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st52 3 us equivalentst52 chemical compositionst52 3 equivalentst52.3 steel specsst 52 steel equivalentst52 material specificationst52.0st52 steel propertiesSome results are removed in response to a notice of local law requirement. For more information, please see here.(plate)ST52 Pipe, ST 52 Seamless Pipes, ST52 Steel Pipe Stockists(steel) Carbon Steel DIN 2391 ST52 Pipe ST52 Square Pipe Stockholder Werkstoff is located in Jinan city, Shandong province,China, founded in1997. Our products have advantages in large-diameter, thick-walled square or rectangular tubes, fill the blank of domestic and abroad market, widely used in large scale steel structure project square hollow section steel pipe st52