Polished Stainless Steel Flat Bar

Essentially polishing in metallurgy implies that the surface of the alloy, in this case, ss has been finished by using a combination of an abrasive along with a work wheel or a leather strop. Very often a Polished SS Flat Bar tends to have a flat, defect-free surface, as well as a smoother surface. A mirror effect is also a type of polished finishing. Referred to as no. 8 finish, a mirror polished ss flat bar is highly reflective while masking the after-effects of welding and hiding any surface damage that occurs during its production.

Polished Stainless Steel Flat Bar

Another refective finished component is the bright polished SS bar that has been achieved by bright buffing. Bright polishing is conducted with the help of a soft mop and a suitable polishing compound. Best suited for applications involving architecture and catering, bright polished SS square bar is essentially an enhancement of the mill surface, although this finish will not remove surface defects.

polished SS bars can often be used in either pharmaceutical, biomedical as well as the food and beverage industry. This is because polishing can be used to finish SS grades in order to make it sanitary. Although the kind of operation it is to be used for will depend on which alloy grade will be used to produce the Polished SS Round Bar. At Steel Tubes India, we keep various grades of brushed SS bar stock at our factory.


Polished Stainless Steel Flat Bar specification schedule

Polished Stainless Steel Flat Bar Available in Grades 304, 304L, 309, 310, 316, 321, 347
Thickness range of Mirror Polished SS Flat Bar 1/8” To 2”
Width range of Polished Steel Rod 3/8” To 8”
Tolerance of Polished SS Round Bar American Society for Testing and Materials, ASME

Industry Application of Polished Stainless Steel Round Bar

  • Packaging
  • Biotech
  • Vacuum
  • Mechanical
  • Fabrication
  • Chemical
  • Railing
  • Marine
  • Aerospace
  • Architectural
  • Pharmaceutical
  • Welding
  • Food Process
  • Retail

Available grades of Mirror Polished Stainless Steel Flat Bar

  • SS 304
  • SS 304H
  • SS 304L
  • SS 310 / 310S
  • SS 310H
  • SS 316 / 316L
  • SS 316Ti
  • SS 317
  • SS 317L
  • SS 347
  • SS 347H
  • SS 410
  • SS 446
  • SS 904L

Difference between brushed and mirror polished stainless steel flat bar

Brushed finish or as simply referred to as No. 4  finish performed on stainless steel flat bars can vary with different suppliers. In fact, the appearance of the bar can also vary batch to batch, even if they have been finished by the same supplier. This variation occurs due to the difference in its manufacturing condition. For instance, wearing of the abrasive belts used in these finishes could render different results. Which is why most buyers accept some level of variation while placing an order for stainless steel bars with No. 4 Brushed finish.

During its processing stainless steel bars are brushed, thereby creating a distinctive appearance with a muted lustre as well as a pattern of fine parallel lines. A combination of the aforementioned patterns offers a strong decorative appeal without the surface of these bars being too reflective. Essentially a number finish is ordered when too much reflectiveness is considered to be undesirable. For instance, having an overly reflective stainless steel bar on a building can be blinding when exposed to bright sunlight. A major drawback to no 4. Finish would be its reduced resistance to corrosion since the grooves of the finish tend to be susceptible to rust.

On the other end of the line is Mirror finish or what is referred to as No.8 finish.
Known to have a highly reflective surface, the mirror effect has been created by polishing the stainless steel flat bar. As the surface of these stainless steel bars undergoes a polishing process, the appearance has been enhanced while being of the same consistency. This is what makes cleaning easier. Moreover, mirror polishing also masks the after-effects of welding operations carried out on the bar and hides surface damage.

This finish is created by mechanically treating the surface of stainless steel flat bars with a series of progressively finer abrasives. Alternatively, simulation of the mechanical abrasion can be performed by a special rolling procedure, following which it is necessary to eliminate deep scratches because surface defects tend to be very noticeable on the finished product. Buffing the surface for 5-10 minutes these flat bars is the final process which creates a mirror-like, highly reflective finish. A benefit of performing No. 8 Mirror finishing on stainless steel flat bars is that it improves corrosion resistance. The polishing performed on these bars eliminates crevices where corrosive particles could get lodged.