ASTM A500 Rectangular Hollow Section

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ASTM A500 rectangular hollow section

ASTM A500 Standard Specification for Cold-Formed Welded and Seamless Carbon Steel Structural Tubing in Rounds and Shapes

Test for ASTM A500 rectangular hollow section

There are different manufacturing process for rectangular hollow section

First, Electric Resistance Welding (ERW) Process

In the tube mill, flat steel strip is formed continuously around its longitudinal axis to produce a round tube. This is done by moving the strip through a progressive set of rolls. The strip edges are

heated by either high frequency induction or contact welding and then forged together by weld rolls to create a continuous longitudinal weld without the addition of filler metal. The weld seam is then cooled and processed through a set of sizing/shaping rolls which cold-form it into a round, square or rectangular section

Second, Form-Square Weld-Square (ERW) Process

In the weld mill, driven forming dies progressively shape the flat strip by forming the top two corners of the square or rectangular tube in the initial forming station. Subsequent stations form the bottom two corners of the shape. No cold working of the sides of the shape is performed, and the shape’s seam is welded by high-frequency contacts when the tube is near its final shape and size. The welded tube is cooled and then driven through a series of sizing stations which qualifies the tube’s final dimensions.

Third, Submerged Arc Weld (SAW) Process

Two identical pieces of flat strip are placed in a press brake and formed into two identical halves of a finished tube size. A backup bar is tack welded to each leg of one of the half-sections. The two half sections are fitted together toe-to-toe and welded by the submerged arc process to complete the square or rectangular section.

APPLICATIONS BY INDUSTRY of ASTM A500 rectangular hollow section

CONSTRUCTION & HEAVY EQUIPMENT

Cranes, Frames, Roll-Over Protective Structures (ROPS), Numerous Types of Construction Equipment – Bulldozers, Excavators, Steam Rollers, etc.

AGRICULTURE

Cranes, Frames, Roll-Over Protective Structures (ROPS), Numerous Types of Agricultural Equipment – Combines, Sprayers, Harvesters, Tractors, etc., Greenhouse Structures

INFRASTRUCTURE

Columns, Bridges, Buildings, Towers, Signs, Awnings

FLUID HANDLING

Pump Bases, Hydraulic Brackets, Spacers

MACHINERY

Machine Bases, Machine Frames

OIL & GAS

Off-Shore Drilling Platforms, Off-Shore Production Equipment, Tooling Racks

ENERGY

Solar Brackets and Bases, Solar Racking, Power Plants

GENERAL FABRICATION AND MACHINING

Racks, Spacers, Bases, Numerous other general welding and machined applications

AUTOMOTIVE & TRANSPORTATION

Auto & Truck Frames, Trailers Truck Bases, Rail Cars, Automotive Racks, Carports

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