![]() ![]() The hardening is done by means of temper rolling on polished rolls. ![]() Here, the metal is cold worked after the cold rolling process in order to obtain improved strength. This one is a little different from the rest of the mill finishes. The inner part of washing machines and dishwashers.Also for applications where reflection is important but its precision is not. The 2R, also known as BA stainless steel, is commonly used for domestic applications. This easy-to-clean finish has a typical Ra between 0.05…0.1 micrometers. It is very smooth and less likely to harbour airborne contaminants and moisture compared to any other mill finishes. The resulting stainless steel finish is capable of reflecting clear images. It consists of annealing the steel under oxygen-free conditions to protect it from oxidation and scaling. In this case, we have the bright annealing process added. Common applications for the 2B stainless steel finish include, but are not limited to:ĢR Finish – Cold Rolled, Bright Annealed & Skin PassedĪgain, there is only a small difference with previously described surface finishes. So the result is a smooth, slightly to moderately reflective surface with good flatness control.ĭue to its dull grey and not very reflective appearance, it is only used in architecture when uniformity of finish is not a requirement. The typical average roughness obtained is between 0.1 and 0.5 micrometers. That step is rolling it one final time with highly polished rolls known as bright rolls. The difference is that there is an extra step in producing 2B stainless steel surface. Common applications for 2D stainless steels are:ĢB Finish – Cold Rolled, Annealed, Pickled & Skin PassedĪnother cold rolled stainless steel where the process is similar to producing 2D. It can also be used for some industrial and engineering needs with less critical aesthetics. Similarly to the 1D surface finish, the 2D can be the starting point for polished finishes. The surface finish has a low reflective matt appearance with typical average roughness values ranging from 0.4 to 1.0 micrometers. In this case, pickling is necessary because annealing is performed to remove stress and reduce the hardness resulting from cold rolling. The annealing and pickling processes improve its characteristics in a similar way as with the 1D stainless steel. Some examples include:ĢD Surface Finish – Cold Rolled, Annealed & PickledĪs this steel is cold rolled rather than hot rolled, the surface finish is more refined. Thus, the visual appearance is not always relevant. However, common applications of this stainless steel surface finish involve non-decorative purposes. The resulting surface is slightly coarse with very low reflectivity and a typical average roughness (Ra) between 4…7 micrometers.ġD stainless steel is sometimes used as the starting point for polished finishes. Scales form during the previous processes, hot rolling and annealing. This process consists of cleaning the surface with acid to remove the scales. This makes it more ductile and workable.Īfter the annealing process, the 1D stainless steel is ready for the last step to achieve the designated finish – pickling. Annealing consists of heating the steel and letting it cool down slowly to remove internal stress and reduce hardness. 1D Stainless Steel Finish – Hot Rolled, Annealed & PickledĪfter the steel is hot rolled in the mill, it is then put through a heat treatment called annealing. Here is an in-depth description of the stainless steels that fall into this group according to the table above. However, most of these steels require further finishing processes to meet the requirements of certain applications. Mill finish is the basic supply condition for stainless steels, no matter whether they are cold or hot rolled. Generally coated with tin, aluminium or titanium. Colour is obtained by a chemical process. Both sides with corrugated texture, used to increase strength and/or for aesthetics.Ĭolours upon agreement. Fine texture is mainly used for architectural applications.ĭesign upon agreement. Plates used on floors.ĭesign upon agreement. Uniform non-reflective matt surface.ĭesign upon agreement. Bright annealing or annealing and pickling. Cold rolled, heat treated, and skin passed on roughened rolls. ![]()
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