METAL POLISHING
Polishing requires a steady hand, keen eye, and the patient persistence of a true craftsmen. Triangle Metals has established an entire department dedicated to finishing. Our personnel excel in the finishing processes for smoothing and shining a work piece's surface.
By rubbing the surface of a material with a fine abrasive, usually contained in a cloth or other soft lap, a high shine finish can be achieved. This happens because the process results in microscopic flow of the surface material without actual removal of the metal.
Utilizing our trusted polishing techniques, we are able to produce smooth, bright, high luster finishes. We offer the best polishing services for your products, leaving you with a mirror finish on the parts that require it.
Available Finishes with Description
| Finish | Ra Number µ inch | US Grit Reference | Description |
| Discolor | Unpolished | None | Surface and welds are free of discoloration from welds and handling. |
| Grind | Unpolished | None | Finish is not flush and will contain irregularities on the remaining weld. When compared to all the abrasive finishing methods, this process results in the least amount of weld material removed |
| Blend | 80 | 100 | Welds are blended and smooth with no irregularities. |
| 2B | 80 | 100 | This is the most common finish produced and called for on sheet material. It is brighter than 2D and is semi-reflective. It is commonly used for most deep drawing operations, and is more easily polished to the final finished required than is a 2D finish. |
| No. 3 | 70 | 100 | This is a ground unidirectional finish obtained with 80 - 100 grit abrasive. It is a good intermediate or starting surface finish for use in such instances where the surface will require further polishing operations to a finer finish after subsequent fabrication or forming. |
| Bead Blast | 32 | 150 | This is a sanitary ground non-directional finish obtained by bombarding the surface with 150 grit abrasive sand like material that is projected by compressed air. The result is non-reflective satin finish. |
| No. 4 | 32 | 150 | This is a high grade sanitary ground unidirectional finish obtained with 150 grit abrasives. It is not highly reflective, but is a good general purpose finish on components which will suffer from fairly rough handling in service |
| No. 8 | 10 | NA | This is a buffed finish having a high degree of reflection. Sometimes called a mirror finish, It is produced by progressively using finer and finer abrasives and finishing with buffing compounds. |
