ASTM_A_459_-_08_2013.pdf

Designation:A45908(Reapproved 2013)Standard Specification forZinc-Coated Flat Steel Armoring Tape1This standard is issued under the fixed designation A459;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers requirements for zinc-coatedflat steel tape in coils for use as interlocking armor and flatarmor for electrical cables.The zinc-coated tape is producedwith three classes of zinc coating weight.1.2 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.2.Referenced Documents2.1 ASTM Standards:2A90/A90M Test Method for Weight Mass of Coating onIron and Steel Articles with Zinc or Zinc-Alloy CoatingsA902 Terminology Relating to Metallic Coated Steel Prod-uctsB6 Specification for Zinc3.Terminology3.1 Definitions See Terminology A902 for definitions ofgeneral terminology relating to metallic-coated steel products.4.Ordering Information4.1 Orders for material under this specification shall includethe following information:4.1.1 Quantity of each size,4.1.2 Width and thickness(see 13),4.1.3 Class of coating(see 11),and4.1.4 Packaging requirements(see 17).5.Materials and Manufacture5.1 The base metal shall be steel made by the basic-oxygen,or electric-furnace process and of such quality that whenprocessed and coated with zinc,the finished tape shall have theproperties and characteristics prescribed in this specification.5.2 The uncoated tape shall have a mill finish and may haveeither a mill or slit edge.If the uncoated tape is manufacturedby slitting or shearing,slitting burrs shall be kept to a minimumconsistent with good commercial practice.5.3 The zinc shall be applied by either the hot-dip or theelectrogalvanizing process by a final operation so that allsurfaces including edges are coated.5.4 The slab zinc when used shall conform to any grade ofzinc described in Specification B6.6.Joints6.1 The zinc-coated tape shall be furnished in coils of onecontinuous length,with not more than an average of oneweld/50 lb(23 kg).Only welds made prior to the zinc coatingoperation shall be permitted and the area of such welds shallconform to the standard tolerance for thickness.The weldsshall be smooth and free of sharp projections.7.Sampling7.1 During the visual inspection specified in Section 16,theinspector shall select at random,1 sample coil from every 10coils in the first 100 coils of the lot and 1 sample coil for everyadditional 35 coils,but not less than 3 coils from the entire lot.7.2 From each coil of zinc-coated tape thus selected,asample of suitable length shall be taken for the weight ofcoating and the mechanical tests as specified in Sections 8 to12.7.3 Any sample that indicates the presence of a weld shallbe discarded and another sample shall be taken from the coilfor testing.8.Tensile Strength8.1 The zinc-coated tape shall have a tensile strength of 70ksi(483 MPa),maximum.The tensile strength shall bedetermined on longitudinal specimens consisting of the fullwidth of the tape when practical,or a straight specimen cut orsheared from the center of the tape.9.Elongation9.1 The zinc-coated tape shall have an elongation of not lessthan 10%in 10 in.(254 mm).The elongation shall be1This specification is under the jurisdiction of ASTM Committee A05 onMetallic-Coated Iron and Steel Products and is the direct responsibility ofSubcommittee A05.11 on Sheet Specifications.Current edition approved April 1,2013.Published April 2013.Originallyapproved in 1961.Last previous edition approved in 2008 as A459 08.DOI:10.1520/A0459-08R13.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 determined as the permanent increase in length,after failure ofa marked section of the tape specimen originally 10 in.inlength.10.Ductility10.1 The tape shall be capable of being bent flat on itself,either lengthwise or crosswise,without indication of failure.There shall be no base metal cracks along any bend visible tothe naked eye.Cracks at sheared edges and coarse grains on thebends of any specimens may be disregarded.Flaking orcracking of the galvanized finish shall not be interpreted as afailure of the material.11.Weight of Coating11.1 The weight of zinc coating shall not be less than thatprescribed for the class specified,as follows:ClassWeight of Zinc Coating,oz/ft2(g/m2)(Total of Both Surfaces and Both Edges)Class I0.35(110)Cl