1、Designation: A706/A706M 09bA706/A706M 13Standard Specification forLow-Alloy Steel Deformed and Plain 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
2、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 for use by agencies of the Department of Defense.1. Scope*1.1 GeneralThis
3、 specification covers deformed and plain low-alloy steel bars in cut lengths or coils for concrete reinforcementintended for applications where restrictive mechanical properties and chemical composition are required for compatibility withcontrolled tensile property applications or to enhance weldabi
4、lity. The standard sizes and dimensions of deformed bars and theirnumber designations are given in Table 1. The text of this specification references notes and footnotes that provide explanatorymaterial. These notes and footnotes, excluding those in tables, shall not be considered as requirements of
5、 this specification.1.2 GradeBars are of two minimum yield strength levels: namely, 60 000 psi 420 MPa and 80 000 550, designated asGrade 60 420 and Grade 80 550, respectively.NOTE 1Bars designated as Grade 80 550, which were introduced in the A706/A706M 09a revision, may be outside consideration of
6、 consensusdesign codes and specifications.1.3 Plain bars, in sizes 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 diam
7、eterdeformed bar size shall apply.1.4 Controlled Tensile PropertiesThis specification limits mechanical 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 equivale
8、nt (6.4) to enhance the weldability of thematerial. When steel is to be welded, a welding procedure suitable for the chemical composition and intended use or service shouldbe used. The use of the latest edition of AWS D1.4/D1.4M is recommended. This document describes the proper selection of thefill
9、er metals, preheat/interpass temperatures, as well as, performance and procedure qualification 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 4.1.9).1.7 This specification is applicable for
10、orders in either inch-pound units (Specification A706) or in SI units SpecificationA706M.1.8 The values stated in either inch-pound units or SI units are to be regarded as standard. Within the text, the SI units are shownin brackets. The values stated in each system are not exact equivalents; theref
11、ore, each system must be used independently of theother. Combining values from the two systems may result in nonconformance with this specification.1.9 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this s
12、tandard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations 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 specifi
13、cation is under the jurisdiction ofASTM Committee A01 on Steel, Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee A01.05on Steel Reinforcement.Current edition approved Nov. 15, 2009Oct. 1, 2013. Published December 2009November 2013. Originally approved in 1974. Last
14、previous edition approved in 2009 asA706/A706M 09a.A706/A706M 09b. DOI: 10.1520/A0706_A0706M-09B. 10.1520/A0706_A0706M-13.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refe
15、r to the standards Document 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 cha
16、nges accurately, ASTM recommends 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 Ba
17、rr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1A370 Test Methods and Definitions for Mechanical Testing of Steel ProductsA510 Specification for General Requirements for Wire Rods and Coarse Round Wire, Carbon SteelA510M Specification for General Requirements for Wire R
18、ods and Coarse Round Wire, Carbon Steel (Metric) (Withdrawn2011)3A615/A615M Specification for Deformed and Plain Carbon-Steel Bars for Concrete ReinforcementA700 Practices for Packaging, Marking, and Loading Methods for Steel Products for ShipmentA751 Test Methods, Practices, and Terminology for Che
19、mical Analysis of Steel ProductsE29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications2.2 AWS Standard:4AWS D1.4/D1.4M Structural Welding CodeReinforcing Steel2.3 Government Standard:5MIL-STD-129 Marking for Shipment and Storage2.4 U.S. Federal Standard:5
20、Fed. Std. No. 123 Marking for Shipment (Civil Agencies)3. Terminology3.1 Definitions of Terms Specific to This Standard: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 concret
21、e andrelated construction.3.1.2.1 DiscussionThe surface of 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
22、bar, nsteel bar without protrusions.3.1.4 rib, nlongitudinal protrusions on a deformed bar.3 The last approved version of this historical standard is referenced on www.astm.org.4 Available from American Welding Society (AWS), 550 NW LeJeune Rd., Miami, FL 33126, http:/www.aws.org.5 Available from St
23、andardization Documents 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 RequirementsBarDesig-nationNo.Nominal Weight, lb/ftNominal Ma
24、ss,kg/mNominal DimensionsA Deformation Requirements, in. mmDiameter,in. mmCross-Sectional Areain.2 mm2Perimeter,in. mmMaximum 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 0.99
25、4 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 1.502 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 8.5
26、8 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 0.431 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
27、.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 7.09 180.1 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 mas
28、s per foot metre as the deformed bar.TABLE 2 Tensile RequirementsGrade 60 420 Grade 80 550Tensile strength, min, psi MPa 80 000 550A 100 000 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
29、, 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 times the actual yield strength.A706/A706M 1324. Ordering Information4.1 It shall be the responsibility of the purchaser to specify all requirements that are necess
30、ary for material ordered to thisspecification. Such requirements shall include, but are not limited to, the following:4.1.1 Quantity (weight) mass,4.1.2 Name of material (low-alloy steel deformed and plain bars for concrete reinforcement),4.1.3 Size,4.1.4 Grade,4.1.5 Cut lengths or coils,4.1.6 Defor
31、med or plain,4.1.7 Packaging (see Section 17), and4.1.8 ASTM designation and year of issue. issue, and4.1.9 Optional requirements of Annex A1, if applicable.5. Material and Manufacture5.1 The bars shall be processed from properly identified heats of mold-cast or strand-cast steel.5.2 The steel shall
32、 be made by one of the following processes: electric-furnace, basic-oxygen, or open-hearth.6. Chemical Composition6.1 The chemical analysis of each heat shall be determined in accordance with Test Methods A751. The manufacturer shallmake the analysis on test samples taken preferably during the pouri
33、ng of the heat. The percentages of carbon, 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, %CarbonManganese0.301.50Phosphorus 0.035Sulfu
34、r 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,copper, nickel, chromium, molybdenum, v
35、anadium, 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 AnalysisA product check analysis made
36、 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. The deformations on opposite sides of
37、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 = nominal diameter of specimen.A706/A706M
38、 1337.2 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 reversealternately in direction on each side, o
39、r 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 exceed 710 of the nominal diameterof t
40、he 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 beconsidered as the gap between these ends. Th
41、e 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 1.8. Measurements of Deformations8.1 Th
42、e 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 first space to a corresponding point o
43、n 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 typical deformations.Determinations
44、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 not constitute cause forrejection unle
45、ss it has been clearly established by determinations on each lot (see Note 21) 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 fewer than ten adjacent deformations on
46、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. Mechanical Requirements9.1 Tensile Properties:9.1.1 The material, as represente
47、d by the test specimens, shall conform to the requirements for tensile properties prescribed inTable 2. The yield strength or yield point shall be determined by one of the following methods:9.1.1.1 Offset method (0.2 % offset) as described in Test Methods and Definitions A370. A second tensile test
48、result shall alsobe required. In addition, the stress corresponding to a tensile strain of 0.0035 shall be a minimum of 60 000 psi 420 MPa forGrade 60 420 and a minimum of 80 000 psi 550 MPa for Grade 80 550. The value of stress corresponding to a tensile strainof 0.0035 shall be reported in the test report (13.1.3).9.1.1.2 By the drop of the beam or halt in the gage of the tensile testing machine, where the steel tested has a sharp-kneed orwell-defined type of yield point.9.1.2 The percentage of elongation shall be as prescribed in Table 2.9.2 Bending Propertie
