![]() ![]() #2D – Annealed, pickled, and passivated.#2 –The #2 finish can be divided into multiple subcategories.The surface is passivated, or covered by a thin inert layer. #1 – The #1 finish is also for thicker hot-rolled plates.It lets the metal anneal (slowly cool) to form a rough finish. #0 – This finish is typically used for thicker hot-rolled plates.The different types are measured on a scale ranging from 0-10: The term “ Pickled” means that the material has been subjected to an acid solution that has been specifically developed to remove the high temperature oxides that appear on the surface after annealing.Ī variety of finish types can be applied to most stainless steel. HRAP ( Hot Rolled Annealed & Pickled) Steel Mill Process.430, on the other hand, develops a hard oxidized surface layer and is more difficult to polish. 304 is a basic type of stainless steel and one of the simplest to polish. The hardness of the new layer can disrupt the polishing process if operators aren’t moving fast enough.ĭifferent grades of stainless steel can also simplify or increase the complexity of the polishing process. While abrasive polishing cuts through that layer, it is quickly replaced by a new layer of oxidized steel. The top layer of stainless steel oxidizes to keep corrosion and rust at bay. The passivity properties of stainless steel also require fast polishing speeds. Expert metal polishing operators have processes in place to move quickly from step to step-or from grit to grit-without overworking the metal. ![]() This means polishing has to be fast and precise in order to complete the job before the metal’s condition changes and the abrasive agent no longer becomes appropriate. Stainless steel develops an increased hardness the longer stress is applied to the surface-this is known as work hardening. This challenge is due in large part to two of the predominant characteristics of the metal: Stainless steel is an ideal metal for a broad range of products and components, but it can be a difficult material to polish. Stainless Steel Characteristics and Properties to Consider 8 finish-one of the highest finishes that provides a mirror-like smoothness-requires abrasive alumina powder. Operators can use abrasives ranging in grit strength from 50-3,000 to gradually increase the smoothness of the finish without damaging the product. The requested finishing standard impacts the number of stages involved in the polishing process. Many of these stages involve using mechanical abrasive media-such as Alumina, Zirconia and Ceramics in the process of surface conditioning. The stainless steel polishing process contains between three and seven distinct stages to reach an ideal finish. Improving the service life of stainless steel components and surfaces.Reducing contamination risks by eliminating cracks or crevices where bacteria and other harmful contaminants might gather.Lowering the risk of corrosion from oxidation.It also has several functional benefits, including: Once metal components have been machined, polishing is a critical finishing step for a variety of parts and components to improve the aesthetic appearance of the finished product. As both a fabricator and distributor, our team can convert raw materials into manufactured pieces, finish them, and deliver the order to your warehouse or distribution center.įor more details about the high quality stainless steel polishing services contact us directly or request a quote. In addition to polishing, we offer end-to-end solutions for our clients. AAA Metals specializes in polishing a variety of stainless steel pieces, such as: Stainless steel can be more challenging to polish than some other metals, but experienced metal polishers can achieve smooth finishes without blemishes or damage. Polishing stainless steel is highly beneficial, as it noticeably improves its resistance to damage caused by corrosion, environmental factors, wear, and impacts. Metal polishing smooths the surfaces of fabricated metal pieces such as sheets, angles, and pipes, often providing the final finish before parts or materials go to their end use. ![]()
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