Difference between 2B and 2D stainless steel sheet

Stainless steel has become a widely used metal material for its excellent corrosion resistance, good mechanical properties and machining properties. Different processing methods and cold rolling after processing, stainless steel surface can have different levels of surface finish, grain and color. The surface processing of cold-rolled stainless steel plate has 2D, 2B, No.3, No.4, 240, 320, No.7, No.8, HL, BA, TR hard state, embossed surface grade. It can be further applied to electroplating, electropolishing, undirected hairline, etching, shot peening, coloring, coating and other deep-processing surfaces based on the cold-rolled stainless steel. Stainless steel cold rolled sheet is widely used in construction, decoration, home appliances, rail transportation, automobile, elevator, container, solar energy, precision electronics and other fields, including construction, decoration, elevator, container and other products directly use 2D, 2B, BA, grinding and another surface after cold rolling processing, and household appliances, rail transportation, automobiles, solar energy, precision electronics and other industries often use direct processing of cold-rolled stainless steel plate or shallow grinding and polishing stainless steel plate.

 

No.2D stainless steel sheet

No.2D is a kind of cold-rolled dull surface without an oxide scale. After cold rolling, it only goes through heat treatment and pickling. The brightness of its surface is determined by the degree of deformation of cold rolling and the finish of the work roll surface of the finished product pass, and it is also related to the pickling method of removing oxidation. No.2D surface also includes a rough surface roller for light leveling on the above basis. The rough surface roll is a special process to coat the surface of the roll, that is, a number of phase change hard particles are formed on the surface of the roll, and the uneven surface structure is realized on the surface of the steel plate during the leveling process. This kind of surface is suitable for the deep drawing forming process, can improve the friction and contact condition between steel plate and die, is conducive to material flow, improve the forming quality of the workpiece. No.2D surface stainless steel is widely used in building curtain walls, especially those parts of the building that do not require reflection. The roughness Ra of the surface measured by the instrument is about 0.4 ~ 1.0μm.

 

No.2B stainless steel sheet

The most difference between No. 2B and the 2D surface is that No 2B have a smooth process of leveling roll, it looks more light compared with the 2D surface, the instrument measuring the surface roughness of the Ra value is 0.1 ~ 0.5 mu m, is the most common process and have the most extensive application, suitable for the chemical industry, papermaking, oil, medical and other general purposes, also used for building wall.

Appearance	Features	Colour	Process	Applications
NO.2D	The surface is even and matte	Shiny silver white	Hot rolling + annealing shot peening pickling + cold rolling + annealing pickling	2D is suitable for non-strict surface requirements, general purposes, deep stamping processing, such as automotive components, water pipes, etc
NO.2B	More gloss than NO.2D	Silvery white with better gloss and finish than 2D surfaces	Hot rolling + annealing peening pickling + cold rolling + annealing pickling + quenching and tempering rolling.NO.2D treatment is followed by a final mild cold rolling with a polishing roller, which is the most commonly used surface finish	General applications such as tableware, building materials, etc.