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This specification covers five grades of zinc-5 % aluminum-mischmetal (Zn-5 Al-MM) alloy-coated, steel wire strand, composed of a number of round, steel wires, with four weights of Zn-5 Al-MM alloy coatings, suitable for use as guys, messengers, span wires, and for similar purposes. The five grades covered are: utilities; common; Siemens-Martin; high-strength; and extra high-strength. The four weights covered here are Classes 1, A, B, and C. The base metal shall be steel made by any commercially accepted steel making process. The bath metal used in continuous hot-dip Zn-5 Al-MM alloy-coating shall meet the chemical composition limits specified. The determination of chemical composition shall be made in accordance to the required specifications. Breaking strength test, elongation test, and ductility test shall be made to conform to the requirements specified.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
1.1 This specification covers five grades of zinc-5 % aluminum-mischmetal (Zn-5 Al-MM) alloy-coated, steel wire strand, composed of a number of round, steel wires, with four weights of Zn-5 Al-MM alloy coatings, suitable for use as guys, messengers, span wires, and for similar purposes. The product is intended for applications requiring corrosion resistance and formability.
1.2 The five grades covered are as follows:
1.2.4 High-strength, and
1.2.5 Extra high-strength,
1.2.6 Minimum breaking strengths of strand for each grade are described in Section .
1.3 The four weights of coatings are: Class1 and Classes A, B, and C. Minimum weights of Zn-5 Al-MM alloy are described in Section .
1.4 This specification is applicable to orders in either inch-pound units (as ) or acceptable SI units (as ). Inch-pound units and SI units are not necessarily equivalent.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A90/A90M Test Method for Weight [Mass] of Coating on Iron and Steel Articles with Zinc or Zinc-Alloy Coatings
A902 Terminology Relating to Metallic Coated Steel Products
B750 Specification for GALFAN (Zinc-5% Aluminum-Mischmetal) Alloy in Ingot Form for Hot-Dip Coatings,
E47 Test Methods for Chemical Analysis of Zinc Die-Casting Alloys
E1277 Test Method for Analysis of Zinc-5 % Aluminum-Mischmetal Alloys by ICP Emission Spectrometry
ICS Number Code 77.140.65 (Steel wire, wir ropes and link chains)
UNSPSC Code 31152206(Coated steel wire)
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ASTM A855 / A855M-03(2020), Standard Specification for Zinc-5 % Aluminum-Mischmetal Alloy-Coated Steel Wire Strand, ASTM International, West Conshohocken, PA, 2020, www.astm.orgBack to Top