Current label: Square tube manufacturer
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The difference between seamless square tube and straight seam square tube: where is the big difference between straight seam square tube and seamless square tube? Analysts believe that the accelerated recovery of economic growth is one of the important factors to promote the square tube plate. Previously, there was a strong short selling mood in the US market, but recently, with the release of better than expected economic data from the US, Europe and China, the market mood has improved. Elimination
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In order to prevent the square tube from showing the defect of hot cracking, we can take the following eight measures: (1) According to the pipe structure, size, length and width, thickness, etc., design a correct and reasonable gating system structure and setting position. In the process of condensation line shrinkage, ensure the temperature difference is balanced, and then solidify in order to make the square tube shrink normally and freely. (2) According to the mud core structure, the core bone structure shall be manufactured with corresponding rigidity
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Commonly used square tube size: for example, the commonly used square tube size of seamless square tube with an outer diameter of 50mm, ⑴ It is generally calibrated in millimeters (mm) of the outer diameter D, inner diameter and wall thickness S of the square tube. ⑵ Each type of square tube has regular different sizes, with 29 types of 32-195mm outer diameter. Another example is the nominal diameter of welded square pipe 2
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Necessary raw materials for square tube production: firstly, the straightness of the square tube must meet the piercing request, which will affect the consumption rhythm and adversely affect the production and quality of the local square tube. Secondly, the billet cutting slope of square tube will also have some adverse effects on the piercing process. The billet cutting of the square tube is too large or the ends are not uniform, which will consume the necessary raw materials of the square tube, and also affect the inner side of the circular furnace
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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