What is the material of hot-rolled seamless steel pipe? Seamless steel pipe is generally used: it is made of high-quality carbon-structured steel such as 10, 20, 30, 35, 45, 16Mn, 5MnV and other low-alloy structural steel or 40Cr, 30CrMnSi, 45Mn2, 40MnB and other alloy steel Hot or cold rolled. S...
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