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ASTM A741.pdf
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ASTM A741.pdf
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Designation: A 741 – 98 (Reapproved 2003)
Standard Specification for
Zinc-Coated Steel Wire Rope and Fittings for Highway
Guardrail
1
This standard is issued under the fixed designation A 741; 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
3
⁄
4
and 1-in. [19 and 25-mm]
zinc-coated steel wire rope and fittings for use in the construc-
tion of highway guardrail.
1.2 The values stated in inch-pound units are to be regarded
as the standard. The values given in brackets are for informa-
tion 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 123/A123M Specification for Zinc (Hot-Dip Galvanized)
Coatings on Iron and Steel Products
2
A 153/A 153M Specification for Zinc Coating (Hot-Dip) on
Iron and Steel Hardware
2
A 370 Test Methods and Definitions for Mechanical Testing
of Steel Products
3
A 902 Terminology Relating to Metallic Coated Steel Prod-
ucts
2
B 6 Specification for Zinc
4
3. Terminology
3.1 Definitions—For definitions of terms used in this speci-
fication, refer to Terminology A 902.
4. Ordering Information
4.1 Orders for wire rope guardrail material purchased to this
specification shall include the following:
4.1.1 Diameter of wire rope,
4.1.2 Type of wire rope construction,
4.1.3 Class of zinc coating required (Table 1),
4.1.4 Quantity of wire rope and length per reel, and
4.1.5 ASTM designation and year of issue.
NOTE 1—A typical ordering description is as follows:
3
⁄
4
-in. [19-mm]
diameter, Zinc-Coated Wire Rope for Guardrail, Type 1 Construction,
Class A Coating, 80 000 lineal ft [24 300 m] on forty 2 000-ft [608-m]
reels, ASTM A 741– .
5. Material
5.1 Base Metal—The base metal shall be steel made by any
process and shall be of such quality that the finished wire rope
and the individual zinc-coated wires shall have the properties
as prescribed in this specification.
5.2 Zinc—The slab zinc when used for the coating shall be
any grade of zinc conforming to Specification B 6.
6. Mechanical Requirements
6.1 Breaking Strength—The zinc-coated steel wire rope
shall conform to the mechanical properties in Table 2 when
tested in accordance with Test Methods and Definitions A 370
and employing a suitable gripping device as covered in
Supplement VII of Test Methods and Definitions A 370.
6.2 Construction—The zinc-coated wire rope and indi-
vidual wires shall conform to the dimension and construction
requirements of Table 2.
6.3 Ductility of Steel—The individual zinc-coated wires
shall be capable of being wrapped two turns in a close helix at
a rate not exceeding 15 turns per minute around a cylindrical
steel mandrel equal to three times the nominal diameter of the
wire under test without cracking or breaking of the wire.
6.4 Weight of Zinc Coating—The class of zinc coating shall
be specified by the purchaser. The weight of the zinc coating on
the individual wires for the specified class and appropriate wire
size shall not be less than that specified in Table 1 when tested
in accordance with the stripping test of Test Method A 90 /A
90M.
6.5 Adherence of Coating—The individual zinc-coated
wires shall be capable of being wrapped two turns in a close
helix at a rate not exceeding 15 turns per minute around a
cylindrical steel mandrel equal to three times the nominal
diameter of the wire under test without the coating cracking or
flaking to such an extent that any zinc can be removed by
rubbing with bare fingers. Loosening or detachment during the
adherence test of superficial small particles of zinc formed by
mechanical polishing of the surface of zinc-coated wire shall
not be considered cause for rejection.
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 A05.12 on Wire Specifications.
Current edition approved April 10, 2003. Published June 2003. Originally
approved in 1976. Last previous edition approved in 1998 as A 741 – 98.
2
Annual Book of ASTM Standards, Vol 01.06.
3
Annual Book of ASTM Standards, Vol 01.03.
4
Annual Book of ASTM Standards, Vol 02.04.
1
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Copyright ASTM International
Provided by IHS under license with ASTM
Not for Resale
No reproduction or networking permitted without license from IHS
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