1、Designation: A951/A951M 14A951/A951M 16Standard 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 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
4、usedindependently of the other. Combining values from the two systems may result in non-conformance with the standard.2. Referenced Documents2.1 ASTM Standards:2A152 Specification for Wrought Iron Rivets and Rivet Rounds (Withdrawn 1972)3A580/A580M Specification for Stainless Steel WireA641/A641M Sp
5、ecification 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 m
6、anufacture and deliveryof the wire under this specification. Such requirements to be considered include, but are not limited to, the following:Orders forwire reinforcement under this Specification shall contain the following information:3.1.1 Quantity (linear feet metres),3.1.2 Type (truss, ladder),
7、3.1.3 Width (nominal thickness of masonry wall),3.1.4 Wire size and wire specification,3.1.5 Finish (see Section 6),3.1.6 Requirements for inspection (see Section 9),3.1.7 Packaging (see Section 12), and3.1.8 ASTM designation number and year of issue.4. Materials and Manufacture4.1 Wire used in the
8、manufacture of masonry joint reinforcement shall be round and shaped and conform to the applicableprovisions of Specifications A580/A580M, Type 304, or A1064/A1064M except as modified herein.4.2 Masonry joint reinforcement shall be assembled by automatic machines or by other suitable mechanical mean
9、s that willassure accurate spacing and alignment of all members of the finished product.4.3 Longitudinal 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
10、.4 Longitudinal wires shall be deformed. One set of two deformations shall occur around the perimeter of the wire at amaximum spacing of 0.7 times the diameter or width of the wire, but not less than eight sets per 1 in. 25 mm of length.1 This specification is under the jurisdiction ofASTM Committee
11、 A01 on Steel, Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee A01.05on Steel Reinforcement.Current edition approved May 1, 2014Jan. 15, 2016. Published May 2014January 2016. Originally approved in 1996. Last previous edition approved in 20112014 asA951/A951M 11.A9
12、51/A951M 14. DOI: 10.1520/A0951_A0951M-14.10.1520/A0951_A0951M-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 Document Summary page on the ASTM web
13、site.3 The last approved version of this historical standard is referenced on www.astm.org.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 possibl
14、e to adequately depict all changes 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 standardCopyri
15、ght ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1NOTE 1Wire used for joint reinforcement is knurled to form deformations and as such it does not come under the deformation requirements inSpecification A1064/A1064M.5. Mechanical Requirements5
16、.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 from the finished product and tested either across or between the
17、 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 determined by dividing the maximum test load by the specifiednomin
18、al 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 center of the weld to permit an accurate measurementof the fract
19、ured 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 in pounds-force shall not be less than 25 000 multiplied by th
20、e specifiednominal area of the larger wire in square inches in Newtons shall not be less than 172 multiplied by the nominal area in squaremillimeters.NOTE 2Since industry practice is to use butt welds in the manufacture of joint reinforcement, the weld shear strength in pounds-force is prescribedas
21、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 specimens 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 condu
22、cted 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 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 pounds
23、Newtons of four test specimens selected at random.5.6 Bend Tests:5.6.1 Test specimens shall be obtained from the fabricated product 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 eq
24、ual to thenominal diameter of the specified wire. Shaped wires shall be placed on the pin so that the minimum dimension is perpendicularto 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 Requireme
25、nts6.1 When corrosion protection of joint reinforcement is provided, it shall be in accordance with one of the following:6.1.1 Mill GalvanizedZinc coated, in accordance with the hot-dip method of Specification A641/A641M, with a minimum of0.1 oz per ft2 30 g/m2 of surface area. It shall be permissib
26、le to apply the coating before fabrication.6.1.2 Hot-Dip GalvanizedZinc coated, by the hot-dip method, in accordance with Specification A152, Class B (average zinccoating of 1.50 oz per ft2 458 g/m2). The coating shall be applied after fabrication.7. Dimensions and Tolerances7.1 Longitudinal WiresTh
27、e minimum size of longitudinal wires shall be W1.1 MW7.7.2 Cross WiresThe minimum size of cross wires shall be W1.1 MW7. Cross wires shall not project beyond the outsidelongitudinal wires by more than 18 in. 3 mm.7.3 WidthThe width of joint reinforcement is defined as the out-to-out distance of outs
28、ide longitudinal wires. Width shall notvary by more than 18 in. 3 mm from the manufacturers specified standard dimension. Width shall be measured as follows:7.3.1 Ladder Type Joint ReinforcementAt opposite weld points, and7.3.2 Truss Type Joint ReinforcementFrom a weld point on one longitudinal wire
29、 perpendicular to a point on the opposite wirebetween adjacent weld points.TABLE 1 Tension Test RequirementsTensile strength, min, psi MPa 80 000 550Yield strength, min, psi MPa 70 000 485Reduction of area, min, % 30A951/A951M 1627.4 LengthThe length of pieces of joint reinforcement shall not vary b
30、y more than 12 in. 3 mm from the specified length.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 and cross wir
31、es to the nearest 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 0.001 in. 0.030mm.8. Number of Tests8.1 Number of TestsOne set of each test described herein shall be performed for each 300 000 linear feet 91 500 metres
32、ofjoint 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 all parts of the manufacturers facilities that concern the manufacture of the mat
33、erial ordered. Themanufacturer shall afford the inspector all reasonable facilities to assure that the material is being furnished in accordance with thisspecification. Inspection of the wire reinforcement shall be agreed upon between the purchaser and the manufacturer as part of thepurchase order o
34、r contract.9.2 Except for yield strength, all tests and inspections 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 desira
35、ble to determine compliance with the strength requirements of SpecificationA1064/A1064M, tension tests shall be made by a recognized laboratory, or by the wire supplier, observed by the purchasersrepresentative if desired, provided such tests do not interfere unnecessarily with manufacturing operati
36、ons.10. Rejection and Rehearing10.1 Material 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
37、fails to meet the tension or bend test, 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
38、 for the three specimens, including the 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 mater
39、ial shall be consideredas meeting this 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
40、 facilities shall be subject to rejection 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 broke
41、n welds per bundle exceeds 1 % of the 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 t
42、ests performed does not meetthe requirement, 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 s
43、urface irregularities will not be cause 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.10.8 RehearingRejected materials shall be preserved for a period of at least
44、 two weeks from the date 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 requireme
45、nts of this specification shall be the basis of acceptance of the material. The certification shall include thespecification number, year-date of issue, and revision letter, if any.A951/A951M 16311.2 A material test report, certificate of inspection, or similar document printed from or used in elect
46、ronic form from anelectronic data interchange (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 agre
47、ement between the purchaser and the supplier. 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
48、 a standard format such asANSI ASC X12.12. Packaging and Marking12.1 Joint reinforcement shall be assembled in bundles containing 250 to 500 linear feet 75 to 150 metres and securelyfastened together.12.2 Each bundle shall have attached thereto a suitable tag bearing the name of the manufacturer, de
49、scription of the material,ASTM A951/A951M, and other such information as specified by the purchaser.13. Keywords13.1 cross wires; deformed; galvanized wire; hot-dipped galvanized; joint reinforcement; ladder type; longitudinal wires; tensileproperties; truss type; weld shear strengthAPPENDIX(Nonmandatory Information)X1. WELD SHEAR TESTINGX1.1 ScopeThis appendix provides information leading to a better understanding of the purpose and significance of the weldshear strength provisions of this specification.X1.2 Ba
