1、Designation: A706/A706M 15A706/A706M 16Standard 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 o
2、f 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 for use by agencies of the U.S. Department of Defense.1. Scope*1.1 General
3、This specification covers deformed and plain low-alloy steel bars in cut lengths and coils for concretereinforcement intended for applications where restrictive mechanical properties and chemical composition are required forcompatibility with controlled tensile property applications or to enhance we
4、ldability. The standard sizes and dimensions ofdeformed bars and their number designations are given in Table 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
5、 up to and including 212 in. 63.5 mm in diameter in coils or cut lengths, when ordered, shall be furnishedunder this specification. For ductility properties (elongation and bending), test provisions of the nearest smaller nominal diameterdeformed bar size shall apply. Requirements providing for defo
6、rmations and marking shall not be applicable.1.4 Controlled Tensile PropertiesThis specification limits tensile properties (Table 2) to provide the desired yield/tensileproperties for controlled tensile property applications.1.5 WeldingThis specification limits chemical composition (6.2) and carbon
7、equivalent (6.4) to enhance the weldability of thematerial. When this steel is to be welded, a welding procedure suitable for the chemical composition and intended use or serviceshould be used. The use of the latest edition of AWS D1.4D1.4M is recommended. The AWS D1.4/D1.4M Welding Codedescribes th
8、e proper selection of the filler metals, preheat/interpass temperatures, as well as, performance and procedurequalification requirements.1.6 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).1.7 The
9、 text of this specification references notes and footnotes that provide explanatory material. These notes and footnotes,excluding those in tables, shall not be considered as requirements of this specification.1.8 This specification is applicable for orders in either inch-pound units (Specification A
10、706) or in SI units SpecificationA706M.1.9 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 may not be exact equivalents; therefore, each system shall be usedindepe
11、ndently of the other. Combining values from the two systems may result in non-conformance with this specification.1.10 This specification does not purport to address all of the safety concerns, if any, associated with its use. It is theresponsibility of the user of this specification to establish ap
12、propriate safety and health practices and determine the applicabilityof regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2A6/A6M Specification for General Requirements for Rolled Structural Steel Bars, Plates, Shapes, and Sheet Piling1 This specification is under the jur
13、isdiction 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 September 2015March 2016. Originally approved in 1974. Last previous edition approved
14、 in 20142015as A706/A706M 14.A706/A706M 15. DOI: 10.1520/A0706_A0706M-15.10.1520/A0706_A0706M-16.2 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 Docume
15、nt Summary page on the ASTM website.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 possible to adequately depict all changes accurately, ASTM rec
16、ommends 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 standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C
17、700, West Conshohocken, PA 19428-2959. United States1A370 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 SteelA615/A615M Specification for Deformed and Plain Carbon-St
18、eel Bars for Concrete ReinforcementA700 Guide for Packaging, Marking, and Loading Methods for Steel Products for ShipmentA751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel ProductsE29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifica
19、tionsE290 Test Methods for Bend Testing of Material for Ductility2.2 AWS Standard:3AWS D1.4D1.4M Structural Welding CodeReinforcing Steel2.3 U.S. Military Standard:4MIL-STD-129 Marking for Shipment and Storage2.4 U.S. Federal Standard:4Fed. Std. No. 123 Marking for Shipment (Civil Agencies)3. Termin
20、ology3.1 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 andrelated construction.3.1.2.1 DiscussionThe surface of
21、the bar is provided with lugs or protrusions that inhibit longitudinal movement of the bar relative to the concretesurrounding the bar in such construction. The lugs or protrusions conform to the provisions of this specification.3.1.3 plain bar, nsteel bar without protrusions.3.1.4 rib, nlongitudina
22、l protrusion on a deformed bar.3 Available from American Welding Society (AWS), 8669 NW 36 Street, #130, Miami, FL 33166-6672, http:/www.aws.org.4 Available from Standardization Documents Order Desk, DODSSP, Bldg. 4, Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http:/www.dodssp.daps.mil
23、.TABLE 1 Deformed Bar Designation Numbers, Nominal Weights Masses, Nominal Dimensions, and Deformation RequirementsBarDesig-nationNo.Nominal Weight, lb/ftNominal Mass,kg/mNominal DimensionsA Deformation Requirements, in. mmDiameter,in. mmCross-Sectional Areain.2 mm2Perimeter,in. mmMaximum AverageSpa
24、cingMinimum 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 0.028 0.71 0.2
25、39 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 90.0 0.790 20.
