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din 2448 st52 seamless steel pipe carbon tube from china supplier, US $ 485 - 850 / Ton, DIN, DIN 1629/3, DIN 2391, DIN 17175, DIN EN 10025, ST35-ST52, ST52, 1 - 120 mm.Source from Shandong Liaocheng Yizhong Commercial Trade Co., Ltd. on Waimaotong.com.