1、Designation: A951/A951M 11A951/A951M 14Standard Specification forSteel Wire for Masonry Joint Reinforcement1This standard is issued under the fixed designation A951/A951M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, the year of
2、 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 masonry joint reinforcement fabricated from cold-drawn steel wire. Joint reinforcement con
3、sistsof longitudinal wires welded to cross wires.1.2 The values stated in either SIinch-pound units or inch-poundSI units are to be regarded separately as standard. Within thetext, the SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each syst
4、em shallbe used independently of the other. Combining values from the two systems may result in non-conformance with the standard.2. Referenced Documents2.1 ASTM Standards:2A82/A82M Specification for Steel Wire, Plain, for Concrete Reinforcement (Withdrawn 2013)3A152 Specification for Wrought Iron R
5、ivets and Rivet Rounds (Withdrawn 1972)3A185/A185M Specification for Steel Welded Wire Reinforcement, Plain, for Concrete (Withdrawn 2013)3A496/A496M Specification for Steel Wire, Deformed, for Concrete Reinforcement (Withdrawn 2013)3A580/A580M Specification for Stainless Steel WireA641/A641M Specif
6、ication for ZincCoated (Galvanized) Carbon Steel WireA1064/A1064M Specification for Carbon-Steel Wire and Welded Wire Reinforcement, Plain and Deformed, for Concrete3. Ordering Information3.1 It shall be the responsibility of the purchaser to specify all requirements that are necessary for the manuf
7、acture and deliveryof the wire under this specification. Such requirements to be considered include, but are not limited to, the following:3.1.1 Quantity (metres linear feet),(linear feet metres),3.1.2 Type (truss, ladder),3.1.3 Width (nominal thickness of masonry wall),3.1.4 Wire size and wire spec
8、ification,3.1.5 Finish (see Section 6),3.1.6 Packaging (see Section 12), and3.1.7 ASTM designation number and year of issue.4. Materials and Manufacture4.1 Wire used in the manufacture of masonry joint reinforcement shall be round and shaped and conform to the applicableprovisions of Specifications
9、A82/A82MA580/A580M, A1064/A1064M, orType 304, A580/A580M, Typeor A1064/A1064M 304,except as modified herein.NOTE 1Specifications A82/A82M, A185/A185M, and A496/A496M have been replaced by Specification A1064/A1064M.4.2 Masonry joint reinforcement shall be assembled by automatic machines or by other
10、suitable mechanical means that willassure accurate spacing and alignment of all members of the finished product.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 Reinforcemen
11、t.Current edition approved Oct. 1, 2011May 1, 2014. Published October 2011May 2014. Originally approved in 1996. Last previous edition approved in 20042011 asA951/A951M 04.A951/A951M 11. DOI: 10.1520/A0951_A0951M-11. 10.1520/A0951_A0951M-14.2 For referencedASTM standards, visit theASTM website, www.
12、astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, 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.This document is not an ASTM stand
13、ard 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 users consult prior editions as appropriate. In all cases
14、 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 Conshohocken, PA 19428-2959. United States14.3 Longitudinal
15、and cross wires shall be securely connected at every intersection by an electric-resistance welding process thatincludes both fusion welding together with applied pressure to join the materials.4.4 Longitudinal wires shall be deformed. One set of two deformations shall occur around the perimeter of
16、the wire at amaximum spacing of 0.7 times the diameter or width of the wire, but not less than eight sets per 25 mm 1 in.1 in. 25 mm oflength.NOTE 1Wire used for joint reinforcement is knurled to form deformations and as such it does not come under the deformation requirements inSpecificationsSpecif
17、ication A496/A496M or A1064/A1064M.5. Mechanical Requirements5.1 Tensile PropertiesWire used in the fabrication of masonry joint reinforcement shall conform to the requirements of Table1 based on nominal area of the wire.5.2 Tension Tests:5.2.1 Tension tests shall be made on individual wires cut fro
18、m the finished product and tested either across or between the welds.No less than 50 % shall be across welds.5.2.2 Tension tests across a weld shall have the welded joint located approximately at the center of the wire being tested.5.2.3 Tensile strength shall be the average of four test values dete
19、rmined by dividing the maximum test load by the specifiednominal cross-sectional area of the wire.5.3 Reduction of AreaThe ruptured section of the tensile specimen is measured to determine this property. The measurementshall be made only when rupture has occurred at a sufficient distance from the ce
