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Stainless Steel Seamless Pipe Polishing

Penn Stainless offers bar and structural polishing as part of our full line of stainless steel processing services.


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Stainless Steel Bar and Structural Polishing Overview

stainless bar and structural polishing

Bar and Structural Polishing Requirements:

  • Products Polished: all tubular products, with OD & ID polishing available: round, square, hex & flat bar, angles, beams and other shapes
  • Standard Finishes Offered: #4 polish – #6 polish – #8 mirror or per customer specification or sample
  • * Tolerance may vary depending on grade or thickness.

Purchasing Considerations:

  • Is there a specific RA requirement?
  • Is a pit-free surface required?
  • Does the finish need to be matched with an existing surface finish?

Specifications Information

Unpolished or Rolled Finishes

No 1 A rough, dull surface, which results from hot rolling to the specified thickness, followed by annealing and descaling. More Information
No 2D A dull finish which results from cold rolling followed by annealing and descaling, and may perhaps gets a final light roll pass through unpolished rolls. A 2D finish is used where appearance is of no concern. More Information
No 2B A bright, cold-rolled finish resulting in the same manner as No.2D finish, except that the annealed and descaled sheet received a final light roll pass through polished rolls. This is the general-purpose cold-rolled finish that can be used as is, or a preliminary step to polishing. More Information
(BA) Bright Anneal The bright annealed mill surface is obtained by annealing the material under an atmosphere so that scale is not produced on the surface. More Information


Polished Finishes

No 3

An intermediate polished surface obtained by finishing with a 100-grit abrasive. Generally used where a semi finished polished surface is required. A No. 3 finish usually receives additional polishing during fabrication. More Information

No 4

A polished surface obtained by finishing with a 120-150 mesh abrasive, following initial grinding with coarser abrasives. This is a general purpose bright finish with a visible “grain” which prevents mirror reflection. More Information

No 6

A dull satin finish having lower reflectivity than No 4 finish. It is produced by Tampico brushing the No. 4 finish in a medium of abrasive and oil. It is used for architectural applications and ornamentation where a high luster is undesirable, and to contrast with brighter finishes. More Information

No 7

A highly reflective finish that is obtained by buffing finely ground surfaces but not to the extent of completely removing the “grit” lines. It is used chiefly for architectural and ornamental purposes. More Information

No 8

The most reflective surface, which is obtained by polishing with successively finer abrasives and buffing extensively until all grit lines from preliminary grinding operations are removed. It is used for applications such as mirrors and reflectors. More Information

Call us at 1-800-222-6144 for more information

Stainless Steel Seamless Pipe Polishing