No. 1 Finish Stainless Steel Manufacturer in China
No. 1 finish is a non-uniform, moderately rough, and dull finish that involves rolling the heated stainless steel, annealing, pickling, and passivating. Annealing is a heat treatment that ensures that the SS sheet will match the mechanical property requirements. It also gives a uniform microstructure.
Then, the resulting surface will have an uneven and dark appearance. And the surface chromium has also been lost during the previous steps. Their expected corrosion resistance level will also be reached after descaling or pickling. Stainless steel with a no. 1 finish has shiny spots and the surface blemishes were removed through grinding.
Grade Options
The no. 1 finish SS sheets are available in 200, 300, and 400 series such as:
- 201
- 202
- 304/304L/304H
- 309S
- 310/310S
- 316/316L/316Ti
- 317L
- 321/321H
- 347/347H
- 409
- 410
- 430
- And more
Physical and Mechanical Properties
Below is the table that shows the properties of different grades of no. 1 finish SS sheets.
| SS | 200 | 202 | 301 | 302 | 303 | 304 | 304L | 309 | 309s | 310 | 310s | 314 | 316 | 316L | 317 | 321 | 347 |
| Yield
Strength |
55 | 55 | 40 | 37 | 35 | 35 | 30 | 40 | 40 | 40 | 40 | 50 | 35 | 30 | 40 | 35 | 35 |
| Tensile
Strength |
105 | 105 | 110 | 90 | 90 | 85 | 60 | 90 | 90 | 95 | 95 | 100 | 85 | 78 | 90 | 87 | 92 |
| Elongation
in 2′ |
55 | 55 | 60 | 55 | 50 | 55 | 55 | 45 | 45 | 45 | 45 | 45 | 55 | 55 | 50 | 55 | 50 |
| Brinell | 185 | 185 | 165 | 155 | 160 | 150 | 140 | 165 | 165 | 170 | 170 | 170 | 150 | 145 | 160 | 150 | 160 |
| Rockwell | 90 | 90 | 85 | 82 | 84 | 80 | 76 | 85 | 85 | 87 | 87 | 87 | 80 | 76 | 85 | 80 | 84 |
The no. 1 finish SS sheets are commonly used for non-decorative purposes, high-temperature applications, and pressure applications. Examples of their applications include:
- Unexposed support systems
- Oil burner parts
- Structural applications
- Heat exchangers
- Air heaters
- Furnace conveyors
- Food processing equipment
- Oil refinery equipment
- Architectural trim
- Nuclear reactor components
- Valve components
- Structural components
- Incinerators
- Recuperators
No. 1 finish SS sheets can be used in various industries including:
-
- Railway & Transport
- Automotive & Mechanical
- Chemical & Petrochemical Industries
- Architecture, Building & Construction
- Energy & Power
- Pharmaceutical & Medical
- Oil & Gas Industries
- Plumbing & Overhead Water Tanks
- Kitchenware & Food Processing Industries
- Beverage, Dairy, and Food Industries
- Machinery & Hardware
- Electronics
- Fabrication Industry
