Cold Formed Steel
Cold formed steel sections are the name or term given to end products that has been rolled or pressed from sheet metal (or coils) into the desired shape. Steel sheets are deformed using rolling, stamping or pressing to deform the sheet or coil of steel to the end product.
The rolling, pressing or stamping of cold formed steel occurs at room temperature. End products include items such as structural tubing, lip channels, purlins, open channels as well as cold formed open profiles and closed profiles.
When steel is formed by press-braking or cold-roll forming, there is a change in the mechanical properties of the material by virtue of the cold working of the metal. When a steel section is cold-formed from a flat sheet or strips the yield strength, and to a lesser extent the ultimate strength, is increased as a result of this cold working, particularly in the bends of the section. Cold-formed steel sections tend to be more sensitive to local buckling effects than typical hot rolled sections.
Cold formed steel sections and profiles are used in a variety of industries which include the following:
Type of cold formed section
|Construction||Lipped Channels, Zed Profiles, Top Hats, Structural Steel Tubes|
|Trailer Manufacturing||Steel Tubes, Top Rail Open Profiles, Side Rail Open Profiles, Cross Members|
|Doors and Windows||Shutter Door Guides, Steel Tubing|
|Agricultural||Pressure Tested Steel Tubes, Z275 Pre-Galvanized Steel Tubes|
|Racking & Shelving||Steel Tubes, Bottle Sections, Sigma Beams, Lip Channels|
|Fencing & Security||Steel Tubes, Open Profiles, Lip Channels, Open Channels|
|Automotive||Annealed Steel Tubes, 3CR12 Stainless Steel Tubing, Open Channels|
|Electrical Contractors||Z450 Pre-Galvanized Steel Conduit|
|Mining||Steel Tubes and Profiles, Conveyor Tubes, Lancing Tubes|
Cold formed steel sections can be easily distinguished from hot formed sections. A hot formed section often has thick webs and flanges, whilst cold formed steel is in comparison thin and slender. An example of a cold formed steel open channel can be seen on the left while the red coloured picture on the right shows dimensions for a hot formed steel channel. Sections can be visualized as series of plates connected at the corners. When the steel plates endure compression buckling it is likely to occur in the plane of the plate. In the section, compressive forces develop as a result of direct compression in columns and struts or flexural compression in beams.
Tubecon cold forms and supplies our steel tubes, lip channels and open channels to the above mentioned industries and many more in South Africa. Tubecon roll-forms our steel coils into the desired shape, welded or open, as requested by our customers. Tight tolerances can be achieved on all cold formed steel sections and profiles that Tubecon manufactures.
The table below indicates some of the advantages of cold formed steel tubes and open channels.
Properties of cold formed steel sections
|Lightness in Weight||Recyclable Material|
|High Strength Stiffness||Uniform Quality|
|Non Shrinking at Ambient Temperatures||Very Accurate Detailing|
|Non-Combustibility||Easy Fabrication and Mass Production|