Cold rolled steel is essentially hot rolled steel that has had further processing. The steel is processed further in cold reduction mills, where the material is cooled (at room temperature) followed by annealing and/or tempers rolling. This process will produce steel with closer dimensional tolerances and a wider range of surface finishes. The term Cold Rolled is mistakenly used on all products, when actually the product name refers to the rolling of flat rolled sheet and Cold drawing increases the yield and tensile strengths, often eliminating further costly thermal treatments.

All cold products provide a superior surface finish, and are superior in tolerance, concentricity, and straightness when compared to hot rolled.

Cold finished bars are typically harder to work with than hot rolled due to the increased carbon content. However, this cannot be said about cold rolled sheet and hot rolled sheet. With these two products, the cold rolled product has low carbon content and it is typically annealed, making it softer than hot rolled sheet.

Uses: Any project where tolerances, surface condition, concentricity, and straightness are the major factors

SUP 9Aspring steel features and scope highstrength, ductility and toughness / harden ability thermal sensitivity better than manganese steel & lower than silico-manganese steel - decarburization tendency smaller than silico-manganese steel temper brittleness for the production of heavy stress load larger leaf springs and larger diameter coil spring.