Common structure: 7 strands / 19 strands / 37 strands
Application: for ACSR, stay wire, Guy wire, overhead earth wire
Specification Of Galvanized Steel Strand
Material: high carbon steel
Galvenized steel wire size: Φ1.44mm-4.770mm
Strand size:7×（1.44-4.2 mm）;19×（1.44-3.5mm）;37×（1.44-3.5mm）
Tensile strength: different Grade from min.1470 N/mm2 to min.1960N/mm2
Zinc coating: According to ASTM A475 Class A
Meets ASTM Specifications A475 or A363 or ASTM B498 or BS EN 50189
Zinc coated steel wires strand (ASTM A 475)
This specification covers five grades of zinc-coated steel wire strands, for use as guy, messengers and span wires.
Physical Properties of Zinc Coated Steel Wires Strand
Nominal diameter of Strand. In (mm) | Number of Wires in Strand | Nominal diameter of Coated Wires in Strand. (mm) | Approximate Weight of Strand(kg/304.8m) | Minimum Breaking Strength of Strand (KN) | ||||
Utilities Grade | Common Grade | Siemens Martin Grade | High Strength | Extra High Strength Grade | ||||
3/16 (4.76) | 7 | 1.57 | 33 | ----- | 5.115 | 8.452 | 12.677 | 17.748 |
7/32 (5.56) | 3 | 2.64 | 40 | ----- | 6.228 | 10.409 | 15.569 | 21.796 |
7/32 (5.56) | 7 | 1.83 | 44 | ------ | 6.850 | 11.387 | 17.126 | 24.020 |
1/4 (6.35) | 7 | 2.03 | 55 | ------ | 8.452 | 14.012 | 21.129 | 29.581 |
9/32 (7.14) | 7 | 2.36 | 74 | 20.462 | 11.432 | 18.905 | 28.469 | 39.812 |
5/16 (7.94) | 7 | 2.64 | 93 | ----- | 14.234 | 23.798 | 35.586 | 49.820 |
3/8 (9.52) | 7 | 3.05 | 124 | 51.155 | 18.905 | 30.915 | 48.040 | 68.503 |
7/16 (11.11) | 7 | 3.68 | 181 | 80.068 | 25.355 | 41.591 | 64.499 | 92.523 |
1/2 (12.70) | 7 | 4.19 | 234 | 111.206 | 32.917 | 53.823 | 83.627 | 119.657 |
1/2 (12.70) | 19 | 2.54 | 229 | ------ | 33.895 | 56.492 | 84.961 | 118.768 |
9/16 (14.29) | 19 | 2.87 | 289 | ------- | 42.881 | 71.616 | 107.202 | 149.905 |
5/8 (15.88) | 19 | 3.18 | 361 | ------- | 48.930 | 80.513 | 124.995 | 178.819 |
3/4 (19.05) | 19 | 3.81 | 524 | ------- | 71.172 | 116.643 | 181.487 | 259.331 |
Nominal Diameters and Minimum Weights of Coating for Zinc-Coated Steel Wire
Diameter(mm) | 1.57 | 1.65 | 1.83 | 2.03 | 2.36 | 2.54 | 2.64 | 2.77 | 3.05 | 3.18 | 3.30 | 3.63 | 3.68 | 3.81 | 4.09 | 4.19 | 4.50 | 4.55 |
Zinc Coated(g/m²) | 153 | 153 | 153 | 183 | 214 | 214 | 244 | 244 | 259 | 259 | 259 | 275 | 275 | 275 | 275 | 275 | 275 | 275 |
Raw Material Of Galvanized Steel Strand
Our raw material is high quality carbon steel hot rolled wire rod according to the standard GB/T4354-2008 .
The chemical composition of the steel conforms to the GB/T699-1999 standard.
chemical composition
Grade | Chemical composition table% | ||||
C | Si | Mn | P | S | |
45 | 0.42-0.50 | 0.17-0.37 | 0.5-0.80 | ≦0.035 | ≦0.035 |
60 | 0.57-0.65 | 0.17-0.37 | 0.5-0.80 | ≦0.035 | ≦0.035 |
65 | 0.62-0.70 | 0.17-0.37 | 0.5-0.80 | ≦0.035 | ≦0.035 |
70 | 0.67-0.75 | 0.17-0.37 | 0.5-0.80 | ≦0.035 | ≦0.035 |
SWRH77B | 0.74-0.81 | 0.15-0.35 | 0.6-0.90 | ≦0.030 | ≦0.030 |
SWRH82B | 0.79-0.86 | 0.15-0.35 | 0.6-0.90 | ≦0.030 | ≦0.030 |
Production Process
The produce process of the galvanized steel wire is following as below:
Drawing process:Surface treatment- Drying - Drawing - -Tension Control-winding
Galvanized process:Washing - Drying - Hot Galvanized - Spooling
Stranding process:stranding-Spooling-Inspection-Packing
Application:
(1)ACSR, Overhead ground wire strand for power transmission lines ,overhead conductor,
(2)Messenger strand for telephone and CATV lines ,communication cable
(3)Guy strand for power distribution poles, telephone poles and microwave and radio towers
(4)Barrier cable and guard rail strand , Suspension wire,staying wire
(5) Other guying applications where small size, high strength and corrosion resistance are necessary
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