20、nter of the weld to permit an accurate measurementof the fractured section. Additional testing is permitted when a suitable ruptured section is not obtained from the initial test. Thewire shall meet the minimum reduction of area requirements of Table 1.5.4 Weld Shear StrengthThe weld shear strength
21、in Newtonspounds-force shall not be less than 172 25 000 multiplied by thespecified nominal area in square millimetres or in pounds-force of the larger wire in square inches in Newtons shall not be lessthan 25 000 172 multiplied by the specified nominal area of the larger wire in square inches. mill
22、imeters.NOTE 2Since industry practice is to use butt welds in the manufacture of joint reinforcement, the weld shear strength in pounds-force is prescribedas 25 000 times the area of the larger wire rather than 35 000 times the area of the larger wire.5.5 Weld Shear Strength Tests:5.5.1 Test specime
23、ns shall be obtained from the finished product by cutting a section of longitudinal wire that includes one weld.5.5.2 Weld shear strength tests shall be conducted using a fixture of such design as to prevent rotation of the cross wire. Thecross wire shall be placed in the anvil of the testing device
24、 which is secured in the tensile machine and the load then applied tothe longitudinal wire.5.5.3 Weld shear strength shall be the average test load in Newtons poundspounds Newtons of four test specimens selectedat random.5.6 Bend Tests:5.6.1 Test specimens shall be obtained from the fabricated produ
25、ct by cutting a section of longitudinal wire without welds.5.6.2 The test specimens shall be bent at room temperature through 180 around a pin, the diameter of which is equal to thenominal diameter of the specified wire. Shaped wires shall be placed on the pin so that the minimum dimension is perpen
26、dicularto the axis of the pin.5.6.3 The specimen shall not break nor shall there be visible cracks of the base metal on the outside diameter of the bend.6. Other Requirements6.1 When corrosion protection of joint reinforcement is provided, it shall be in accordance with one of the following:6.1.1 Mi
27、ll GalvanizedZinc coated, in accordance with the hot-dip method of Specification A641/A641M, with a minimum of30 g/m0.1 2 0.1 oz per ft2 30 g/m2 of surface area. It shall be permissible to apply the coating before fabrication.6.1.2 Hot-Dip GalvanizedZinc coated, by the hot-dip method, in accordance
28、with Specification A152, Class B (average zinccoating of 458 g/m1.50 2 1.50 oz per ft2 458 g/m2). The coating shall be applied after fabrication.7. Dimensions and Tolerances7.1 Longitudinal WiresThe minimum size of longitudinal wires shall be MW7 W1.1.W1.1 MW7.TABLE 1 Tension Test RequirementsTensil
29、e strength, min, MPa ksi 550 80Tensile strength, min, psi MPa 80 000 550Yield strength, min, MPa ksi 485 70Yield strength, min, psi MPa 70 000 485Reduction of area, min, % 30A951/A951M 1427.2 Cross WiresThe minimum size of cross wires shall be MW7 W1.1.W1.1 MW7. Cross wires shall not project beyondt
30、he outside longitudinal wires by more than 3 mm 18 in. in. 3 mm.7.3 WidthThe width of joint reinforcement is defined as the out-to-out distance of outside longitudinal wires. Width shall notvary by more than 3 mm 18 in.in. 3 mm from the manufacturers specified standard dimension. Width shall be meas
31、ured asfollows:7.3.1 Ladder Type Joint ReinforcementAt opposite weld points, and7.3.2 Truss Type Joint ReinforcementFrom a weld point on one longitudinal wire perpendicular to a point on the opposite wirebetween adjacent weld points.7.4 LengthThe length of pieces of joint reinforcement shall not var
32、y by more than 13 mm 12 in.in. 3 mm from the specifiedlength.7.5 Dimensions:7.5.1 The required dimensions shall be measured on three samples of joint reinforcement prior to galvanizing or on threesamples from which the galvanizing has been removed.7.5.2 Measure the dimensions of both longitudinal an
33、d cross wires to the nearest 0.030 mm 0.001 in.0.001 in. 0.030 mm.7.5.3 Measure the gaps between the ends of deformations around the circumference of the wire to the nearest 0.030 mm 0.001in.0.001 in. 0.030 mm.8. Number of Tests8.1 Number of TestsOne set of each test described herein shall be perfor
34、med for each 91 500 metres 300 000 linear feet300000 linear feet 91 500 metres of joint reinforcement, but not less than one set each week.9. Inspection9.1 The inspector representing the purchaser shall have free entry at all times, while work on the contract of the purchaser isbeing performed, to a
