1、Designation: A955/A955M 17A955/A955M 17aStandard Specification forDeformed and Plain Stainless-Steel Bars for ConcreteReinforcement1This standard is issued under the fixed designation A955/A955M; 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.1. Scope*1.1 This specification covers deformed and plain stainless-steel bars for concrete reinforcement
3、 in cut lengths and coils used inapplications requiring resistance to corrosion or controlled magnetic permeability. The standard sizes and dimensions of deformedbars and their numerical designation shall be those listed in Table 1. The text of this specification references notes and footnoteswhich
4、provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered asrequirements of the specification.1.1.1 Supplementary requirement (S1) of an optional nature is provided. It shall apply only when specified by the purchaser.In order to obtain a
5、 controlled magnetic permeability product, steel conforming to Supplementary Requirement S1 should beordered.1.2 The chemical composition of the stainless steel alloy shall be selected for suitability to the application involved byagreement between the manufacturer and the purchaser. This is an impo
6、rtant consideration in achieving the desired corrosionresistance or controlled magnetic permeability, or both, because these properties are not provided by all stainless steels.NOTE 1The alloys shown in Table 2 have found the most use in North America. Other alloys may also provide desired propertie
7、s; consult with themanufacturer for stainless steel alloy properties and availability.1.3 Requirements for the relative deformation area of three-sided deformed bars are contained in Annex A4.1.4 Bars are of two minimum yield strength levels, namely, 60 000 420 MPa and 75 000 psi 520 MPa, designated
8、 as Grade60 420 and Grade 75 520, respectively.1.5 Plain bars in sizes up to and including 2 in. 50.8 mm in diameter in coils or cut lengths, when ordered, shall be furnishedunder this specification in Grade 60 420 and Grade 75 520, respectively. Bending properties, when required, shall be byagreeme
9、nt between the manufacturer and purchaser. Requirements providing for deformations and marking shall not be applicableto plain bars.1.6 Weldability of most When stainless steel compositions is generally good, however, pre-weld or post-weld procedures, orboth, are necessary. Where material is is to b
10、e welded, use a welding procedure suitable for the chemical composition and intendeduse or service shall be used. Retesting of physical properties should be considered following welding procedures depending uponthe steel composition and welding operation involved. service.NOTE 2It is recommended tha
11、t the user consult the manufacturer for information available from the Nickel Development Institute (NIDI) (Toronto,Canada). Welding of stainless steel reinforcement would occur after shipment from the producer. Structural welding should be performed in accordancewith the latest edition of AWS D1.6/
12、D1.6M, any other internationally accepted stainless steel welding code, or a procedure suggested by the materialproducer. AWS D1.6/D1.6M describes the proper selection of the filler metals, temperature control, as well as, performance, procedure qualification andinspection requirements.1.7 This spec
13、ification is applicable for orders in either inch-pound units (as Specification A955) or in SI units (as SpecificationA955M).1.8 The values stated in either inch-pound or SI units are to be regarded separately as standard. Within the text, the SI units areshown in brackets. The values stated in each
14、 system are not exact equivalents; therefore, each system shall be used independentlyof the other. Combining values from the two systems may result in nonconformance with the standard.1 This specification is under the jurisdiction ofASTM Committee A01 on Steel, Stainless Steel and RelatedAlloys and
15、is the direct responsibility of Subcommittee A01.05on Steel Reinforcement.Current edition approved March 15, 2017Sept. 1, 2017. Published April 2017September 2017. Originally approved in 1996. Last previous edition approved in 20162017as A955/A955M 16a.A955/A955M 17. DOI: 10.1520/A0955_A0955M-17.10.
