AST PIPES brings to market the Grade YST 310 MS SHS AST YST 310 MS SHS - (135 x 135 x 8 mm) - 6 mtr Length, an IS 4923:2017-compliant ERW cold-formed square hollow section with 135 mm outer dimension, 8 mm wall thickness, and 6 m standard length. Certified to achieve a minimum yield of 310 MPa and UTS of 450 MPa, this section is optimised for heavy structural, high-load bearing and column applications requiring dimensional precision and weld integrity. Its square hollow form allows internal routing of cables and services while providing full structural functionality in framing and support applications.

• Cold-formed ERW square 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 square geometry enabling flush-face connections without packing plates
• Consistent internal dimensions suitable for sleeve joints and end-plate connections
• Surface free from major rolling defects for seamless paint or 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 applications
• Produced under controlled rolling and forming conditions for batch-to-batch consistency

• High-strength structural columns in multi-storey steel construction
• Main chord members in heavy roof trusses and long-span structures
• Industrial chimney, stack, and flare tower structural bracing members
• Structural columns in composite concrete-filled tube (CFT) construction
• Heavy conveyor gallery primary structural framing and support members
• Primary structural sections in shipbuilding and marine fabrications
• High-load industrial shelving uprights and heavy racking structures
• Structural portal frame columns and rafters in large industrial buildings