Even though mirror stainless steel is labeled as "mirror," it actually comes in various grades. These grades refer to the degree of surface roughness of the stainless steel, each representing a distinct surface effect. For instance, 8K and 12K mirror stainless steel may look similar at first glance, but they offer different surface finishes. However, this classification based on "K" values is somewhat broad. Without direct comparison, it can be challenging to notice the subtle differences in their surface textures!
To help clarify these distinctions, we’ve compiled a detailed guide that breaks down the various grades of mirror stainless steel:
- **Mirror Stainless Steel Grade 14**: Surface Finish Ra 0.012~0.03µm (14K) – This grade offers an ultra-fine polish with a nearly flawless surface appearance.
- **Grade 13**: Surface Finish Ra 0.015~0.02µm (12K) – Features a super-fine polish with excellent visual clarity.
- **Grade 12**: Surface Finish Ra 0.02~0.16µm (10K) – Offers fine polishing with a smooth and reflective surface.
- **Grade 11**: Surface Finish Ra 0.1~0.2µm (8K) – Provides a polished surface that’s still reflective but less so than higher grades.
- **Grade 10**: Surface Finish Ra 0.2~0.3µm – Often referred to as BA stainless steel, it maintains some brightness but not a full mirror finish.
- **Grade 9**: Surface Finish Ra 0.4µm – Known as a 4K finish, it has minimal shine and resembles a 2B surface.
- **Grade 8**: Surface Finish Ra 0.8µm – Shows slight processing marks but lacks mirror-like qualities.
- **Grade 7**: Surface Finish Ra 1.6µm – Visible processing marks, no mirror effect.
- **Grade 6**: Surface Finish Ra 3.2µm – Rougher surface with noticeable processing traces.
- **Grade 5**: Surface Finish Ra 6.3µm – Even rougher with more pronounced processing marks.
- **Grade 4**: Surface Finish Ra 12.5µm – Rough surface with clearly visible processing lines.
- **Grade 3**: Surface Finish Ra 25µm – Very rough surface with obvious processing marks.
- **Grade 2**: Surface Finish Ra 50µm – Extremely rough with significant processing traces.
- **Grade 1**: Surface Finish Ra 100µm – Roughst of all grades with very visible processing marks.
As you move up in grade, the surface becomes smoother, shinier, and more polished. Understanding these grades allows for easier identification and comparison of stainless steel surfaces. Each grade serves specific purposes, from highly polished mirrors to industrial applications where surface finish isn’t critical.
It’s important to note that raw stainless steel from major manufacturers starts in its unprocessed state, and the final surface effect depends heavily on post-production polishing techniques. Polishing can involve tapes, plates, or even small finished pieces, depending on the desired outcome. Beyond polishing, there are other surface treatments like embossing, brushing, and matte finishes, which cater to diverse aesthetic and functional needs.
By understanding these nuances, you’ll be better equipped to select the right grade of stainless steel for your project, ensuring both functionality and visual appeal!
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