Custom Sheet Metal: Bar & Shapes Stainless Steel Finishes

Stainless Steel

  • Bar: from 1/4 inch to 10 inches wide and has a thickness of 1/8 inch to 8 inches. Flats that are formed using hot or cold rolling, forging, cold drawing or extrusion. 
  • Shapes: from 1/4 inch to 10 inches wide and has a thickness of 1/8 inch to 8 inches and a diameter or size of 0.125 inch or greater. Rounds, squares, octagons, hexagons and other shapes that are formed using hot or cold rolling, forging, cold drawing or extrusion

Finishes:

Hot Rolled, Forged, Pressed or Extruded

Hot Rolled, Forged, Pressed or Extruded

Cold Drawn or Rolled

Cold Drawn or Rolled

Hot Or Cold Drawn, Annealed And Pickled

Hot Or Cold Drawn, Annealed And Pickled

Polished Bar or Shapes

Polished Bar or Shapes

Ground or Centerless Ground Finish

Ground or Centerless Ground Finish

  • Hot Rolled, Forged, Pressed or Extruded products have a non-uniform dark appearance from hot processing. The dark coloration is associated with the surface oxide scale. This is an interim finish that is sometimes purchased when machining or other forming or finishing operations are planned.
  • Cold Drawn or Rolled products have a relatively uniform dull silver appearance although forming marks may be visible. This is often an interim finish when further machining, drilling or finishing is planned. For applications like shafts, the cold drawn finish is typically peeled before use.
  • Hot Or Cold Drawn, Annealed & Pickled products have been formed, heat-treated (annealed) to obtain a uniform microstructure and desirable mechanical properties, and then pickled to remove the scale that forms during heat-treating. The resulting finish is a uniform dull, silver gray. Pickling restores corrosion resistance and makes the bar suitable for applications where corrosion resistance is required. Examples of a round bar, hexagonal bar, square bar and three extruded shapes are shown.
  • Polished Bar or Shapes have been formed, annealed and pickled prior to polishing. The finish is characterized by long scratch lines from mechanical polishing. There may be machining prior to polishing to achieve desired dimensional tolerances. The polishing is done with polishing belts, which follow the contour of the shape or bar. It does not change the dimensions of the bar or shape. In comparison to grinding, it can produce a smoother finish but grinding produces tighter tolerances.
  • Ground or Centerless Ground Finish is similar in appearance to a polished finish. Circumferential scratch lines from grinding are visible. The finish can vary from coarse to smooth depending on the grinding stone. This finishing technique produces tight tolerances and can correct dimensional problems.
Photos and information sourced from: SSINA: Specialty Steel Industry of North America.  Visit their site for additional information on this product.
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