The AST PIPES MS SHS AST YST 310 MS SHS - (135 x 135 x 5.4 mm) - 6 mtr Length is an ERW cold-formed square hollow section produced to IS 4923:2017 Grade YST 310 with outer dimensions of 135 mm and a wall thickness of 5.4 mm. Supplied in standard 6 m lengths, this section guarantees minimum yield strength of 310 MPa and tensile performance of 450 MPa for dependable heavy structural, high-load bearing and column applications. The biaxially symmetric square profile distributes compressive and bending loads equally on all axes, making it a versatile choice for structural column and framing applications.

• Manufactured to IS 4923:2017 Grade YST 310 with certified mill test documentation
• Minimum yield strength of 310 MPa ensuring structural design compliance
• Minimum ultimate tensile strength of 450 MPa for reliable load-bearing capacity
• ERW cold-forming process delivering consistent wall thickness on all four faces
• Square cross-section providing equal stiffness about both principal axes
• Smooth external surface finish suitable for painting, powder coating, or galvanizing
• Standard 6 m lengths enabling efficient transport, handling, and site cutting
• Excellent weldability on all four flat faces using MIG, TIG, and SMAW processes
• Tight dimensional tolerances for accurate fit-up in fabricated assemblies
• Closed hollow section resists torsional deformation under eccentric loading

• Heavy structural columns and primary beams in industrial complexes
• High-load transmission tower leg and main chord structural members
• Crane runway primary structural columns and crane girder supports
• Offshore and marine structural deck framing and column members
• Heavy machine bases and press foundations in manufacturing plants
• Primary structural members in multi-storey steel-framed buildings
• Bridge deck support framing and pedestrian bridge primary structure
• Heavy pre-engineered building primary frame rafters and columns