... Product info:ProductsCold drawn mild seamless steel pipe, steel tubeOriginShandong, ChinaStandardsGB 8162/GB 8163Grades20# 16Mn Q235, ST52Chemical Composition (%)CSiMnCrNiCu≤0.17-0.230 ... seamless steel pipe, steel tube can be classified by into steel pipe, steel pipe thermal equipment, machinery and industrial steel, petroleum, geological drilling steel, container steel, chemical ...