Key features

• Joint-less material
• Meets all technical standards
• Free from sharp edges
• High strength to weight ratio
• Cost affordability
• Wide dealer network
• Excellent resistance to torsion
• good for columns
• Can be filled with concrete to make Lally columns with improved fire rating

Applications

• Columns
• Welded steel frames
• Lally columns

Specifications

Specification: IS 1161 - 2004 | Nominal bore range: 15 mm to 100 mm NB (9 bore variants) | Thickness range: 2 mm to 5.4 mm | Classes: Light (L), Medium (M), Heavy (H) | Grades (Y.S min / T.S min / elongation): Yst 210: 210/330 MPa/20%; Yst 240: 240/410 MPa/17%; Yst 310: 310/450 MPa/14%; Yst 355: 355/490 MPa/10% | Outside diameter tolerance: Up to and incl. 48.3 mm: +0.4/-0.8 mm; over 48.3 mm: +/-1.0% | Thickness tolerance (welded tubes): +/-10% | Weight tolerance: Single tube +/-10%; 10 tonne lots +/-7.5% | Sulphur / phosphorus: 0.05% max each

Standards: IS 1161:2004