Current label: Square tube manufacturing
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Square tube is a hollow square thin-walled steel tube, also known as steel cold-formed profile: it is a profile steel with square section dimensions made of Q235 hot-rolled or cold-rolled strip steel or coiled plate as the base material after cold bending and forming, and then high-frequency welding. Hot rolled extra thick wall square tubes are subject to cyclic loading except for wall thickening. Glass curtain walls, automobile chassis, solar power generation supports and many machine parts are subject to cyclic loading
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Classification of seamless square tube: 1. Hardness is the pointer to weigh the soft and hard level of metal materials. At present, the indentation hardness method is commonly used to measure the hardness in consumption. It uses the indenter with corresponding geometric shape to press into the surface of the metal data to be tested under the corresponding load, and measures the hardness value according to the indentation level. Common methods include Brinell hardness (HB) and Rockwell hardness (HRA