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Introduction to the characteristics of cold-rolled steel strips for armored cables by packaging steel strip manufacturers
by：Hongmei
2021-03-15
Introduction to the characteristics of cold-rolled steel strips for armored cables by packaging steel strip manufacturers
(1) It is made of hot-emulsion steel strip after cold rolling, mainly used for processing the painted steel strip, galvanized steel strip and tin-plated steel strip of the cable armor layer. The allowable deviation of the thickness of the cold-rolled steel strip for armored cables within 30m from the head and tail of the steel strip can exceed 25% of the value specified in the standard.
(2) The size, allowable size deviation, sickle bend and unevenness of the cold-rolled steel strip for armored cables should comply with the YB/T 024-2008 standard.
(3) Mechanical properties of cold-rolled steel strip for armored cables: tensile strength should not be less than 300N/mm2, and its elongation should not be less than 20%.
(4) Appearance and surface requirements of cold-rolled steel strip for armored cables: dark gray oxide thin layer is allowed on the surface of the steel strip, and convex, concave, bean marks and scratches that do not exceed half of the allowable tolerance of thickness And individual scars. The surface of the bright annealed steel strip should be silvery white. The edge of the steel strip must not have torn (broken edges) and coarse burrs, but fine burrs not greater than 1/4 of the allowable tolerance of the thickness are allowed.
(5) Length of cold steel strip for wrong installation of cable: In order to ensure the length of painted steel strip, galvanized steel strip and tinned steel strip for cable armoring, reduce the joints, the steel strip supplied in coils, its coil The inner diameter should be 175 mm ± 10 mm or 200 mm ± 10 mm, and the outer diameter should not be less than 400 mm.
(1) It is made of hot-emulsion steel strip after cold rolling, mainly used for processing the painted steel strip, galvanized steel strip and tin-plated steel strip of the cable armor layer. The allowable deviation of the thickness of the cold-rolled steel strip for armored cables within 30m from the head and tail of the steel strip can exceed 25% of the value specified in the standard.
(2) The size, allowable size deviation, sickle bend and unevenness of the cold-rolled steel strip for armored cables should comply with the YB/T 024-2008 standard.
(3) Mechanical properties of cold-rolled steel strip for armored cables: tensile strength should not be less than 300N/mm2, and its elongation should not be less than 20%.
(4) Appearance and surface requirements of cold-rolled steel strip for armored cables: dark gray oxide thin layer is allowed on the surface of the steel strip, and convex, concave, bean marks and scratches that do not exceed half of the allowable tolerance of thickness And individual scars. The surface of the bright annealed steel strip should be silvery white. The edge of the steel strip must not have torn (broken edges) and coarse burrs, but fine burrs not greater than 1/4 of the allowable tolerance of the thickness are allowed.
(5) Length of cold steel strip for wrong installation of cable: In order to ensure the length of painted steel strip, galvanized steel strip and tinned steel strip for cable armoring, reduce the joints, the steel strip supplied in coils, its coil The inner diameter should be 175 mm ± 10 mm or 200 mm ± 10 mm, and the outer diameter should not be less than 400 mm.
