Made by galvanising process, i.e. forming a zinc coating on the surface of the steel pipe to improve the corrosion resistance of the pipe.
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Hot rolled steel sheets are steel sheets made by rolling at high temperatures, usually heated and rolled in a hot rolling process to produce steel sheets with a variety of uses.
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Galvanised steel strip is a metal strip that has undergone a hot-dip treatment, usually made from carbon steel. This process adds a zinc coating to the surface of the steel strip to increase its resistance to corrosion and durability.
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Galvanised square tube is a kind of with hot-rolled or cold-rolled galvanised steel strip or galvanised coil for the billet by cold bending processing and shaping, and then by high-frequency welding made of square cross-section shape dimensions of the hollow square cross-section steel tube.
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Annealed square pipe is a kind of square steel pipe treated by heat treatment process, especially hot annealing process. Hot annealing is a common metal heat treatment method designed to improve the physical and mechanical properties of metal materials.
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Strips are usually made from steel, which is processed through a cold or hot rolling process. Strip steel usually has a narrow width, which is small in relation to its length, and a relatively thin thickness.
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