Q235 Q345 Hollow Section 160mm Square Steel Pipes 50X50 Structure Square Steel Tube ASTM A53 Pre Galvanized Square Steel Tube Price Per Kg FOB Price:US $
ASTM A 500|SQUARE AND RECTANGULAR HOLLOW SECTION|Each of the square and rectangular hollow sections shall be marked with the following information. a)manufacturer's name b)specification designation c)grade letter d)dimension e)heat number. Inspection and Testing. ASTM A500 is subject to specific inspection and testing. The test method shall be in accordance with ASTM A 370, ASTM A 751.