1、Designation: A706/A706M 13A706/A706M 14Standard Specification forLow-Alloy Steel Deformed and Plain Low-Alloy Steel Barsfor Concrete Reinforcement1This standard is issued under the fixed designation A706/A706M; the number immediately following the designation indicates the yearof original adoption o
2、r, 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 for use by agencies of the U.S. Department of Defense.1. S
3、cope*1.1 GeneralThis specification covers deformed and plain low-alloy steel bars in cut lengths orand coils for concretereinforcement intended for applications where restrictive mechanical properties and chemical composition are required forcompatibility with controlled tensile property application
4、s or to enhance weldability. The standard sizes and dimensions ofdeformed bars and their number designations are given in Table 1. The text of this specification references notes and footnotes thatprovide explanatory material. These notes and footnotes, excluding those in tables, shall not be consid
5、ered as requirements of thisspecification.1.2 GradeBars are of two minimum yield strength levels: namely, 60 000 psi 420 MPa and 80 000 550, psi 550 MPa,designated as Grade 60 420 and Grade 80 550, respectively.1.3 Plain bars, in sizes up to and including 212 in. 63.5 mm in diameter in coils or cut
6、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 deformations and marking shall not be applicable.1.4 Controlled Tensi
7、le PropertiesThis specification limits mechanicaltensile properties (Table 2) to provide the desiredyield/tensile properties for controlled tensile property applications.1.5 WeldingThis specification limits chemical composition (6.2) and carbon equivalent (6.4) to enhance the weldability of themater
8、ial. 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 ofAWS D1.4/D1.4M is recommended. This document TheAWS D1.4/D1.4M WeldingCode describes the proper selection of the filler metals, p
9、reheat/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 4.1.94.2.3).1.7 The text of this specification references not
10、es 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 A706) or in SI units SpecificationA706M.1.9
11、 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 aremay not be exact equivalents; therefore, each system mustshall be usedindependently of the other. Combining val
12、ues from the two systems may result in nonconformancenon-conformance with thisspecification.1.10 This standardspecification does not purport to address all of the safety concerns, if any, associated with its use. It is theresponsibility of the user of this standardspecification to establish appropri
13、ate safety and health practices and determine theapplicability of regulatory limitations prior to use.1 This specification 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
14、edition approved Oct. 1, 2013April 1, 2014. Published November 2013May 2014. Originally approved in 1974. Last previous edition approved in 20092013 asA706/A706M 09b.A706/A706M 13. DOI: 10.1520/A0706_A0706M-13.10.1520/A0706_A0706M-14.This document is not an ASTM standard and is intended only to prov
15、ide 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 recommends that users consult prior editions as appropriate. In all cases only the current versionof the
16、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 C700, West Conshohocken, PA 19428-2959. United States12. Referenced Documents2.1 ASTM Standards:2A6/A6M
17、 Specification for General Requirements for Rolled Structural Steel Bars, Plates, Shapes, and Sheet PilingA370 Test Methods and Definitions for Mechanical Testing of Steel ProductsA510A510/A510M Specification for General Requirements for Wire Rods and Coarse Round Wire, Carbon Steel, and AlloySteelA
18、510M Specification for General Requirements for Wire Rods 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 Shipmen
19、t (Withdrawn 2014)3A751 Test Methods, Practices, and Terminology for Chemical 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 U.S. Mili
20、tary 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 Standard:Specification:3.1.1 deformations, ntransverse protrusions on a deformed bar.3.1.2 deformed bar
21、, nsteel bar with protrusions; a bar that is intended for use as reinforcement in reinforced concrete andrelated construction.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information,
22、refer to the standards Document Summary page on the ASTM website.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., 8669 NW 36 Street, #130, Miami, FL 33126,33166-6672, http:/www.aws.org.5 Availab
23、le from Standardization 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/ft
24、Nominal Mass,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
25、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 1.502 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
26、 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 0.431 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.
27、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 7.09 180.1 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
28、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 100 000 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 Designa
29、tion 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 times the actual yield strength.A706/A706M 1423.1.2.1 DiscussionThe surface of the bar is provided with lugs or protrusions that inhibit longitudinal move
30、ment 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, nlongitudinal protrusions on a deformed bar.4. Ordering Information4.1 Orders for low-a
31、lloy 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 bars, or nominal diameter (size) of plain bars,4.1.4 Cut lengths or coils,4.1.5 Grade, and4
32、.1.6 ASTM designation and year of issue.4.2 It The purchaser shall be the responsibility of the purchaser to specify all requirements that are necessary for materialordered to this specification. Such requirements shall include, but are have the option to specify additional requirements, includingbu
33、t 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 Deformed or plain,4.2.1 Packaging (see Section Special package marking requirements (1720.2
34、),4.2.2 ASTM designation and year of issue, Other special requirements, if any, and4.2.3 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. The steel shall be made by anycommerc
35、ially accepted process.5.2 The steel shall 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 Methods, Practices, andTerminology A751. The manufact
36、urer shall make the analysis on test samples taken preferably during the pouring of the heat. Thepercentages of carbon, manganese, phosphorus, sulfur, silicon, copper, nickel, chromium, molybdenum, and vanadium shall bedetermined.6.2 The chemical composition as shown by heat analysis shall be limite
37、d by the following:Element max, %CarbonManganese0.301.50Phosphorus 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 com
38、monly used include manganese, silicon,copper, nickel, chromium, molybdenum, vanadium, columbium, titanium, and zirconium.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
39、6d 7d14, 18 43, 57 8d 9dA d = nominal diameter of specimen.A706/A706M 1436.4 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 Analysis
40、A 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. The defor
41、mations on opposite sides of thebar shall be similar in size, shape, and pattern.7.2 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, incl
42、usive, the deformations shall reversealternately 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 deformat
43、ions on each side of the bar shall not exceed 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 r
44、ib, the width of the rib shall beconsidered 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
45、 the requirements prescribed in Table 1.8. 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 o
46、n a deformation atthe beginning of the first 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 fro
47、m measurements made on not less than two 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 e
48、xcessive spacing of deformations shall not 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 fewer 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 o
