Comprehensive analysis of 304BA steel sheet

1、 Definition and Characteristics

304BA steel sheet is an austenitic stainless steel plate that has undergone bright annealing after cold rolling. Its surface presents a high degree of smoothness (such as mirror or bright surface), and it has corrosion resistance, formability, and aesthetics. It is widely used in the field of precision machining. Its core features include:

Surface quality: Ra roughness ≤ 0.5 μ m (precision cold rolling), can be coated or brushed to enhance protection.

Corrosion resistance: With a chromium content of 17-19% and a nickel content of 8-10%, it can withstand corrosive media such as nitric acid and organic acids.

2、 Production process and parameters

Manufacturing process

Cold rolling processing: Using a 20 roll rolling mill to roll to the target thickness (such as 0.5-8.0mm), combined with annealing and acid washing to remove the oxide layer 13.

Bright annealing: Annealing is carried out under the protection of hydrogen or nitrogen to prevent oxidation and maintain surface brightness of 37.

Key Performance

Range of indicator parameters

Tensile strength (MPa) 520-700

Hardness (HV) 150-200

Elongation rate (%) 40% -50%

Surface roughness (Ra) ≤ 0.5 μ m (precision mirror)

3、 Core application areas

Precision stamping parts

Suitable for stamping parts such as insulated cups and electronic component casings that require high smoothness and complex shapes, requiring high-precision molds (gap ≤ 5% plate thickness).

High end decoration

Used for elevator decorative panels and home appliance panels (such as refrigerator liners), the surface can be customized with brushed, laminated, or mirror effects.

Chemical and Food Equipment

Produce corrosion-resistant components such as storage tanks and pipelines to adapt to acidic or alkaline working environments.

4、 Market supply and selection

Thickness range: 0.05-8.0mm (conventional), supports ultra-thin (0.03mm) or ultra wide (2000mm) customization.

Surface treatment: 2B (cold rolling), BA (bright annealing), HL (drawing), etc.

5、 Precautions

Surface maintenance: Avoid scratching with hard objects, use neutral detergent during cleaning to maintain brightness.

Processing adaptation: Degreasing treatment is required before stamping to ensure that the mold surface is free of impurities and prevent scratches.