ASTM A640-97(2019),Standard Specification for Zinc-Coated Steel Strand for Messenger Support of Figure 8 Cable.The size of this pdf file is 779K.Now you can download it on www.freestandardsdownload.com
ASTM A640-97(2019) 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.
5. Ordering Information
5.1 Orders for material under this specification shall include the following information:
5.1.1 Nominal strand diameter (Table 1)
5.1.2 Quantity of each size of strand, length in feet (metres)
5.1.3 Unit length (see 16.1)，
5.1.4 Sealing compound, if required, and the method of application. Special requirements of sealing compound(Note)，
5.1.5 Package size if different from standard ( Section 16)
5.1.6 Special package marking(see 16.4),and
5.1.7 Inspection (Section 14)
6. Materials and Manufacture
6. 1 The base metal of the wires shall be steel made by the open-hearth, basic-oxygen, or electric-furmace process and of such quality and purity that, when drawn to the size of wire specified and coated with zinc, the finished strand and the individual wires shall be of uniform quality and have the properties and characteristics as prescribed in this specification.

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