26、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 2.257 57.3 4.
27、00 2581 7.09 180.1 1.58 40.1 0.102 2.59 0.864 21.9A The 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 80 000 550A 100
28、 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 10A Tensile strength shall not be less than 1.25
29、times the actual yield strength.A706/A706M 1624. Ordering Information4.1 Orders for low-alloy steel bars for concrete reinforcement under this specification shall contain the following information:4.1.1 Quantity (weight) mass,4.1.2 Deformed or plain,4.1.3 Bar designation number (size) of deformed ba
30、rs, or nominal 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 additional requirements, including but not limited to, the following:4.2.1 Requirements for inspection (17.1),4.2.2 Spec
31、ial package marking requirements (20.2),4.2.3 Require bars in each bundle to be supplied from a single heat (16.1),4.2.4 Other special requirements, if any, and4.2.5 Optional requirements of Annex A1, if applicable.5. Material and Manufacture5.1 The bars shall be processed from properly identified h
32、eats 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 shall be determined in accordance with Test Methods, Practices, and Terminology A751.The manufacturer shall make the analysis on test samp
33、les taken preferably during the pouring of the heat. The percentages ofcarbon, manganese, phosphorus, sulfur, silicon, copper, nickel, chromium, molybdenum, and vanadium shall be determined.6.2 The chemical composition as shown by heat analysis shall be limited by the following:Element max, %CarbonM
34、anganese0.301.50Phosphorus 0.035Sulfur 0.045Silicon 0.506.3 Choice and use of alloying elements, combined with carbon, phosphorus, and sulfur to produce the mechanical propertiesprescribed in Table 2 and Table 3, shall be made by the manufacturer. Elements commonly used include manganese, silicon,co
35、pper, nickel, chromium, molybdenum, vanadium, columbium, titanium, and zirconium.6.4 The heat analysis shall be such as to provide a carbon equivalent (C.E.) not exceeding 0.55 % as calculated by the followingformula:C.E.5%C1%Mn6 1%Cu40 1%Ni20 1%Cr10 2%Mo50 2%V10 (1)6.5 Product (Check) Verification
36、AnalysisA product check analysis 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 substantially uniform distances. T
37、he deformations on opposite sides of thebar shall be similar in size, shape, and pattern.TABLE 3 Bend Test RequirementsBar Designation No. Pin Diameter for 180 Bend TestsGrade 60 420 Grade 80 5503, 4, 5 10, 13, 16 3dA 312dA6, 7, 8 19, 22, 25 4d 5d9, 10, 11 29, 32, 36 6d 7d14, 18 43, 57 8d 9dA d = no
38、minal diameter of specimen.A706/A706M 1637.2 The deformations shall be placed 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 reversealt
39、ernately in direction on each side, or those on one side shall be reversed in direction from those on the opposite side. Wherethe line of deformation 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 e
40、xceed 710 of the nominal diameterof the bar.7.4 The overall length of 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 beconside
41、red as the gap between these ends. The summation of the gaps shall not 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.
42、8. Measurements of Deformations8.1 The average spacing of deformations shall be determined by measuring the length of a minimum of 10 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 f
43、irst space to a corresponding point on a deformation after the last 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
44、 typical deformations.Determinations shall be based on three measurements per deformation, one at the center of the overall length and the other twoat the quarter points of the overall length.8.3 Insufficient height, insufficient circumferential coverage, or excessive spacing of deformations shall n
45、ot constitute cause forrejection unless it has been clearly established by determinations on each lot (see Note 1) 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 fewe
46、r than ten adjacent deformations on each side of the bar are measured.NOTE 1As 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 re
47、presented by the test specimens, shall conform to the requirements 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 of the beam or halt in the gauge of the tensi
48、le testing machine, where thesteel tested has a sharp-kneed or well-defined yield point.9.2.2 Where the steel does not have a well-defined yield point, the yield strength shall be determined by the offset method (0.2 %offset) as described in Test Methods and Definitions A370.9.3 When material is furnished in coils, the test specimen shall be taken from the coil and straightened prior to placing it in thejaws of the tensile testing machine. (See Note 2.)NOTE 2Straighten the test specimen to avoid formation of local sharp bends and to minimize cold work. Insufficient straig
