Cold Rolled Squares has low-carbon steel with high manganese content which is better for carburized parts since it produces a harder and more uniform case. It also has higher mechanical properties and better machining characteristics.
Most cold finished bars are produced by cold drawing. In this process, oversize hot rolled bars, which have been cleaned to remove scale, are drawn through dies to the required size. The larger sizes are generally turned and polished, the hot rolled bars having been machine turned, rather than drawn, followed by abrasive polishing.
A greater degree of dimensional accuracy and straightness in round bars is obtained by grinding and polishing.
APPLICATIONS Suitable for parts requiring cold forming, such as crimping, or bending. However, for severe bends, stress relieving may be necessary to prevent cracking. Especially suitable for carburized parts requiring soft core and high surface hardness, such as gears, pinions, worms, king pins, chain pins, ratchets, etc.
WELDABILITY This grade is easily welded by all the welding processes, and the resultant welds and joints are of extremely high quality. The grade of welding rod to be used depends on the thickness of section, design, service requirements, etc.