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About product and suppliers:
        Alibaba.com offers 228,287 square steel tube products. About 46% of these are steel pipes, 13% are stainless steel pipes, and 1% are structural steel. 

A wide variety of square steel tube options are available to you, such as 16mn, 1cr13mn9ni1n, and 10cr9mo1vnb. You can also choose from astm, api, and gb. As well as from structure pipe, gas pipe, and fluid pipe. And whether square steel tube is square, rectangular, or round. 

There are 228,201 square steel tube suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Japan, and Singapore, which supply 99%, 1%, and 1% of square steel tube respectively. 

Square steel tube products are most popular in Southeast Asia, Mid East, and South America. 

You can ensure product safety by selecting from certified suppliers, including 87,728 with ISO9001, 31,447 with Other, and 12,632 with ISO14001 certification.