The AST YST 310 Heavy Duty 50 NB MS Round Pipe - (4.5 x 59.7 mm) - 6 mtr Length manufactured by AST PIPES is a prime-grade Heavy Duty ERW round pipe in YST 310 mild steel aligned with IS 1239:2004 (Mild Steel Tubes, Tubulars, and Other Wrought Steel Fittings). Offering a 59.7 mm OD × 4.5 mm wall profile (50 NB) in 6 m standard lengths, this pipe delivers minimum yield of 310 MPa, excellent ductility, and thicker wall construction delivering maximum pressure rating and superior mechanical strength — making it the preferred round tube for heavy-duty structural, high-pressure, and critical engineering applications. The circular cross-section provides uniform hoop strength and equal bending resistance in all directions, ideal for structural columns, struts, and pressurised fluid systems.

• Minimum yield: 310 MPa | Minimum tensile: 450 MPa — per IS 1239:2004
• Heavy Duty pipe: 59.7 mm OD × 4.5 mm wall (50 NB) — engineered for high-pressure fluid service and heavy structural loading conditions
• IS 1239:2004 compliance with IS marking — guaranteed quality and dimensional assurance
• Cold-formed process for tight dimensional tolerances, consistent roundness, and clean bore
• Standard 6 m lengths compatible with standard plumbing and structural grid spacings
• Suitable for hot-dip galvanising, electrostatic powder coating, and epoxy lining options
• Threaded ends available to IS 554 specification for screwed and socket plumbing systems
• Compatible with IS-standard elbows, tees, reducers, unions, and flanged fittings throughout
• Prime HR coil input ensuring uniform grain structure and consistent mechanical properties
• Batch-identifiable pipes for quality traceability throughout the project lifecycle

• Municipal water transmission mains and utility distribution pipelines
• Industrial process piping for fluid, slurry, and chemical transport systems
• Structural column sections and truss chord members in light and medium frameworks
• Solar panel mounting structures and photovoltaic ground-mount array supports
• Overhead water tanks, pump house piping, and elevated service line installations
• Road and highway guard rail supports, signpost foundations, and street furniture
• Workshop jigs, fixture frames, and general fabrication support structures on site