Flat bar are manufactured via rolling after billets are heated creating square-shaped products of appropriate toughness for spring materials. They are used in leaf springs for suspension systems on commercial vehicles like heavy duty trucks.
Round bars are manufactured by rolling after billets are heated creating rod shaped products of appropriate toughness for spring materials. They are used in coil springs, stabilizer bars and torsion bars in vehicle suspension system.
Peeled bars are rod shaped automobile spring materials processed by peeling the surface of wire rods. They are used for coil springs, stabilizer bars, and torsion bars in vehicle suspension system.
CGP bars are rod-shaped automobile spring materials created by grinding the surface of round bars. They are used for coil springs and stabilizer bars in vehicle suspension system.
Following the trends toward lighter weight in automobile, pipes are manufactured by welding skelp from slitted hot-rolled coil in a recent development for use in vehicle spring components. They are used as part of the stabilizer bars and torsion beams in vehicle suspension system.