35、ll parts of the manufacturers facilities that concern the manufacture of the material ordered. Themanufacturer shall afford the inspector all reasonable facilities to assure that the material is being furnished in accordance with thisspecification.9.2 Except for yield strength, all tests and inspect
36、ions shall be made at the place of manufacture prior to shipment, unlessotherwise specified. Such tests shall be conducted so as not to interfere unnecessarily with the operation of the facilities.9.3 If the purchaser considers it desirable to determine compliance with the strength requirements of S
37、pecificationsSpecificationA82/A82M or A1064/A1064M, tension tests shall be made by a recognized laboratory, or by the wire supplier, observed by thepurchasers representative if desired, provided such tests do not interfere unnecessarily with manufacturing operations.10. Rejection and Rehearing10.1 M
38、aterial that does not meet the requirements of this specification, shall be subject to rejection. Unless otherwise specified,any rejection shall be reported to the manufacturer within five days from the time of selection of test specimens.10.2 In case a specimen fails to meet the tension or bend tes
39、t, the material shall not be rejected until two additional specimenstaken from other wires in the same bundle have been tested. The material shall be considered as meeting the specification in respectto any prescribed tensile property, provided the tested average for the three specimens, including t
40、he specimen originally tested,is equal to or exceeds the required minimum for the particular property in question, and further provided that none of the threespecimens develops less than 80 % of the required minimum for the tensile property in question. The material shall be consideredas meeting thi
41、s specification in respect to bend test requirements provided both additional specimens satisfactorily pass theprescribed bend test.10.3 Any material that is found not to meet the requirements of this specification subsequent to its acceptance at themanufacturers facilities shall be subject to rejec
42、tion and the manufacturer shall be notified promptly.10.4 Welded joints shall withstand normal shipping and handling without becoming broken, but the presence of broken welds,regardless of cause, shall not constitute cause for rejection unless the number of broken welds per bundle exceeds 1 % of the
43、 totalnumber of joints in a bundle.10.5 In the event of rejection because of failure to meet the weld shear requirements, four additional specimens shall be takenfrom four different bundles and tested in accordance with 5.5. If the average of all the weld shear tests performed does not meetthe requi
44、rement, the material shall be rejected.10.6 In the event of rejection because of failure to meet the requirements for dimensions, the amount of material rejected shallbe limited to those bundles which fail to meet this specification.10.7 Rust, surface seams, or surface irregularities will not be cau
45、se for rejection provided the minimum dimensions,cross-sectional area, and tensile properties of a hand wire brushed test specimen are not less than the requirements of thisspecification.A951/A951M 14310.8 RehearingRejected materials shall be preserved for a period of at least two weeks from the dat
46、e of inspection, duringwhich time the manufacturer shall have the option to make claim for a rehearing and retesting.11. Certification11.1 If outside inspection is waived, a manufacturers certification that the material has been tested in accordance with andmeets the requirements of this specificati
47、on shall be the basis of acceptance of the material. The certification shall include thespecification number, year-date of issue, and revision letter, if any.11.2 A material test report, certificate of inspection, or similar document printed from or used in electronic form from anelectronic data int
48、erchange (EDI) transmission shall be regarded as having the same validity as a counterpart printed in thecertifiers facility. The content of the EDI transmitted document must meet the requirements of the invokedASTM standard(s) andconform to any existing EDI agreement between the purchaser and the s
49、upplier. Notwithstanding the absence of a signature, theorganization submitting the EDI transmission is responsible for the content of the report.NOTE 3The industry definition as invoked here is: EDI is the computer-to-computer exchange of business information in a standard format such asANSI ASC X12.12. Packaging and Marking12.1 Joint reinforcement shall be assembled in bundles containing 75 to 150 metres 250 to 500 linear feet250 to 500 linearfeet 75 to 150 metres and sec
