GSW – Galvanized Steel Wire

Galvanized steel wires are suitable for the cores of ACSR (Aluminum Conductor Steel Reinforced) to improve their tensile strength. They can also be used in aerial transmission lines as a ground connection material to protect against lightning strikes.

Features:

Bare, zinc-coated steel wires
Improves conductor tensile strength
Used for ACSR cores
Functions as a ground wire
Protects lines from lightning strikes

Galvanized Steel Wires (GSW) are made from bare, zinc-coated steel wires of various grades.

They are suitable for use as the cores of ACSR to enhance their tensile strength. Additionally, they can be utilized in aerial transmission lines, serving as the line material for ground connections to prevent lightning strikes.

The product is manufactured in compliance with several key international standards, which include:

IEC 61089 Round Wire Concentric Lay Overhead Electrical Stranded Conductors
ASTM A 475 Zinc-Coated Steel Wire Strand
BS 183 General Purpose Galvanized Steel Wire Strand
AS 1222.1 Steel Conductors and Stays Bare Overhead Part 1: Galvanized (SC/GZ)
GB/T 1179 Round Wire Concentric Lay Overhead Electrical Stranded Conductors

GSW ASTM A 475

Nominal diameter of strand		Number of Wires in Strand	Nominal Diameter of Coated Wire in Strand (mm)	Approx.weight of strand (kg/km)	Minimun Breaking Strength of Strand (kN)
In.	mm				Utilities Grade	Common Grade	Siemens-Martin Grade	High-Strength Grade	Extra-high Strength Grade
In.	mm				Utilities Grade	Common Grade	Siemens-Martin Grade	High-Strength Grade	Extra-high Strength Grade
1/8	3.18	7	1.04	48	–	2.402	4.048	5.916	8.140
5/32	3.97	7	1.32	76	–	3.870	6.539	9.519	13.078
3/16	4.76	7	1.57	109	–	5.115	8.452	12.677	17.748
3/16	4.76	7	1.65	119	10.676	–	–	–	–
7/32	5.56	3	2.64	131	–	6.228	10.409	15.569	21.796
7/32	5.56	7	1.83	146	–	6.850	11.387	17.126	24.020
1/4	6.35	3	3.05	174	14.012	8.274	13.523	21.040	29.981
1/4	6.35	3	3.05	174	20.017	–	–	–	–
1/4	6.35	7	2.03	180	–	8.452	14.012	21.129	29.581
9/32	7.14	3	3.30	204	–	9.252	15.035	23.398	33.362
9/32	7.14	7	2.36	244	20.462	11.432	18.905	28.469	39.812
5/16	7.94	3	3.68	255	28.913	11.076	18.193	28.246	40.479
5/16	7.94	7	2.64	305	–	14.234	23.798	35.586	49.820
5/16	7.94	7	2.77	335	26.689	–	–	–	–
3/8	9.52	3	4.19	328	37.810	14.813	24.732	37.187	52.489
3/8	9.52	7	3.05	407	51.155	18.905	30.915	48.040	68.503
7/16	11.11	7	3.68	595	80.068	25.355	41.591	64.499	92.523
1/2	12.70	7	4.19	770	111.206	32.917	53.823	83.627	119.657
1/2	12.70	19	2.54	751	–	33.895	56.492	84.961	118.768
9/16	14.29	7	4.78	1000	–	42.703	69.837	108.981	155.688
9/16	14.29	19	2.87	949	–	42.881	71.616	107.202	149.905
5/8	15.88	7	5.26	1211	–	51.599	84.961	131.667	188.605
5/8	15.88	19	3.18	1186	–	48.930	80.513	124.995	178.819
3/4	19.05	19	3.81	1721	–	71.172	116.543	181.487	259.331
7/8	22.22	19	4.50	2356	–	97.416	159.691	248.211	354.523
1	25.40	19	5.08	3089	–	127.664	209.066	325.610	464.839
1	25.40	37	3.63	3065	–	125.885	205.508	319.827	456.832
1 1/8	28.58	37	4.09	4010	–	160.136	262.000	407.457	581.827
1 1/4	31.75	37	4.55	4840	–	198.391	324.720	505.318	721.502

Note:Class A and Class B and Class C are in same structure.

