1、Designation: A706/A706M 15Standard Specification forDeformed and Plain Low-Alloy Steel Bars for ConcreteReinforcement1This standard is issued under the fixed designation A706/A706M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, t
2、he 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 for use by agencies of the U.S. Department of Defense.1. Scope*1.1 GeneralThis specific
3、ation covers deformed and plainlow-alloy steel bars in cut lengths and coils for concretereinforcement intended for applications where restrictive me-chanical properties and chemical composition are required forcompatibility with controlled tensile property applications or toenhance weldability. The
4、 standard sizes and dimensions ofdeformed bars and their number designations are given inTable 1.1.2 GradeBars are of two minimum yield strength levels:namely, 60 000 psi 420 MPa and 80 000 psi 550 MPa,designated as Grade 60 420 and Grade 80 550, respectively.1.3 Plain bars, in sizes up to and inclu
5、ding 212 in. 63.5 mmin diameter in coils or cut lengths, when ordered, shall befurnished under this specification. For ductility properties(elongation and bending), test provisions of the nearest smallernominal diameter deformed bar size shall apply. Requirementsproviding for deformations and markin
6、g shall not be appli-cable.1.4 Controlled Tensile PropertiesThis specification limitstensile properties (Table 2) to provide the desired yield/tensileproperties for controlled tensile property applications.1.5 WeldingThis specification limits chemical composi-tion (6.2) and carbon equivalent (6.4) t
7、o enhance the weldabil-ity of the material. When this steel is to be welded, a weldingprocedure suitable for the chemical composition and intendeduse or service should be used. The use of the latest edition ofAWS D1.4 D1.4M is recommended. The AWS D1.4/D1.4MWelding Code describes the proper selectio
8、n of the fillermetals, preheat/interpass temperatures, as well as, performanceand procedure qualification requirements.1.6 Requirements for alternate bar sizes are presented inAnnex A1. The requirements in Annex A1 only apply whenspecified by the purchaser (see 4.2.4).1.7 The text of this specificat
9、ion references notes andfootnotes that provide explanatory material. These notes andfootnotes, excluding those in tables, shall not be considered asrequirements of this specification.1.8 This specification is applicable for orders in eitherinch-pound units (Specification A706) or in SI units Specifi
10、-cation A706M.1.9 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. Combi
11、ning valuesfrom the two systems may result in non-conformance with thisspecification.1.10 This specification does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this specification to establishappropriate safety and health pra
12、ctices and determine theapplicability of regulatory limitations prior to use.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 Prod
13、uctsA510/A510M Specification for General Requirements forWire Rods and Coarse Round Wire, Carbon Steel, andAlloy SteelA615/A615M Specification for Deformed and Plain Carbon-Steel Bars for Concrete ReinforcementA700 Guide for Packaging, Marking, and Loading Methodsfor Steel Products for ShipmentA751
14、Test Methods, Practices, and Terminology for Chemi-cal Analysis of Steel Products1This 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
15、 1, 2015. Published September 2015. Originallyapproved in 1974. Last previous edition approved in 2014 as A706/A706M 14.DOI: 10.1520/A0706_A0706M-15.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStanda
16、rds volume information, refer to the standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1E29 Practice for Using Significan
17、t Digits in Test Data toDetermine Conformance with SpecificationsE290 Test Methods for Bend Testing of Material for Ductil-ity2.2 AWS Standard:3AWS D1.4 D1.4M Structural Welding CodeReinforcingSteel2.3 U.S. Military Standard:4MIL-STD-129 Marking for Shipment and Storage2.4 U.S. Federal Standard:4Fed
18、. 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 for use as reinforcement in reinforced concr
19、ete andrelated construction.3.1.2.1 DiscussionThe surface of the bar is provided withlugs or protrusions that inhibit longitudinal movement of thebar relative to the concrete surrounding the bar in suchconstruction. The lugs or protrusions conform to the provisionsof this specification.3.1.3 plain b
20、ar, nsteel bar without protrusions.3.1.4 rib, nlongitudinal protrusion on a deformed bar.4. Ordering Information4.1 Orders for low-alloy steel bars for concrete reinforce-ment under this specification shall contain the followinginformation:4.1.1 Quantity (weight) mass,4.1.2 Deformed or plain,4.1.3 B
21、ar designation number (size) of deformed bars, ornominal diameter (size) of plain bars,4.1.4 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 following:4.2.1 Spec
22、ial package marking requirements (20.2),4.2.2 Require bars in each bundle to be supplied from asingle heat (16.1),4.2.3 Other special requirements, if any, and4.2.4 Optional requirements of Annex A1, if applicable.5. Material and Manufacture5.1 The bars shall be processed from properly identifiedhea
23、ts of mold-cast or strand-cast steel. The steel shall be madeby any commercially accepted process.6. Chemical Composition6.1 The chemical analysis of each heat shall be determinedin accordance with Test Methods, Practices, and TerminologyA751. The manufacturer shall make the analysis on testsamples
24、taken preferably during the pouring of the heat. Thepercentages of carbon, manganese, phosphorus, sulfur, silicon,copper, nickel, chromium, molybdenum, and vanadium shallbe determined.6.2 The chemical composition as shown by heat analysisshall be limited by the following:Element max, %CarbonManganes
25、e0.301.50Phosphorus 0.035Sulfur 0.045Silicon 0.503Available from American Welding Society (AWS), 8669 NW 36 Street, #130,Miami, FL 33166-6672, http:/www.aws.org.4Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http:/www.d
26、odssp.daps.mil.TABLE 1 Deformed Bar Designation Numbers, Nominal Weights Masses, Nominal Dimensions, and Deformation RequirementsBarDesig-nationNo.Nominal Weight, lb/ftNominal Mass,kg/mNominal DimensionsADeformation Requirements, in. mmDiameter,in. mmCross-Sectional Areain.2mm2Perimeter,in. mmMaximu
27、m AverageSpacingMinimum AverageHeightMaximum 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.
