A guide to HSS

    HSS, short for Hollow Structural Steel, is generally produces by cold-formed technique. The most common seen cold-formed methods are:

    1. Cold-forming into a round shape at first, closing the section using electric resistance welding (ERW), and then potentially cold-shaping into a square or rectangular section. Products can be complied with ASTM A500 (ASTM, 2013), A847 (ASTM, 2014a), A1085 (ASTM, 2015a), CSA G40 (CSA, 2013) or even the ASTM A53 (ASTM, 2012) pipe specification.

    2. Cold-forming into a square or rectangular shape directly, and closing the section using electric resistance welding. Products can be be complied with ASTM A500, A847 or A1085 specifications.

    3. Cold-forming directly to a square or rectangular shape, and closing the section using submerged arc welding (SAW).

    Hollow Structural Steel should conform to ASTM A1065

    http://www.xysteelpipe.com/info/A-guide-to-HSS-517-1.htm

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