16、1520/A0955_A0955M-17A.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 recommends that u
17、sers 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 C700, West Cons
18、hohocken, PA 19428-2959. United States1TABLE 1 Deformed Bar Designation Numbers, Nominal Weights Masses, Nominal Dimensions, and Deformation RequirementsBarDesignationNo.Nominal Weight, lb/ft Nominal Mass,kg/mA Nominal DimensionsB Deformation Requirements, in. mm400 Series;Duplex Alloys 300 SeriesDi
19、ameter, in.mmCross-SectionalArea, in.2 mm2Perimeter, in.mmMaximumAverage SpacingMinimumAverage HeightMaximum Gap per SideCTwo-SidedBarThree-SidedBar3 10 0.374 0.556 0.378 0.562 0.375 9.5 0.11 71 1.178 29.9 0.262 6.7 0.015 0.38 0.143 3.6 0.097 2.54 13 0.679 1.011 0.686 1.021 0.500 12.7 0.20 129 1.571
20、 39.9 0.350 8.9 0.020 0.51 0.191 4.9 0.129 3.35 16 1.048 1.559 1.058 1.575 0.625 15.9 0.31 199 1.963 49.9 0.437 11.1 0.028 0.71 0.239 6.1 0.162 4.16 19 1.495 2.225 1.511 2.248 0.750 19.1 0.44 284 2.356 59.8 0.525 13.3 0.038 0.97 0.286 7.3 0.194 4.97 22 2.038 3.032 2.059 3.064 0.875 22.2 0.60 367 2.7
21、49 69.8 0.612 15.5 0.044 1.12 0.334 8.5 0.226 5.88 25 2.685 3.995 2.713 4.037 1.000 25.4 0.79 510 3.142 79.8 0.700 17.8 0.050 1.27 0.383 9.7 0.259 6.69 29 3.396 5.053 3.441 5.106 1.128 28.7 1.00 645 3.544 90.0 0.790 20.1 0.056 1.42 0.431 10.9 0.292 7.410 32 4.312 6.416 4.358 6.484 1.270 32.3 1.27 81
22、9 3.990 101.3 0.889 22.6 0.064 1.63 0.487 12.4 0.329 8.311 36 5.296 7.880 5.352 7.964 1.410 35.8 1.56 1006 4.430 112.5 0.987 25.1 0.071 1.80 0.540 13.7 0.365 9.314 43 7.64 11.37 7.72 11.49 1.693 43.0 2.25 1452 5.32 135.1 1.185 30.1 0.085 2.16 0.648 16.5 0.438 11.118 57 13.59 20.22 13.72 20.43 2.257
23、57.3 4.00 2581 7.09 180.1 1.58 40.1 0.102 2.59 0.864 21.9 0.584 14.8A The 400 and Duplex-Alloy Series is based on a density of 489.59 lb/ft3 7833.4 kg/m3 .The 300 Series is based on a density of 494.78 lb/ft3 7916.5 kg/m3. Density varies with alloy content which may result in a variationof several p
24、ercent.B The nominal dimensions of a deformed bar are equivalent to those of a round bar having the same weight mass per foot metre as the deformed bar.C The maximum gap (measured as a chord) between the ends of the deformations shall not exceed 25 % n of the nominal perimeter of the bar, where n is
25、 the number of longitudinal gaps or longitudinal ribs aroundthe perimeter of the bar.A955/A955M17a21.9 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 ap
26、propriate safety safety, health and healthenvironmentalpractices and determine the applicability of regulatory limitations prior to use.1.10 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles
27、for the Development of International Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2A6/A6M Specification for General Requirements for Rolled Structural Steel Bars, Plates, Shapes, and
28、Sheet PilingA276 Specification for Stainless Steel Bars and ShapesA342/A342M Test Methods for Permeability of Weakly Magnetic MaterialsA370 Test Methods and Definitions for Mechanical Testing of Steel ProductsA510 Specification for General Requirements for Wire Rods and Coarse Round Wire, Carbon Ste
29、elA510M Specification for General Requirements for Wire Rods and Coarse Round Wire, Carbon Steel (Metric) (Withdrawn2011)3A751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel ProductsC192/C192M Practice for Making and Curing Concrete Test Specimens in the LaboratoryE29 Practi
30、ce for Using Significant Digits in Test Data to Determine Conformance with SpecificationsE290 Test Methods for Bend Testing of Material for DuctilityG15 Terminology Relating to Corrosion and Corrosion Testing (Withdrawn 2010)32.2 U.S. Military Standard:4MIL-STD-129 Marking for Shipment and Storage2.
