The AST YST 210 25 NB MS CHS - (33.7 x 4 mm) - 6 mtr Length is a structurally certified Circular Hollow Section from AST PIPES in YST 210 mild steel, manufactured to IS 1161:2014 (Steel Tubes for Structural Purposes). This 33.7 mm OD × 4 mm wall (25 NB) CHS in 6 m standard lengths is a small-diameter circular section suited to handrails, light frames, and secondary structural members providing equal-axis bending resistance, excellent torsional rigidity, and a high strength-to-weight ratio — ideally suited for light-to-medium structural, architectural, and utility applications. With minimum yield of 210 MPa and tensile of 330 MPa, it supports efficient structural design with optimised section sizes and reduced material usage.

• Certified YST 210 ERW CHS meeting all structural requirements of IS 1161:2014
• Precise 33.7 mm OD with 4 mm wall: consistent roundness and flush seam throughout
• Wall thickness 4 mm maintained within tight IS tolerances along the full 6 m length
• Consistent ERW weld quality: clean, flush seam on both internal and external surfaces
• Tensile strength 330 MPa for reliable performance under structural design loads
• Standard 6 m cut lengths with square ends for accurate joint detailing and fit-up
• Suitable for structural columns, struts, braces, trusses, and architectural applications
• Weld-ready surface with minimal surface scale from prime coil inputs
• Equal bi-directional bending capacity simplifies structural analysis and design
• Full quality documentation: heat number, grade, dimensions, and mechanical report available

• General engineering fabrication: frames, supports, and structural insert components
• Event and exhibition rigging towers, stage truss structures, and temporary grandstands
• Carport canopy columns, pergola uprights, and outdoor shade structure frameworks
• Residential and commercial staircases, balustrade uprights, and glass balcony posts
• Electrical substation structures, cable tray supports, and instrument stanchions
• Multi-level car park columns, flyover parapet posts, and elevated roadway supports
• Conveyor support gantries, overhead crane rails, and material-handling column sections