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ASTM A459.pdf
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ASTM A459.pdf
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Designation: A 459 – 97 (Reapproved 2003)
Standard Specification for
Zinc-Coated Flat Steel Armoring Tape
1
This standard is issued under the fixed designation A 459; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
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 The values stated in inch-pound units are to be regarded
as the standard. The values in brackets are provided for
information only.
2. Referenced Documents
2.1 ASTM Standards:
A 90/A 90M Test Method for Weight [Mass] of Coating on
Iron and Steel Articles with Zinc or Zinc-Alloy Coatings
2
A 902 Terminology Relating to Metallic Coated Steel Prod-
ucts
2
B 6 Specification for Zinc
3
3. Terminology
3.1 Definitions—See Terminology A 902 for definitions of
general terminology relating to metallic-coated steel products.
4. Ordering Information
4.1 Orders for material under this specification shall include
the following information:
4.1.1 Quantity of each size,
4.1.2 Width and thickness (see 13),
4.1.3 Copper-bearing steel base metal, when required (see
5),
4.1.4 Class of coating (see 11), and
4.1.5 Packaging requirements (see 17).
5. Materials and Manufacture
5.1 The base metal shall be steel made by the open-hearth,
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 B 6.
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 of not 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.
1
This specification is under the jurisdiction of ASTM Committee A05 on
Metallic Coated Iron and Steel Products and is the direct responsibility of
Subcommittee A05.11 on Sheet Specifications.
Current edition approved April 10, 2003. Published June 2003. Originally
approved in 1961. Last previous edition approved in 1997 as A 459 – 97.
2
Annual Book of ASTM Standards, Vol 01.06.
3
Annual Book of ASTM Standards, Vol 02.04.
1
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Copyright ASTM International
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