31、3 U.S. Federal Standard:4Fed. Std. No. 123 Marking for Shipment (Civil Agencies)2.4 AWS Standard:5AWS D1.6/D1.6M Structural Welding Code Stainless Steel3. Terminology3.1 Definitions of Terms Specific to This Specification:3.1.1 deformations, ntransverse protrusions on a deformed bar.3.1.2 deformed b
32、ar, nsteel bar with protrusions; a bar that is intended for use as reinforcement in reinforced concreteconstruction.3.1.2.1 Discussion2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume infor
33、mation, 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 Standardization Documents Order Desk, DODSSP, Bldg. 4, Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http:/www.d
34、odssp.daps.mil.5 Available from American Welding Society (AWS), 8669 NW 36 St., #130, Miami, FL 33166-6672, http:/www.aws.org.TABLE 2 Chemical Requirements of Typical AlloysAUNSDesignationComposition %Type Carbon Manganese Phosphorus Sulfur Silicon Chromium Nickel Molybdenum NitrogenS24000 XM-29 0.0
35、8 11.50-14.500.060 0.030 1.00 17.00-19.002.25-3.750.20-0.40S24100 XM-28 0.15 11.00-14.000.060 0.030 1.00 16.50-19.000.50-2.500.20-0.45S30400 304 0.08 2.00 0.045 0.030 1.00 18.00-20.008.00-10.500.10S31603 316L 0.03 2.00 0.045 0.030 1.00 16.00-18.0010.00-14.002.00-3.00 0.10S31653 316LN 0.03 max 2.00 0
36、.045 0.030 1.00 16.00-18.0010.00-14.002.00-3.00 0.10-0.16S31803 0.03 2.00 0.030 0.020 1.00 21.00-23.004.50-6.502.50-3.50 0.08-0.20A Maximum, unless otherwise indicated.A955/A955M 17a3The surface of the bar is provided with protrusions that inhibit longitudinal movement of the bar relative to the con
37、cretesurrounding the bar in such construction. The protrusions conform to the provisions of this specification.3.1.3 plain bar, nsteel bar without protrusions.3.1.4 relative deformation area, nthe ratio of the deformation bearing area (projected deformation area normal to the bar axis)to the shearin
38、g area (nominal bar perimeter times the average spacing of the deformations.3.1.5 rib, nlongitudinal protrusion on a deformed bar.3.1.6 stainless steel, na steel that contains 11 % or more chromium.3.1.7 three-sided bar, ndeformed steel bar with three rows of transverse deformations.3.1.8 two-sided
39、bar, ndeformed steel bar with two rows of transverse deformations.4. Ordering Information4.1 It shall be the responsibility of the purchaser to specify all requirements that are necessary for material ordered to thisspecification. Such requirements shall include but are not limited to the following:
40、4.1.1 Quantity (weight) mass,4.1.2 Name of material (deformed and plain stainless steel bars for concrete reinforcement),4.1.3 Chemical composition (stainless steel alloy),4.1.4 Heat treatment condition,4.1.5 Size,4.1.6 Cut lengths or coils,4.1.7 Deformed or plain,4.1.8 Grade (strength level),4.1.9
41、Descaling method and finish,4.1.10 Requirements for inspection (20.1),4.1.11 Packaging (see Section 24),4.1.12 Supplementary requirement (if desired), and4.1.13 ASTM designation and year of issue.5. Materials and Manufacture5.1 The bars shall be rolled from properly identified heats of mold or stran
42、d cast steel.5.2 Bars shall be furnished in one of the following heat treatment conditions, as shown in Specification A276, and as neededto meet the requirements of this specification.5.2.1 Annealed (A).5.2.2 Hot rolled (HR).5.2.3 Strain hardened (B).NOTE 3The mechanical properties of the material r
43、esult from the heat treat condition of the material. Any further heat treatment of the material mayalter those properties and affect their ability to meet the specified strength level. No re-treatment should be imposed without retesting to the requirementsof this specification.6. Chemical Compositio
44、n6.1 The chemical analysis of each heat of steel shall be determined in accordance with Test Methods, Practices, andTerminology A751. The manufacturer shall make the analysis on test samples taken preferably during the pouring of the heat.6.2 The chemical composition agreed to between manufacturer a
45、nd purchaser shall conform to the requirements in Table 1 ofSpecification A276.7. Requirements for Deformations7.1 Deformations shall be spaced along the bar at substantially uniform distances. The deformations on all sides of the bar shallbe similar in size, shape, and pattern.7.2 The deformations
46、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 of from 45 to 70 inclusive, the deformations on atwo-sided bar shall alternately reverse in direction on each side or tho
47、se on one side shall be reversed in direction from those onthe opposite side. The deformations on three-sided bars shall reverse on one of the three sides (see Fig. 1). Where the line ofdeformation is over 70, a reversal in direction is not required.7.3 The average spacing or distance between deform
48、ations on each side of the bar shall not exceed seven tenths of the nominaldiameter of 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 25 %n, where n is the number of longitudinal gaps or longitudina
49、l ribs, of the nominal perimeter of the bar.WhereA955/A955M 17a4the ends of the deformations terminate in a longitudinal rib, the width of the longitudinal rib shall be considered as the gap betweenthese ends. The summation of the gaps shall not exceed 25 % of the nominal perimeter of the bar. The nomina