GSW BS 183

Construction Number of wires/wire diameter	Approximate strand diameter (mm)	Minimum breaking load of strand							Approx.mass (kg/km)
		Grade 350	Grade 480	Grade 700	Grade 850	Grade 1000	Grade 1150	Grade 1300
		Grade 350	Grade 480	Grade 700	Grade 850	Grade 1000	Grade 1150	Grade 1300
3/1.80	3.9	2.65	3.66	—	—	—	—	—	60
3/2.65	5.7	5.80	7.95	—	—	—	—	—	130
3/3.25	7.0	8.70	11.95	—	—	—	—	—	195
3/4.00	8.6	13.20	18.10	—	—	—	—	—	295
4/1.80	4.4	3.55	4.90	—	—	—	—	—	80
4/2.65	6.4	7.70	10.60	—	—	—	—	—	172
4/3.25	7.9	11.60	15.90	—	—	—	—	—	260
4/4.00	9.7	17.60	24.10	35.20	—	—	—	—	390
5/1.50	4.1	3.10	4.24	6.18	—	—	—	—	69
5/1.80	4.9	4.45	6.10	8.90	—	—	—	—	95
5/2.65	7.2	9.65	13.25	19.30	—	—	—	—	220
5/3.25	8.8	14.50	19.90	29.00	—	—	—	—	320
5/4.00	10.8	22.00	30.15	43.95	—	—	—	—	490
7/0.56	1.7	0.60	0.83	1.20	—	1.70	1.98	2.24	14
7/0.71	2.1	0.97	1.33	1.94	—	2.75	3.19	3.60	28
7/0.85	2.6	1.39	1.90	2.80	—	3.95	4.57	5.15	31
7/0.90	2.7	1.55	2.14	3.10	—	4.45	5.12	5.80	35
7/1.00	3.0	1.92	2.64	3.85	—	5.50	6.32	7.15	43
7/1.25	3.8	3.01	4.10	6.00	—	8.55	9.88	11.15	67
7/1.40	4.2	3.75	5.17	7.54	9.16	10.75	12.35	14.00	84
7/RSa	4.3	3.85	5.28	7.70	9.35	11.00	12.65	14.30	86
7/1.60	4.8	4.90	6.75	9.85	11.95	14.10	16.20	18.30	110
7/1.80	5.4	6.23	8.55	12.45	—	17.80	20.50	23.20	140
7/2.00	6.0	7.70	10.55	15.40	—	22.00	25.30	28.60	170
7/2.36	7.1	10.70	14.70	21.40	—	30.60	35.20	39.80	240
7/2.65	8.0	13.50	18.50	27.00	—	38.60	44.40	50.20	300
7/3.00	9.0	17.30	23.75	34.65	—	49.50	56.90	64.30	392
7/3.15	9.5	19.10	26.20	38.20	—	54.55	62.75	70.90	430
7/3.25	9.8	20.30	27.85	40.65	—	58.05	66.80	75.50	460
7/3.65	11.0	25.60	35.15	51.25	—	73.25	84.20	95.20	570
7/4.00	12.0	30.90	42.20	61.60	—	88.00	101.0	114.0	690
7/4.25	12.8	34.75	47.65	69.50	—	99.30	114.0	129.0	780
7/4.75	14.0	43.40	59.45	86.80	—	124.0	142.7	161.3	970
19/1.00	5.0	5.22	7.16	10.45	—	14.92	17.16	19.40	120
19/1.25	6.3	8.16	11.19	16.32	—	23.32	26.81	30.31	180
19/1.40	7.0	10.24	14.04	20.47	—	29.25	33.64	38.02	230
19/1.60	8.0	13.37	18.34	26.75	—	38.20	43.93	49.66	300
19/2.00	10.0	20.90	28.65	41.78	50.74	59.69	68.64	77.60	470
19/2.50	12.5	32.65	44.80	65.29	79.28	93.27	107.3	121.3	730
19/3.00	15.0	47.00	64.50	94.00	114.1	134.3	154.5	174.6	1050
19/3.55	17.8	65.80	90.27	131.6	159.9	188.0	216.3	244.5	1470
19/4.00	20.0	83.55	114.6	167.1	203.0	238.7	274.6	310.4	1870
19/4.75	23.8	117.85	161.6	235.7	286.0	336.7	387.2	437.7	2630

a The construction of this strand consists of six wires of 1.40 mm diameter on a centre wire of 1.50 mm diameter. The diameter of the centre wire shall not be less than 0.08 mm nor more than 0.12 mm greater than the diameter of the outer wire.

