Mild steel hollow sections, also known as structural steel tube or hollow structural sections, is a type of steel that is formed into a hollow tubular section. Mild steel hollow sections are categorized into three main types: rectangular hollow sections (RHS), square hollow sections (SHS) and circular hollow sections (CHS). Each type of hollow section has its own attributes and serves a specific purpose. Mild steel hollow sections are in both cold formed and hot finished grades, S275 and S355. Mild steel hollow sections are commonly used in a multitude of construction and mechanical applications, where they are used as frames, columns, railings and beams.

Sizes: SHS 20X20--1200X1200

RHS 20X30--1000X1200

CHS 20MM--1420MM

Applications

Uses of mild steel hollow sections include structural and construction applications, frames, railings, general fabrication, building supports, furniture, automotive, agricultural and manufacturing.

Grades of Hollow Section

Two of the common grades of mild steel hollow sections are EN10025 S275 and S355. EN10025 S275 is a popular low carbon structural steel grade suitable for various general engineering and construction applications. As a low carbon steel specifications, EN10025 S275 provides high tensile strength with good machinability and can be easily welded at low temperature settings. Mild steel grade S275 possesses good cold-forming properties and is used widely in the construction, industrial and engineering industries.

Mild steel grade EN10025 S355 is another widely used low carbon steel, which is suitable for a large number of structural applications. EN10025 S355 usually possesses hot-finished properties has greater mechanical resistance, as well as high yielding strength.