2b Hoàn thiện bảng Ss

2b Hoàn thiện bảng Ss

2B finish SS sheet is the standard cold-rolled stainless steel surface widely used in industrial and commercial applications. Its production process includes cán nguội, ủ, dưa chua, and skin pass rolling, which creates a smooth matte surface with excellent flatness and good processing performance.

Sự miêu tả

2B finish SS sheet refers to stainless steel sheet with a smooth, matte cold-rolled surface produced through a specific annealing and skin-pass process. Among all stainless steel finishes, 2B is the most common standard surface for industrial stainless steel sheets, especially for grades such as 201, 304, 316, Và 430.

The 2B surface is widely used because it offers a clean appearance, stable flatness, and good performance for further fabrication such as bending, hàn, đánh bóng, and coating.

What Is 2B Finish on Stainless Steel Sheet?

2B finish is a cold-rolled surface treatment defined by ASTM and EN standards. It is created through a combination of:

Cán nguội
Xử lý nhiệt (ủ)
dưa chua
Lăn qua da

This process gives the stainless steel sheet a uniform gray-white appearance with moderate reflectivity, smoother than No.1 hot rolled finish but less reflective than BA finish.

How 2B Finish Is Produced

The production of 2B finish stainless steel sheet follows several key steps.

1. Cán nguội

The stainless steel coil is first reduced to the required thickness by cold rolling. This process improves dimensional accuracy and creates a relatively smooth surface.

Cold rolling also increases material hardness, so the sheet must be softened before final use.

2. Ủ

Sau khi cán nguội, the sheet passes through an annealing furnace. The purpose is to restore ductility and remove internal stress caused by rolling.

The annealing process usually occurs at temperatures above:

Lớp thép không gỉ	Annealing Temperature
304	1040–1150°C
316	1040–1120°C
430	760–815°C

During annealing, the microstructure becomes uniform, improving formability.

3. dưa chua

After annealing, oxide scale forms on the surface. The sheet is then treated by acid pickling to remove oxidation layers.

Common pickling solutions include:

Nitric acid
Hydrofluoric acid

Pickling creates a clean metallic surface and removes heat tint.

4. Lăn da

The final step is light cold rolling, also called skin pass or temper rolling.

Quá trình này:

Improves surface smoothness
Enhances flatness
Reduces waviness
Produces the final 2B texture

This is the core reason why 2B finish has a smoother appearance than ordinary annealed sheet.

Surface Characteristics of 2B Finish

Tài sản	Sự miêu tả
Bề ngoài	Mịn màng
Độ phản xạ	Thấp đến trung bình
Phương pháp sản xuất	Cán nguội + ủ + ngâm chua + skin pass
Độ nhám bề mặt	Typically Ra 0.1–0.5 µm
Độ phẳng	Xuất sắc
Further Processing	Easy

2B finish is often chosen as the base material for further polishing, mirror processing, or PVD color coating.

Phạm vi độ dày phổ biến

2B finish stainless steel sheet is typically available in thin and medium thicknesses.

Phạm vi độ dày	Sử dụng chung
0.3–1,0mm	Tấm trang trí
1.0–3,0mm	Chế tạo
3.0–6.0 mm	Thiết bị công nghiệp

Most 2B sheets are produced by cold rolling, so they are usually found in thicknesses below 6 mm.

Ứng dụng phổ biến

Because of its smooth and practical surface, 2B finish stainless steel sheet is widely used in:

Thiết bị công nghiệp

Bể chứa hóa chất
Tấm máy móc
Storage containers
Water treatment equipment

Sự thi công

Tấm tường nội thất
Tấm thang máy
Architectural cladding
Ceiling systems

Công nghiệp thực phẩm

Thiết bị nhà bếp
Food processing tables
Refrigeration systems
Dairy equipment

2B Finish vs Other Stainless Steel Finishes

Hoàn thành	Bề mặt	Phương pháp sản xuất	Sử dụng chính
2B	Mịn màng	Cán nguội	sử dụng chung
cử nhân	Bright reflective	ủ sáng	trang trí
Số 4	chải	Mechanical polishing	Thiết bị gia dụng
HL	đường chân tóc	Continuous polishing	kiến trúc