GSW(SC/GZ) AS 1222.2

Standing and wire diameter (mm)	Approx. overall diameter (mm)	Cross-section area (mm²)	Approx. mass (kg/km)	Calculated breaking load (kN)	Equivalent aluminium area (mm²)	Typical DC resistance per km at 20°C (Ω)


3/2.00	4.31	9.426	74	11.7	1.4	20
3/2.75	5.93	17.82	140	22.2	2.6	11
7/2.00	6.00	21.99	173	26.0	3.2	8.7
7/2.75	8.25	41.58	328	49.0	6.1	4.6
7/3.25	9.75	58.07	458	68.7	8.6	3.3
7/3.75	11.3	77.28	609	91.3	11	2.5
19/2.00	10.0	59.70	473	70.5	8.8	3.2
19/2.75	13.8	112.9	894	133	17	1.7
19/3.25	16.3	157.6	1250	186	23	1.2

GSW GB/T 1179

Code Number	Area (mm²)	Number of wires	Diameter (mm)		Linear Mass (kg/km)	Rated strength (kN)					DC resistance (Ω/km)
			Wire	Cond.		JG1A	JG2A	JG3A	JG4A	JG5A
			Wire	Cond.		JG1A	JG2A	JG3A	JG4A	JG5A
10	10.8	7	1.40	4.20	84.8	14.44	15.62	17.46	20.15	21.12	17.9754
15	17.8	7	1.80	5.40	140.1	23.87	25.83	28.86	33.31	34.91	10.8740
20	22.0	7	2.00	6.00	173.0	29.47	31.89	35.63	41.12	43.10	8.8079
25	26.6	7	2.20	6.60	209.3	35.66	38.58	43.11	49.76	52.15	7.2793
35	37.2	7	2.60	7.80	292.4	48.69	52.40	59.09	67.64	70.99	5.2118
40	38.2	19	1.60	8.00	301.9	51.19	55.39	61.89	71.44	74.88	5.0939
50	49.5	7	3.00	9.00	389.2	64.82	69.77	78.67	90.05	94.51	3.9146
50	48.3	19	1.80	9.00	382.1	64.79	70.11	78.33	90.41	94.76	4.0248
55	56.3	7	3.20	9.60	442.9	72.62	79.38	87.26	99.65	105.3	3.4406
60	59.7	19	2.00	10.0	471.7	79.98	86.55	96.70	111.6	117.0	3.2601
65	67.3	7	3.50	10.5	529.8	86.88	94.96	104.4	119.2	125.9	2.8761
70	72.2	19	2.20	11.0	570.8	96.78	104.73	117.00	135.1	141.6	2.6943
75	74.4	37	1.60	11.2	589.4	99.7	107.9	120.5	139.1	145.8	2.6225
80	79.4	7	3.80	11.4	624.5	102.4	109.6	120.7	136.5	144.5	2.4399
80	78.9	19	2.30	11.5	623.9	103.4	111.3	125.5	143.7	150.8	2.4651
90	88.0	7	4.00	12.0	692.0	113.5	121.4	133.7	151.3	160.1	2.2020
95	94.8	19	2.52	12.6	748.9	124.14	133.62	150.68	172.5	181.0	2.0535
100	101	19	2.60	13.0	797.2	132.1	142.2	160.4	183.6	192.7	1.9291
115	116	37	2.00	14.0	921.0	155.8	168.5	188.3	217.4	227.8	1.6784
125	125	19	2.90	14.5	991.8	164.4	177.0	199.5	228.4	239.7	1.5506
150	153	19	3.20	16.0	1207.6	197.1	215.5	236.9	270.5	285.7	1.2735
155	154	37	2.30	16.1	1218.0	201.4	216.8	244.4	279.8	293.6	1.2691
185	183	19	3.50	17.5	1444.7	235.8	257.8	283.3	323.6	341.8	1.0645
200	196	37	2.60	18.2	1556.5	257.3	277.0	312.3	357.5	375.2	0.9931
240	239	19	4.00	20.0	1886.9	308.0	329.5	362.9	410.7	434.5	0.8150
245	244	37	2.90	20.3	1936.4	320.2	344.6	388.6	444.8	466.8	0.7983
300	298	37	3.20	22.4	2357.7	383.9	419.6	461.2	526.7	556.5	0.6556
355	356	37	3.50	24.5	2820.5	459.2	501.9	551.8	630.1	665.7	0.5480
465	465	37	4.00	28.0	3683.9	599.8	641.6	706.7	799.7	846.2	0.4196

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GSW – Galvanized Steel Wire

GSW ASTM A 475

GSW BS 183

GSW(SC/GZ) AS 1222.2

GSW GB/T 1179

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