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9473 channel steel bar sizes products are offered for sale by suppliers on Alibaba.com, of which steel channels accounts for 7%, stainless steel channels accounts for 2%, and steel angles accounts for 1%. A wide variety of channel steel bar sizes options are available to you, such as punching, cutting and welding.You can also choose from aisi, astm and gb channel steel bar sizes,as well as from c, c channel, and u channel channel steel bar sizes, and whether channel steel bar sizes is q235, carbon steel, or galvanized steel.