... rolledCold rolledSurface treatmentCopper coatedGalvanizedothersortingStructural pipe, fluid pipe, boiler pipe, oil pipe, gas pipe, API pipe, alloy steel pipe, carbon steel pipe and so on. ... 140mmProduction technologyHot rolledCold rolledsortingPressure vessel plate, high strength low alloy, structural steel for bridge, structuralsteel for ship ... 309S,310,310S,430,409specificationRound Square rectangle