ASTM A500

ASTM A500 is a standard specification for cold-formed welded and seamless carbon steel structural tubing in round, square tube and rectangular tube shapes.

ASTM A500 steel pipes can be subjected to most of the usual fabricating operations. Ductility is good. It bends well, flattens, cuts, punches, flares and flanges easily, and can be welded by the commonly-used techniques and practices.

ASTM A500 Grade B
Applications: frames, roll cages, truck racks, trailers, railings, etc.
Workability: Easy to Weld, Cut, Form and Machine
Mechanical Properties: Brinell = 63, Tensile = 58,000 +/-,  Yield = 46,000 +/-

TYPICAL CHEMICAL PROPERTIES

TYPICAL MECHANICAL PROPERTIES

Difference:

ASTM A500 round tube, ASTM A500 square tube and ASTM A500 rectangular tube are not different in terms of material and performance, most of which are differences in cross-sectional shape and use.
Square pipes are mostly used in the construction and machinery manufacturing industries;
The rectangular tube is widely used as a pipeline for transporting fluids and manufacturing mechanical parts and engineering structures, firearms and cannons.
Compared with the round tube, the square tube has high compressive strength, low weight, and a wide range of applications.