GB/T 706-2016 Q235 Q355 ASTM A36 ASTM A572 Gr.50 Standard I Beam (1).used for the plant, high-rise building construction (2).used for the bridge, shipment building (3).used for lifting and transportat...View More
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Q235 Q355 A36 A572 ASTM I Beam Gr.50 Standard I Beam 6m 9m 12m Length