Original Basic Surface Treatment for Stainless Steel Coil
Stainless Steel Coil BA Finish
Stainless Steel Coil 2B Finish
Brushed Hairline Stainless Steel Coil
List of Basic Surface Treatment for Sanmei Metal's Stainless Steel Coil
| Surface | Appearance | Processing Method | Main Applications | |
| 1 | No.1 | Silver-white, dull | After hot rolling, heat treatment, and pickling, or other equivalent treatments. The surface is obtained through heat treatment and pickling after hot rolling. Typically used for cold-rolled materials, industrial tanks, and chemical equipment. | Used where surface gloss is not required (AISI standard) |
| 2 | No.2D | Light gray, matte finish (passivation process) | Cold rolling followed by heat treatment, pickling, and a final light cold rolling using dull finishing rolls. This surface is obtained after cold rolling, heat treatment, and pickling. Used for automotive parts, construction materials, and pipes. | General materials, construction materials (JIS standard). |
| 3 | No.2B | Smoother and slightly more glossy than No.2D. | Light cold rolling of No.2D material to achieve a suitable gloss. No.2D product after skin pass rolling, with better gloss and flatness than No.2D. After surface treatment to improve mechanical properties, it can meet almost all purposes. | General materials, construction materials (most commercial products are of this type, JIS standard). |
| 4 | BA | Close to mirror gloss | Bright annealing followed by light cold rolling after cold rolling. High surface gloss and reflectivity, similar to a mirror finish. Used for household appliances, mirrors, kitchen equipment, and decorative materials. | Automotive parts, household appliances, kitchenware, decorative items (JIS standard). |
| 5 | No.3 | Glossy, coarse-grained finish | Grinding No.2D or No.2B material with 100~120 grit abrasive belts. The resulting product has good gloss and discontinuous coarse grain, used for interior and exterior architectural materials, electrical products, and kitchen equipment. | Construction materials, kitchenware (JIS standard). |
| 6 | No.4 | Glossy, fine-grained finish | Grinding No.2D or No.2B material with 150~180 grit abrasive belts. The resulting product has good gloss and discontinuous fine grain, used for bathtubs, interior and exterior architectural materials, electrical products, kitchen equipment, and food equipment. | Construction materials, kitchenware, vehicles, medical instruments, food equipment (JIS standard). |
| 7 | #240 | Fine grinding finish | Grinding No.2D or No.2B material with 240 grit abrasive belts, used for kitchenware. | Kitchenware (JIS standard). |
| 8 | #320 | Finer than #240 finish | Grinding No.2D or No.2B material with 320 grit abrasive belts, used for bathtubs, interior and exterior architectural materials, electrical products, kitchen equipment, and food equipment. | Kitchenware (JIS standard). |
| 9 | #400 | Gloss similar to BA | Grinding No.2B material with 400 grit abrasive belts, used for building materials and kitchenware. | Construction materials, kitchenware (JIS standard). |
| 10 | HL (Hairline) | Long continuous grain | Using appropriate grit (generally 150-240) abrasive belts to produce a continuous grinding pattern, mainly used for architectural decoration, elevators, and door panels. | Most common in architectural materials (JIS standard). |
| 11 | No.6 | Less reflective than No.4, dull (leather-like texture) | Grinding No.4 material with tampico brush. | Construction materials, decorative use (AISI standard). |
| 12 | No.7 | High reflectivity, quasi-mirror finish (without grinding patterns) | Grinding with a rotating polish using 600 grit. | Construction materials, decorative use (AISI standard). |
| 13 | No.8 | Gradual fine grinding, followed by mirror polishing. | Construction materials, decorative use, mirrors (AISI standard). | |
| 14 | 2BK | Mirror-like gloss with smooth surface | Cold rolling followed by bright annealing and light skin pass. This process creates a smooth and reflective surface, often used as a base for further polishing or coating. | Primarily used for high-end decorative finishes like 8K mirror polish, color coating, and other surface treatments requiring high reflectivity and smoothness. |
| 15 | 2BB | Matte finish with low reflectivity | Cold rolling followed by a mild skin pass that provides a uniform matte surface. This finish is typically less reflective than 2BK and is suitable for applications where a dull surface is preferred. | Used for embossing, stamping, tube making, and precision rolling. Its matte surface makes it suitable for applications where reflectivity is not required, but formability and processing are important. |
| 16 | 2BQ | Matte finish similar to 2BB but with slightly better formability | Cold rolling followed by a mild skin pass. The process is optimized for better formability, making it more suitable for applications that involve light stamping or tube making. | Ideal for light stamping and tube making, especially when better processing performance is needed compared to standard 2B finishes. However, it is less suitable for applications requiring further surface treatment like polishing or coating. |
Colored Stainless Steel Coil: The Solution to Inconsistent Colors in Decorative Stainless Steel Sheets!
Ensure uniform color across the entire coil.
Ideal for large-scale production, offering economic benefits.
Colored Stainless Steel Coil- 8k Mirror Polished
Colored Stainless Steel Coil- PVD Coating
Customize Pattern for Your Stainless Steel Coil
Grades of Sanmei Metal's Colored Stainless Steel Coil
201 J1 J2 J3 J4 Stainless Steel Coil
Characteristics: 201 stainless steel contains higher manganese and lower nickel, offering good corrosion resistance and strength, but its corrosion resistance is not as strong as that of 304 and 316. It is relatively inexpensive.
Common Applications: Often used in kitchen equipment, tableware, furniture, and some architectural decorative materials.
304/304L Stainless Steel Coil
304 is a standard stainless steel with higher carbon content, while 304L is a low-carbon version that offers better corrosion resistance and weldability.
Applications:
- 304 Stainless Steel: Widely used in food processing, chemical handling, and construction.
- 304L Stainless Steel: Typically used in environments that require welding, such as chemical equipment and oil pipelines.
316/316L Stainless Steel Coil
- 316 stainless steel offers excellent corrosion resistance and high-temperature strength, commonly used in marine and chemical environments.
- 316L stainless steel is a low-carbon version of 316, providing better weldability and resistance to intergranular corrosion.
Application:
316 Stainless Steel: Marine environments, chemical equipment, food processing.
430 Stainless Steel Coil
Characteristics: 430 stainless steel is a ferritic stainless steel with high chromium content, offering good corrosion resistance but lower strength and toughness, and it does not have good weldability.
Common Applications: Commonly used in automotive exhaust systems, appliance exteriors, kitchen utensils, and decorative purposes.
Specification of Sanmei's Colored Stainless Steel Coil
| Width (mm) | Weight (MT) | Thickness (mm) | ||||
| 1000, 1219, 1240, 1500 or Customized | 3-10 | 0.15-3.0 | ||||
Plenty of Decorative Finishes for Your Stainless Steel Sheet
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Precision Slitting
Custom Length Cutting
Shearing
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Surface Polishing
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Stainless Steel is Everywhere
Stianless Steel is an indispensable material across a wide spectrum of industries, from food processing and medical equipment to household goods, construction, and industrial applications.
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