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About product and suppliers:
        Alibaba.com offers 48,206 square hollow section products. About 96% of these are steel pipes, 1% are aluminum profiles. 

A wide variety of square hollow section options are available to you, such as q195, q235, and 16mn. You can also choose from astm, api. As well as from erw, hot rolled, and cold rolled. And whether square hollow section is non-alloy, or is alloy. 

There are 48,087 square hollow section suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and Turkey, which supply 99%, 1%, and 1% of square hollow section respectively. 

Square hollow section products are most popular in Southeast Asia, South America, and Mid East. 

You can ensure product safety by selecting from certified suppliers, including 26,481 with ISO9001, 13,893 with Other, and 2,934 with ISO14001 certification.