The AST PIPES YST 310 Rectangular Hollow Section AST YST 310 MS RHS - (130 x 73 x 4.5 mm) - 6 mtr Length is cold-formed and ERW-welded to IS 4923:2017 specifications, presenting a 130 mm x 73 mm outer dimension with 4.5 mm wall thickness in standard 6 m lengths. With guaranteed mechanical properties of 310 MPa yield and 450 MPa tensile strength, this RHS serves as a reliable structural component for heavy structural, high-load bearing frames, and primary column applications. The closed rectangular cross-section imparts excellent major-axis bending stiffness and torsional rigidity, enabling efficient span and cantilever designs with predictable structural performance.

• Grade YST 310 IS 4923:2017 certified RHS with guaranteed mechanical properties
• ERW process producing a continuous, sound weld seam along the full tube length
• Yield strength 310 MPa and tensile strength 450 MPa for design-critical structural applications
• Rectangular hollow geometry offering high section modulus-to-weight ratio
• Greater depth enables increased span capacity and reduced structural deflection
• Mill surface suitable for direct fabrication, painting, or hot-dip galvanizing treatment
• Available in a comprehensive range of sizes from light to heavy structural sections
• Standard 6 m lengths compatible with standard transport and storage infrastructure
• Good notch toughness and elongation properties for structural safety under impact loads
• Dimensional accuracy per IS 4923 tolerances ensuring interchangeable and reliable fit-up

• Primary structural spanning beams in warehouses and distribution centres
• Long-span truss chord members in airport terminals and exhibition pavilions
• Heavy structural beam framing in power stations and process plant facilities
• Structural sections for oil and gas platform topsides and primary deck beams
• Rail over-bridge and road bridge primary structural beam spanning members
• Heavy crane gantry spanning girders and crane main structural beam members
• Primary structural beams in stadiums, arenas, and long-span grandstand roofs
• Structural spanning sections in high-rise building perimeter and core frames