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OD: 30*30-600*500MM ( ERW & SMLS) WT:2-25MM Steel grade: Q195, Q235, Q345, 20#, 16Mn, ST37/44/ST52, ASTM A53/106, STKR490/STKR400, ASTM A500 GR, S355, S275, S235, E355 Standard: JISG 3466, DIN EN ...