While each finish had a distinct appearance, it also had an effect on the steel's ability to resist corrosion and maintain hygienic conditions. Smoother steels resist corrosion from chlorides and other sources well and are simpler to clean. Although rougher steels are cheaper, they are harder to clean and won't hold up as well to exposure to causes of corrosion. This is crucial if you're thinking about using stainless steel in a kitchen or a hospital setting. Though many will use a higher finish for accents or for appliances, food-grade steels typically start with a minimum finish of 4 at the lowest.
Various Uses of Stainless Steel Sheet Depending on Finish Number
- Number 1 Finish: Air heaters, boiler baffles, carburizing boxes, crystallizing pans, firebox sheets, furnace arch supports, conveyors, dampers, linings, stacks, gas turbine parts, heat exchanger tubing supports, incinerators, industrial oven liners, kiln liners, oil burner parts, recuperators, refineries, and tube hangers.
- Number 2B Finish: Bakeware, flatware, laundry and dry cleaning, paper mill equipment, pharmaceutical equipment, plumbing fixtures, sewage treatment, small tanks, solar collector panels, vacuum drum dryers, waste fuel pool liners, and wheel covers are some examples of the items that fall under this category.
- Number 2BA Finish: Appliance trim, appliances, architectural elements, auto trim, builder's hardware, chute liners, cookware, fishing gear, flatware, food processing equipment, general hardware, highway truck trailers, public transportation vehicles, radiant heaters, range hoods, scientific equipment, surgical instruments, and textile finishing equipment.
- Number 2D Finish: petrochemical equipment, railcar parts, roof drainage systems, stone anchors, builder's hardware, chemical equipment, chemical trays and pans, electric range parts, furnace components, and petrochemical equipment.
- Number 3 Finish: Brewing equipment, kitchenware, food processing equipment, and scientific instruments.
- Number 4 Finish: appliances, architectural wall panels, boat fittings, bus shelters, clean rooms, column covers, dairy equipment, elevator doors and interiors, escalator trim, furniture, highway tank trailers, hospital surfaces, and equipment, instrument or control panels.
- Number 5 Finish: Used most frequently in coastal regions for architectural parts when a shiny or bright finish is inappropriate.
- Number 7 Finish: Uses in architecture and interior design include wall panels, trim, and column covers.
- Number 8 Finish: Wall panels, press plates, mirrors, ornamental trim, column coverings, reflectors, and clean rooms.
For more information, visit stainless steel colour finish sheets stockist for getting a detailed idea of stainless steel finished sheets.
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