RR MetalMakers's RR MetalMakers YST 310 MS RHS - (40 x 20 x 4.5 mm) - 6 mtr Length is a high-quality cold-formed Rectangular Hollow Section in YST 310 grade structural steel, produced to IS 4923:2017 (Hollow Steel Sections for Structural Use). The 40 mm × 20 mm × 4.5 mm cross-section in 6 m lengths is engineered to provide high yield strength for critical load-bearing structures, outstanding weldability, and consistent wall distribution — critical for heavy engineering, crane structures, and high-load frameworks. Each section is sourced from prime quality HR coils, processed through precision roll-forming and ERW welding for assured structural integrity.

• Grade YST 310 steel with minimum yield strength of 310 MPa and tensile strength of 450 MPa
• Rectangular hollow profile 40 mm × 20 mm × 4.5 mm for superior bi-axial bending resistance
• Uniform wall thickness of 4.5 mm throughout the full 6 m length
• Cold-formed ERW manufacturing process ensuring consistent weld seam quality
• Conforms to IS 4923:2017 — IS-marked with full batch certification
• High strength-to-weight ratio minimising steel usage without compromising performance
• Excellent weldability — compatible with MIG, TIG, and SMAW processes
• Tight dimensional tolerances: width, depth, wall thickness within IS permissible limits
• Square-cut ends for precise measurement and easy joint fitting on site
• Smooth, mill-finish external surface suitable for painting, galvanizing, or powder coating

• Structural columns, beams, and bracing members in industrial and commercial buildings
• Pre-Engineered Building (PEB) frameworks, roof purlins, and wall girts
• Trusses and lattice girders for long-span roof and bridge structures
• Mezzanine floors, equipment platforms, and access walkways
• Agricultural structures, greenhouses, and storage sheds
• Conveyor support frames, material handling gantries, and overhead cranes
• Fencing, gates, road barriers, and perimeter security structures