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How Stainless Steel Surface Finishes 2B, No.1, BA and No.4 Differ
Release Time :
2026-09-11 13:57
When buyers compare stainless steel sheet or plate, the grade is only part of the specification. The surface finish can also affect appearance, formability, cleaning, downstream polishing, and final use.
Finishes such as 2B, No.1, BA, and No.4 are not simply cosmetic labels. You can think of them as different surface conditions created by different processing routes, each suited to a different job.
What Is a 2B Stainless Steel Finish?
2B is one of the most common cold-rolled stainless steel finishes.
It is produced after cold rolling, annealing, pickling, and a light finishing pass. The result is a smooth, uniform, low-reflective surface.
2B is widely used for fabrication, food equipment, tanks, appliances, and general industrial applications because it provides a clean surface without the higher cost of decorative polishing.
How Does No.1 Finish Differ?
No.1 is a hot-rolled, heat-treated, and pickled finish.
Compared with 2B, it has a rougher, more matte appearance and is generally used where surface appearance is less important than function.
Typical applications include thicker stainless steel plate, chemical equipment, pressure vessels, structural components, and heavy fabrication.
For buyers, No.1 is often the practical choice when the material will be cut, welded, machined, or further processed.
What Are BA and No.4 Finishes?
BA, or Bright Annealed, has a smoother and more reflective appearance than 2B.
It is produced through controlled annealing that minimizes surface oxidation. BA is commonly chosen for applications where a bright, clean appearance matters.
No.4 is a mechanically polished finish with a visible directional grain. It is widely used for architectural panels, kitchen equipment, elevators, and decorative fabrication.
The important difference is that BA gains its brightness mainly from processing conditions, while No.4 gets its appearance through abrasive polishing.
What Should Buyers Specify Before Ordering?
Buyers should state the stainless steel grade, thickness, dimensions, required finish, protective film, polishing direction, and final application.
At Xinzhonglian Steel, we supply stainless steel sheet and plate for distributors, fabricators, contractors, and industrial buyers, with surface finish requirements reviewed according to the intended use. And we have steel coil, steel plate, steel pipe, steel round bar, steel profiles, wire rod, rebar.
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