on specimens of sufficientlength to ensure free bending and with apparatus that provides:10.2.1 Continuous and uniform application of forcethroughout the duration of the bending operation.10.2.
47、2 Unrestricted movement of the specimen at points ofcontact with the apparatus and bending around a pin free torotate.10.2.3 Close wrapping of the specimen around the pinduring the bending operation.10.3 It is permissible to use more severe methods of bendtesting, such as placing a specimen across t
48、wo pins free torotate and applying the bending force with a fixed pin. WhenTABLE 2 Tensile RequirementsGrade 40280AGrade 60420Grade 75520Grade 80550Tensile strength, min, psi MPa 60 000 420 90 000 620 100 000 690 105 000 725Yield strength, min, psi MPa 40 000 280 60 000 420 75 000 520 80 000 550Elon
49、gation in 8 in. 200 mm, min, %Bar Designation No.3 10 11 9 7 74, 5 13, 16 12 9 7 76 19 12 9 7 77, 8 22, 25 . . . 8 7 79, 10, 11 29, 32, 36 . . . 7 6 614, 18 43, 57 . . . 7 6 6AGrade 40 280 bars are furnished only in sizes 3 through 6 10 through 19.A615/A615M 143failures occur under more severe methods, r
