NO.4 Stainless Steel Sheet

It is characterized by short, parallel polishing lines and is the easiest of the stainless finishes to maintain. Depending on the requirements of the application, the final finish can be anywhere between 120 and 320 grit. (Higher grit numbers produce finer polishing lines and more reflective finishes.) The surface roughness is typically Ra 25 micro-inches or less.

NO. 4 finish gives low gloss and best apparent flatness of panels.

No. 4 finish simply as, “General purpose polished finish, one or both sides”. It also states, “No. 4 – A linearly textured finish that may be produced by either mechanical polishing or rolling. Average surface roughness (Ra) may generally be up to 25 micro-inches (0.64 micrometres).

No. 4 Finish is the most popular for appliances, the food and beverage industry, elevators, escalators, hospitals, and any work area where there is food contact.