Hot Finished Circular Hollow Sections - 323.9x8.0

Hot-finished circular hollow sections (CHS) are seamless or welded tube-shaped steel pipes manufactured at very high temperatures, usually around 1,000°C. Because they are shaped while the steel is red-hot, the metal cools evenly, eliminating the internal structural stresses often found in cold-formed pipes. This uniform structure makes them highly reliable under heavy loads, easier to weld, and less likely to crack when bent or modified. Their smooth, round shape offers exceptional resistance to twisting and uniform strength from all angles, making them the preferred choice for heavy-duty columns, bridges, offshore structures, and demanding architectural projects.

Dimensions

PropertyValue
D mm323.9
t mm8
kg/m62.3
A cm279.4

Full sortable table: Dimensions table for this category

Section Properties

PropertyValue
Ratio for Local Buckling - D/t40.5
Second Moment of Area - I cm49910
Radius of Gyration - r cm11.2
Elastic Modulus - Z cm3612
Plastic Modulus - S cm3799
Torsional Constants - J cm419800
Torsional Constants - C cm31220
Surface Area (Per Metre) - m21.02
Surface Area (Per Tonne) - m216.3

Full sortable table: Properties table for this category