Definition of Cold Rolled Commodity Coils
Cold Rolled Commodity Coils are steel coils which are usually fabricated using hot rolled steel products. The coils have undergone subsequent processes such as cold rolling, galvanizing, painting and electroplating to produce different finished products such as panels, pipes and sheets. Cold Rolled Commodity Coils are available in various widths, thickness and finishes such as galvanized, plain or coated. The majority of cold rolled commodity coils that are produced come from strip mills, which roll the hot rolled strip from a billet or slab. They are subjected to further processing such as annealing, pickling and cold rolling in order to produce a finished coil.
Cold Rolled Commodity Coils are used for a wide variety of applications, including construction, automotive and industrial processes. The cold rolled processing method allows for tighter tolerances than hot rolling, which results in a more consistent product with increased strength. Due to the higher strength, cold roll steel is often used for lintels, garage doors, roof decking and other structural applications. Cold rolled steel coils are also used extensively in automotive and industrial applications such as body panels, chassis, mechanical components and tubing.
The quality of Cold Rolled Commodity Coils varies based on the processing and manufacturing steps. Cold rolled coils are usually passivated using a combination of chromed, nickel and chrome plating, thus increasing their resistance to corrosion. The surface finish should also be consistent and uniform throughout the length of the coil. A good quality coil will have a uniform surface finish, as well as consistent mechanical properties, such as tensile strength, shallow hardness and elongation. The surface should also be smooth, free from visible defects and with no surface rust.
The quality assurance of Cold Rolled Commodity Coils is critical for producing reliable products for the intended application. Quality assurance begins with the selection of the raw material and the observation of the processing from the incoming billet to the finished coil. Process control and inspection should be performed throughout to ensure that the desired properties are achieved and to detect product defects at the earliest stages of production before they are allowed to be released to the customer.
Cold Rolled Commodity Coils are used for a wide variety of applications across many industries and are an important part of the production chain of many products. In order to ensure the quality of these products, manufacturers need to carry out rigorous quality control process during their production. This includes an evaluation of the incoming material, process control and continual product inspection, which are essential steps that ensure that the finished product meets the required standards and specifications.
