Home>ASTM Standards>ASTM A459-08(R2020) pdf free download

ASTM A459-08(R2020) pdf free download

ASTM A459-08(R2020) pdf free download.Standard Specification for Zinc-Coated Flat Steel Armoring Tape
1. Scope
1.1 This specification covers requirements for zinc-coated flat steel tape in coils for use as interlocking armor and flat armor for electrical cables. The zinc-coated tape is produced with three classes of zinc coating weight. 1.2 Units—The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.3 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
5. Materials and Manufacture
5.1 The base metal shall be steel made by the basic-oxygen, or electric-furnace process and of such quality that when processed and coated with zinc, the finished tape shall have the properties and characteristics prescribed in this specification. 5.2 The uncoated tape shall have a mill finish and may have either a mill or slit edge. If the uncoated tape is manufactured by slitting or shearing, slitting burrs shall be kept to a minimum consistent with good commercial practice. 5.3 The zinc shall be applied by either the hot-dip or the electrogalvanizing process by a final operation so that all surfaces including edges are coated. 5.4 The slab zinc when used shall conform to any grade of zinc described in Specification B6.
6. Joints
6.1 The zinc-coated tape shall be furnished in coils of one continuous length, with not more than an average of one weld/50 lb (23 kg). Only welds made prior to the zinc coating operation shall be permitted and the area of such welds shall conform to the standard tolerance for thickness. The welds shall be smooth and free of sharp projections.
7. Sampling
7.1 During the visual inspection specified in Section 16, the inspector shall select at random, 1 sample coil from every 10 coils in the first 100 coils of the lot and 1 sample coil for every additional 35 coils, but not less than 3 coils from the entire lot. 7.2 From each coil of zinc-coated tape thus selected, a sample of suitable length shall be taken for the weight of coating and the mechanical tests as specified in Sections 8 to 12. 7.3 Any sample that indicates the presence of a weld shall be discarded and another sample shall be taken from the coil for testing.
8. Tensile Strength
8.1 The zinc-coated tape shall have a tensile strength of 70 ksi (483 MPa), maximum. The tensile strength shall be determined on longitudinal specimens consisting of the full width of the tape when practical, or a straight specimen cut or sheared from the center of the tape.
9. Elongation
9.1 The zinc-coated tape shall have an elongation ofnot less than 10 % in 10 in. (254 mm). The elongation shall be determined as the permanent increase in length, after failure of a marked section of the tape specimen originally 10 in. in length.
10. Ductility
10.1 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 to the naked eye. Cracks at sheared edges and coarse grains on the bends of any specimens may be disregarded. Flaking or cracking of the galvanized finish shall not be interpreted as a failure of the material.
15. Inspection
15.1 The manufacturer shall afford the inspector represent- ing the purchaser all reasonable facilities, without charge, to satisfy him that the material is being furnished in accordance with this specification. All tests and inspections shall be made at the place of manufacture prior to shipment, unless otherwise agreed upon at the time of the purchase, and shall be so conducted as not to interfere unnecessarily with the operation of the works.

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