AST YST 310 350 NB MS CHS - (355.6 x 8 mm) - 6 mtr Length
AST YST 310 350 NB MS CHS - (355.6 x 8 mm) - 6 mtr Length
Specifications
| Diameter | 355.6 mm |
|---|---|
| Length | 6 m |
| Nominal Bore | 350 NB |
| Thickness | 8 mm |
Description
AST YST 310 350 NB MS CHS - (355.6 x 8 mm) - 6 mtr Length is a cold-formed ERW Circular Hollow Section manufactured from YST 310 mild steel fully conforming to IS 1161:2014 (Steel Tubes for Structural Purposes), delivering a minimum yield strength of 310 MPa and tensile strength of 450 MPa for heavy-duty structural, high-load, and long-span applications. The 355.6 mm OD × 8 mm wall (350 NB) cross-section in 6 m standard lengths provides a large-bore circular section designed for major structural columns, crane structures, and heavy industrial frameworks, with uniform hoop strength, equal bending resistance in all directions, and superior torsional rigidity. Produced by AST PIPES from prime HR coil, each IS-certified tube carries full batch traceability for assured structural performance across all installation types.
Key Features:- Grade YST 310 steel: minimum yield strength 310 MPa, tensile strength 450 MPa
- Circular hollow profile 355.6 mm OD × 8 mm wall — equal stiffness and bending resistance in all directions
- Uniform wall thickness of 8 mm maintained throughout the full 6 m length
- Cold-formed ERW manufacturing ensuring high-integrity, flush weld seam quality
- Conforms to IS 1161:2014 — IS-marked with full batch mill certification
- High strength-to-weight ratio enabling slender, efficient structural and architectural sections
- Excellent weldability — compatible with MIG, TIG, SMAW, and orbital welding processes
- Nominal bore 350 NB: compatible with standard flanges, couplings, and saddle connections
- Square-cut ends for precise measurement and clean joint preparation on site
- Smooth mill-finish external surface suitable for painting, galvanising, or powder coating
- Structural columns, posts, and compression struts in industrial and commercial buildings
- Pre-Engineered Building (PEB) columns, bracing members, and diagonal struts
- Circular truss chord members and web diagonals in roof and bridge trusses
- Handrails, balustrades, stair stringers, and safety guardrail systems
- Gate posts, fencing columns, bollards, and perimeter security structures
- Flagpoles, lighting columns, signage poles, and street furniture supports
- Scaffolding standards, shoring frames, and temporary support structures
Specifications
| Base | Detail |
|---|---|
| Diameter | 355.6 mm |
| Length | 6 m |
| Nominal Bore | 350 NB |
| Thickness | 8 mm |
Mechanical & Chemical Composition
Main Specifications
| Base | Detail |
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Chemical Composition
| Base | Detail (%) |
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