Commonly used for overhead ground/shield wire, guys and messengers, and for steel core in ACSR conductors.
ASTM A363 – This specification covers concentric lay stranded steel wire composed of three or seven wires with a Class A coating specifically intended for use as overhead ground/shield wires for transmission lines. ASTM A475 – This specification covers the five grades of class A zinc-coated steel wire strand, Utilities, Common, Siemens-Martin, High-Strength, and Extra High-Strength, suitable for use as guy and messenger wires. ASTM B498 – This specification covers round, class A zinc-coated, steel core wire used for the reinforcement of ACSR conductors.
| ASTM A 475-2003 | ||||||||
| Norminal Diameter | No.of wires | Diameter of wire | Tolerance of wire | Weight | Zinc coating | Broken Loading | ||
| Inch | mm | pcs | mm | ± mm | Kgs/100M | G/M2 | Lbf | Kn |
| 1/8" | 3.18 | 7 | 1.04 | 0.05 | 48 | 122 | 1830 | 8.14 |
| 5/32" | 3.97 | 7 | 1.32 | 0.05 | 76 | 122 | 2940 | 13.078 |
| 3/16" | 4.76 | 7 | 1.57 | 0.08 | 109 | 153 | 3990 | 17.748 |
| 7/32" | 5.56 | 7 | 1.83 | 0.08 | 146 | 153 | 5400 | 24.02 |
| 1/4" | 6.35 | 7 | 2.03 | 0.08 | 180 | 183 | 6650 | 29.581 |
| 9/32" | 7.14 | 7 | 2.36 | 0.10 | 244 | 214 | 8950 | 39.812 |
| 5/16" | 7.94 | 7 | 2.64 | 0.10 | 305 | 244 | 11200 | 49.82 |
| 3/8" | 9.52 | 7 | 3.05 | 0.10 | 407 | 259 | 15400 | 68.503 |
| 7/16" | 11.11 | 7 | 3.68 | 0.13 | 595 | 275 | 20800 | 92.523 |
| 1/2" | 12.7 | 7 | 4.19 | 0.13 | 770 | 275 | 26900 | 119.657 |
| 9/16" | 14.29 | 7 | 4.78 | 0.13 | 1000 | 305 | 35000 | 155.688 |
| 5/8" | 15.88 | 7 | 5.26 | 0.13 | 1211 | 305 | 42400 | 188.605 |
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