Surface No.4
No.4 Brushed Stainless Steel Finish
No.4 is a directional satin finish produced with abrasive belts; it is widely used for food equipment, elevators, wall panels and architectural trim.
Appearance
- Uniform short directional grain with controlled satin reflectivity.
Production route
- Start from 2B or BA sheet
- Abrasive belt polishing
- Cleaning
- PVC or laser protective film
Typical uses
- Commercial kitchens
- Elevator interiors
- Wall cladding
- Equipment covers
Purchase-order checks
- Abrasive grit or reference sample
- Grain direction
- Gloss range if measured
- Weld blend expectation
- Film and surface side
Protection and acceptance
- State the critical side, grain direction and protective film
- Approve a sample covering grit, gloss and color tone
- Inspect grain continuity, cross scratches, chatter and weld blending under directional light
Common defects to control
- Uneven grain or belt chatter
- Cross scratches
- Batch-to-batch gloss and tone variation
Example purchase description
- 304 stainless sheet, 1.2 x 1219 x 2438 mm, No.4 one side to approved sample, grain along 2438 mm, laser film on finished face.
Technical content updated: 2026-07-29
Organizational author: Tsingshan (Shandong) Iron & Steel Co., Ltd..Review method, status and limitations.
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