Cold rolled steel sheet is, essentially, hot rolled steelthat has been further processed to increase its strength and strength-to-weightratio. In general, cold rolled steel sheet can hold tighter tolerances than hotrolled when machined or otherwise fabricated, and provides a better overallsurface finish.
Cold rolling is used to further treat hot rolled steel sheetto increase its strength and its strength-to-weight ratio and enable it to holdtighter tolerances during fabricating and machining. In addition, cold rollingis used to smooth and finish the surface of hot rolled steel. The processesused to improve the surface finish and to size the cold rolled sheet moreprecisely include chemical or mechanical descaling and cold rolling orpolishing. It also increases its strength and hardness because it is performedat room temperature and below the recrystallization temperature.
Cold rolled steel sheet is used for engineered products thatrequire tight tolerances and coated surfaces. Parts that require crimping,bending, swaging and other types of cold forming are typically cold rolled.
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