Galvanized steel strand manufacturer GJ-70 hot galvanized steel strand section
Galvanized steel strand is a steel product formed by twisting several galvanized steel wires together. Mainly used for hanger, suspension Communication cable , overhead power lines, fixed objects, ties, etc.
New standards
GB YB/T 5004-2012
Relevant standards
YB/T5004-1993 Price of Galvanized Steel Strand
YB/T098-1997 Galvanized Steel Strand for Optical Cable
YB/T5004-2001 Specification of Galvanized Steel Strand
Features: 1. Good flexibility 2. Good stability 3. Good reliability 4. High strength
classification
a. The steel strand is divided into four types according to the section structure? As shown in the figure below. Structure 1 × 3 1 × 7 1 × 19 1 × 37
Cross section of steel strand
b. According to the nominal tensile strength, the national standard steel strand is divided into five grades: 1270MPa, 1370MPa, 1470MPa, 1570MPa and 1670MPa.
c. According to the different thickness of the steel wire zinc layer in the galvanized steel strand, the steel wire zinc layer in the national standard steel strand is divided into three levels: A, B, C.
Surface quality 1. The surface of the steel wire in the steel strand shall be free of lamination, scratch, fracture, flattening, hard bending and other defects. 2. The surface of steel strand must be free of oil, dirt, water and other Impurities. 3. The galvanized layer on the surface of the stripped steel wire in the steel strand shall be uniform and continuous without cracks and peeling. However, a small amount of flash points, white thin layer and color difference are allowed on the surface of zinc layer.
Example of marking of steel strand: structure 1x7, diameter 6.0mm, tensile strength 1370M Pa, marking of steel strand with grade A zinc layer: 1X7-6.0-1370-A-YB/T 5004-2012
Packaging, marking and quality certificate The packaging, marking and quality certificate of steel strand shall be in accordance with GB/T 2104. Generally, all steel strands shall be delivered in coils. According to the agreement of both parties, moisture-proof paper, linen, plastic woven cloth and other supplementary packaging can be added.
The galvanized steel strand is usually used for messenger wire, guy wire, core wire or strength member, etc. It can also be used as the ground wire/ground wire for overhead transmission, barrier cable on both sides of the highway, or structure cable in the building structure. The galvanized steel strand with the structure of 1 × 7 and the specifications of 5.4, 6.0, 6.6 and 9.0 can be used for the overhead stay wire of posts and telecommunications poles.
As an industrial product, we must pay attention to its external quality when selecting it, and ensure that the quality of each steel wire is uniform and the twisting force of each steel wire is appropriate. Because as a product made of stranded steel wires, the dispersion of each steel wire of the steel strand should be prevented from affecting the use of the stranded steel wire during the use of the stranded steel wire, and the stranded steel wire must be regular, so as not to cause the wrong twisting or even fracture of the steel wire.
The hot-dip galvanized steel strand is sometimes used as a conductive tool in use, so it should be selected to ensure that the surface of the steel strand is smooth and free of oil, and there is no impurity between the steel strands, which affects the use of various steel strands. However, for some galvanized steel strands, special attention should be paid to the inspection of the galvanized layer to ensure that the galvanized layer is uniform and free of dew points, Only in this way can the steel strand be better protected and play its due role.
Before we buy galvanized steel strand, we must further understand its model and type. Any product can only know which is of good quality after we understand its integrity. The quality of steel strand of the same model is different from that of different manufacturers, so we should choose products from regular manufacturers, And keep cooperating with this enterprise, so that not only its quality can be guaranteed, but also the purchase cost can be saved, which is of great help to the future development.
