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ASTM A640-97(2014)

Historical Reaffirmation

Standard Specification for Zinc-Coated Steel Strand for Messenger Support of Figure 8 Cable

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1.1 This specification covers two sizes of extra-high-strength grade of concentric-lay steel wire strand, composed of seven, zinc-coated steel wires, specifically intended for use as the supporting messenger in Figure 8-type communication and electrical cables.

1.2 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.


This specification covers two sizes of extra-high-strength grade of concentric-lay steel wire strand, composed of seven, zinc-coated steel wires, specifically intended for use as the supporting messenger in Figure 8-type communication and electrical cables. Steel wires shall be manufactured by the open-hearth, basic-oxygen, or electric-furnace process. Materials shall adhere to specified mechanical and physical requirements such as breaking strength, elongation, ductility, nominal diameter, and coating weight and adherence. Zinc coatings shall be continuous and of reasonably uniform thickness, and wires shall be free from imperfections not consistent with good commercial practice.


SDO ASTM: ASTM International
Document Number A640
Publication Date Aug. 1, 2014
Language en - English
Page Count 3
Revision Level 97(2014)
Supercedes
Committee A05.12
Publish Date Document Id Type View
April 10, 1997 A0640-97R02E01 Revision
April 10, 1997 A0640-97 Revision
Sept. 1, 2019 A0640-97R19 Reaffirmation
Aug. 1, 2014 A0640-97R14 Reaffirmation
May 1, 2009 A0640-97R09E01 Reaffirmation
April 10, 1997 A0640-97R02 Reaffirmation