Hot Rolling Equal & Unequal Steel Angles
The continuous rolling process for L-section angles used in trusses, towers and general fabrication.
Steel angles are produced on continuous bar/section mills using a sequence of grooved rolls that progressively turn a square billet into an open L-section.
1. Billet Heating
Square billets (typically 130×130 mm) are reheated to 1100–1180 °C.
2. Sequential Grooved Passes
Each stand has a pair of rolls with mirror-image grooves. The billet is alternately rolled flat, on edge, and finally through a 90° L-shaped pass that defines the angle's leg length and thickness. For unequal angles, the finishing pass has asymmetric leg cavities.
3. Cooling & Straightening
Sections drop onto a walking cooling bed, then are roller-straightened to remove twist and bow — important for downstream fabrication where bolt holes must align over long lengths.
4. Cut-to-Length & Bundling
Bars are cold-sawn to 6 m or 12 m, end-stencilled, and tied into hexagonal bundles for stable shipping.
Steel Angles
Equal and unequal L-section angles for fabrication.
