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19133 carbon steel structural round bar products are offered for sale by suppliers on Alibaba.com, of which steel round bars accounts for 74%, steel square bars accounts for 1%, and steel flat bars accounts for 1%. A wide variety of carbon steel structural round bar options are available to you, such as cutting, bending and welding.You can also choose from carbon steel, alloy steel and stainless steel carbon steel structural round bar,as well as from gb, jis, and din carbon steel structural round bar,and whether carbon steel structural round bar is is alloy, or non-alloy.