Conforming to IS 4923:2017 Grade YST 310, the AST PIPES MS RHS AST YST 310 MS RHS - (71.75 x 55.75 x 3 mm) - 6 mtr Length is a precision cold-formed rectangular hollow section with a 71.75 mm depth, 55.75 mm width, and 3 mm wall thickness over a 6 m mill length. This ERW-welded tube achieves a minimum yield of 310 MPa and UTS of 450 MPa, making it ideal for heavy structural, high-load bearing frames, and primary column applications. The closed rectangular cross-section combines high bending stiffness in the primary loading direction with excellent torsional rigidity, enabling efficient structural spanning and framing solutions.

• Cold-formed ERW rectangular hollow section to IS 4923:2017 Grade YST 310
• Four flat external faces providing maximum bearing area for connection hardware
• Minimum 310 MPa yield and 450 MPa UTS meeting structural design requirements
• Precise rectangular geometry enabling flush-face connections without packing plates
• Consistent internal dimensions suitable for sleeve joints and end-plate connections
• Surface free from major defects for seamless paint or hot-dip galvanizing adhesion
• 6 m standard length for efficient stacking, handling, and transportation logistics
• Suitable for cold punching, drilling, sawing, and plasma cutting on-site
• Closed cross-section superior to open sections in torsion-critical beam applications
• Produced under controlled rolling and forming conditions for batch-to-batch consistency

• High-strength primary beams in multi-storey structural steel construction
• Main chord spanning members in heavy roof trusses and long-span structures
• Industrial chimney, stack, and flare tower horizontal bracing beam members
• Primary spanning beams in composite concrete-filled tube construction systems
• Heavy conveyor gallery spanning beams and primary structural frame members
• Structural beams in shipbuilding, marine fabrication, and deck structures
• High-load industrial shelving primary beams and heavy racking cross members
• Structural portal frame rafters and primary spanning members in large buildings