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grade: 10#-45#, api j55-api p110, q195-q345, st35-st52, 10#, 20#, api l80, q195, q215, q235, st37 thickness: 0.6 - 12 mm section shape: square outer diameter: 15-400mm place of origin: hebei, china (mainland) secondary or not: non-secondary application: structure pipe, building plant, bridge, construction, technique: erw certification: api surface treatment: galvanized alloy or not: is alloy materials: square pipe steel certificate: iso9001;ce;fpc;jis;astm;en;asme;jis;bs brand: baosteel angang tisco hbis surface: oiled, shop promed, galvanized, colour, black paint commodity: steel building structure keyword: steel structure building delivery time: 5days at least shape: square quality assure: ciq-sgs-bv-iso.