The AST PIPES MS RHS AST YST 310 MS RHS - (145 x 82 x 4.5 mm) - 6 mtr Length is an ERW cold-formed rectangular hollow section produced to IS 4923:2017 Grade YST 310, offering a 145 mm depth and 82 mm width with 4.5 mm wall thickness in standard 6 m lengths. Guaranteeing a minimum yield strength of 310 MPa and UTS of 450 MPa, this section delivers dependable structural performance for heavy structural, high-load bearing frames, and primary column applications. Its rectangular hollow form provides superior bending resistance in the dominant load direction while the closed section ensures excellent torsional stiffness in frame and support structures.

• 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 ensuring consistent wall thickness on all four faces
• Rectangular cross-section delivering superior major-axis bending resistance
• 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 beam assemblies
• Closed hollow section resisting torsional deformation under eccentric loading

• Heavy structural beams and primary spanning members in industrial complexes
• High-load transmission tower horizontal cross-arm structural members
• Crane runway primary girder beams and hoist beam structural members
• Offshore and marine structural deck beams and primary spanning members
• Heavy machine base spanning frames and press foundation beams
• Primary structural beams in multi-storey and high-rise steel buildings
• Bridge deck primary beam members and pedestrian bridge main girders
• Heavy PEB primary frame rafters and long-span structural sections