28、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 3.544 90
29、.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 20.24 2
30、.257 57.3 4.00 2581 7.09 180.1 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.TABLE 2 Tensile RequirementsGrade 60 420 Grade 80 550Tensile strength, min, psi MPa 80 0
31、00 550A100 000 690AYield strength, min, psi MPa 60 000 420 80 000 550Yield strength, max, psi MPa 78 000 540 98 000 675Elongation in 8 in. 200 mm, min, %Bar Designation Nos.3, 4, 5, 6 10, 13, 16, 19 14 127, 8, 9, 10, 11 22, 25, 29, 32, 36 12 1214, 18 43, 57 10 10ATensile strength shall not be less t
32、han 1.25 times the actual yield strength.A706/A706M 1526.3 Choice and use of alloying elements, combined withcarbon, phosphorus, and sulfur to produce the mechanicalproperties prescribed in Table 2 and Table 3, shall be made bythe manufacturer. Elements commonly used includemanganese, silicon, coppe
33、r, nickel, chromium, molybdenum,vanadium, columbium, titanium, and zirconium.6.4 The heat analysis shall be such as to provide a carbonequivalent (C.E.) not exceeding 0.55 % as calculated by thefollowing formula:C.E. 5 %C1%Mn61%Cu401%Ni201%Cr102%Mo502%V10(1)6.5 Product (Check) Verification AnalysisA
34、 product checkanalysis made by the purchaser shall not exceed the followingpercentages:Element max, %CarbonManganese0.33 %1.56 %Phosphorus 0.043 %Sulfur 0.053 %Silicon 0.55 %7. Requirements for Deformations7.1 Deformations shall be spaced along the bar at substan-tially uniform distances. The deform
35、ations 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 from 45 to 70, inclusi
36、ve, the deformations shallreverse alternately in direction on each side, or those on oneside shall be reversed in direction from those on the oppositeside. Where the line of deformation is over 70, a reversal indirection shall not be required.7.3 The average spacing or distance between deformationso
37、n each side of the bar shall not exceed710 of the nominaldiameter 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 the ends terminate in a rib, the
38、 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 deformations shallconform to the requi
39、rements 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 10 spaces anddividing that length by the number of spaces included in themeasurement. The measurement shall begin from a point on adeforma
40、tion 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 shall be determinedfrom measureme
41、nts 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 circumferentialcoverage, or excessive sp
42、acing of deformations shall notconstitute cause for rejection unless it has been clearly estab-lished by determinations on each lot (see Note 1) tested thattypical deformation height, gap, or spacing do not conform tothe minimum requirements prescribed in Section 7. No rejec-tion shall be made on th
43、e basis of measurements if fewer thanten adjacent deformations on each side of the bar are measured.NOTE 1As 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 shipping order.9. Tensile Requir
44、ements9.1 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 of thebeam or halt
45、 in the gauge of the tensile testing machine, wherethe steel tested has a sharp-kneed or well-defined yield point.9.2.2 Where the steel does not have a well-defined yieldpoint, the yield strength shall be determined by the offsetmethod (0.2 % offset) as described in Test Methods andDefinitions A370.
46、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 2.)NOTE 2Straighten the test specimen to avoid formation of local sharpbends and to minimize cold work. Insufficient straig
47、htening 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 conformance to this specifica-tion. (See Note 3.)NOTE 3Multiple bending distortion from mechanical straighteningand
48、 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 be as prescribed inTable 2.TABLE 3 Bend Test RequirementsBar Designation No.Pin Diameter for 180 Bend TestsGrade 60 420 Grade 80 5503, 4, 5 10, 13, 16 3dA312 dA6, 7, 8 19, 22, 25 4d 5d9, 10, 11 29, 32, 36 6d 7d14, 18 43, 57 8d 9dAd = nominal diameter of specimen.A706/A706M 15310. Bending Requirements10.1 The bend test specimen shall withstand being bentaround a pin without cracking on the ou
