AST YST 310 Heavy Duty 65 NB MS Round Pipe - (4.5 x 76.3 mm) - 6 mtr Length is a Heavy Duty ERW mild steel round pipe manufactured from YST 310 steel fully conforming to IS 1239:2004 (Mild Steel Tubes, Tubulars, and Other Wrought Steel Fittings), delivering a minimum yield strength of 310 MPa and tensile strength of 450 MPa for heavy-duty structural, high-pressure, and critical engineering applications. The 4.5 mm wall × 76.3 mm OD (65 NB) cross-section in 6 m standard lengths features thicker wall construction delivering maximum pressure rating and superior mechanical strength, ensuring reliable dimensional accuracy and consistent mechanical performance across plumbing, structural, and general engineering installations. Produced by AST PIPES, each IS-certified tube carries full batch traceability and is designed for direct use in welded, threaded, and flanged connection systems.

• Grade YST 310 steel: minimum yield strength 310 MPa, minimum tensile strength 450 MPa
• Heavy Duty classification per IS 1239:2004: engineered for high-pressure fluid service and heavy structural loading conditions
• Pipe dimensions: 76.3 mm OD × 4.5 mm wall (65 NB) — consistent throughout 6 m length
• Cold-formed ERW manufacturing ensuring high-integrity, flush weld seam quality throughout
• Conforms to IS 1239:2004 — IS-marked with full batch mill certification on every supply lot
• Smooth internal bore for efficient, low-friction fluid and gas conveyance under all conditions
• Excellent weldability — compatible with MIG, TIG, SMAW, and orbital welding processes
• Compatible with IS-standard threaded fittings, flanges, and couplings for 65 NB
• Square-cut ends for precise measurement and clean joint preparation on site
• Smooth mill-finish external surface suitable for painting, galvanising, or powder coating

• Water supply and distribution pipelines in residential, commercial, and industrial buildings
• Gas conveyance lines for domestic, commercial, and light industrial installations
• Structural columns, posts, and compression struts in construction and fabrication frameworks
• Fire-fighting water mains, wet riser systems, and automatic sprinkler pipework
• Agricultural irrigation networks, pump discharge lines, and water distribution mains
• Handrails, balustrades, safety guardrails, and pedestrian barrier systems
• Scaffolding standards, shoring props, and temporary support structures on site