BA Finish Stainless Steel Roll Forming Material Guide: Bright Annealed, Coil Sizes & Applications

BA Finish Stainless Steel Roll Forming Material

1. Overview of BA Finish Stainless Steel in Roll Forming

BA (Bright Annealed) finish stainless steel is a highly smooth and reflective surface finish produced by annealing stainless steel in a controlled, oxygen-free atmosphere. This process prevents oxidation and results in a bright, mirror-like surface.

In roll forming, BA finish stainless steel is widely used for decorative, architectural, and hygienic applications, where both appearance and corrosion resistance are important.

Compared to 2B finish, BA offers a more reflective and visually appealing surface.

2. Material Composition & Structure

BA finish refers to the surface finish, not the material grade.

It is commonly applied to:

• 201 stainless steel
• 304 stainless steel
• 316 stainless steel
• 430 stainless steel

Structure

• Stainless steel base material
• Bright annealed surface
• Smooth, reflective finish

3. Available Coil Specifications

Thickness Range

• 0.3mm – 4.0mm

Coil Width

• 600mm – 1500mm

Coil Weight

• 2 tons – 10 tons

Coil ID / OD

• ID: 508mm / 610mm
• OD: up to 1600mm

Tolerance

• High surface consistency
• Excellent flatness

4. Mechanical Properties

Mechanical properties depend on base grade:

• Yield Strength: 200 – 600 MPa
• Tensile Strength: 500 – 900 MPa
• Elongation: 20% – 60%
• Hardness: 150 – 300 HB

5. Surface Finish Details

BA Finish Characteristics

• Bright, reflective surface
• Smooth and uniform
• Higher reflectivity than 2B
• No visible grain

Production Process

1. Cold rolling
2. Annealing in oxygen-free furnace
3. Controlled cooling

Typical Roughness

• Ra ≈ 0.1–0.3 µm

6. Common Roll Forming Applications

• Decorative wall panels
• Architectural cladding
• Elevator panels
• Kitchen and food equipment
• Appliance panels
• Interior design elements

7. Advantages of BA Finish Stainless Steel

• Highly reflective appearance
• Smooth surface (easy to clean)
• Hygienic properties
• Excellent for decorative use
• Better corrosion resistance due to smooth surface

8. Disadvantages / Limitations

• More expensive than 2B
• Scratches and marks more visible
• Requires careful handling
• May require protective film
• Not a true mirror finish (less reflective than polished mirror)

9. Roll Forming Machine Considerations

Roll Tooling

• Polished chrome rollers essential
• Surface protection critical

Speed

• 8–25 m/min

Lubrication

• Light lubrication recommended

Cutting

• Clean, burr-free cutting required

Common Issues

• Surface scratching
• Handling damage
• Roller marks

10. Common Problems in Production

• Surface scratching during forming
• Fingerprints and handling marks
• Roll marks from tooling
• Protective film damage
• Uneven reflectivity

11. Pricing Guide

Typical global pricing (depends on base grade):

• Low: $1500–$2500 per ton (430 base)
• Medium: $3000–$4500 per ton (304 base)
• High: $4500–$7500+ per ton (316 base)

Factors affecting price:

• Base grade
• Surface quality
• Thickness
• Protective film

12. Comparison with Other Finishes

BA vs 2B Finish

• BA = more reflective
• 2B = more industrial

BA vs Mirror Finish

• BA = semi-reflective
• Mirror = highly reflective

BA vs No.4 Brushed

• BA = smooth
• No.4 = directional grain

13. Best Industries Using BA Finish Stainless Steel

• Architecture and design
• Food processing
• Appliance manufacturing
• Interior decoration
• Elevator and panel systems

14. How to Choose BA Finish Stainless Steel

Choose BA When:

• Aesthetic appearance is important
• Hygienic surfaces required
• Smooth reflective finish needed
• Interior or controlled environments

Avoid When:

• Heavy industrial use
• Surface damage risk is high
• Budget is limited

15. FAQ Section

What is BA finish stainless steel?

A bright annealed, reflective stainless steel finish.

Is BA finish better than 2B?

For appearance, yes.

Is BA a mirror finish?

No, but it is highly reflective.

Does BA scratch easily?

Yes, careful handling is required.

Can BA be used in food applications?

Yes, it is hygienic and smooth.

16. Machine Matcher Section

We supply roll forming machines for all material types including BA finish stainless steel.

• Custom-built machines to your profile
• New machines built to specification
• Global delivery available
• UK and USA technical support

Contact:
Machine Matcher
Sales & Technical Team

Quick Specs

Thickness
0.3–4.0mm

Yield Strength
200–600 MPa

Coil Width
600–1500mm

Coil ID
508 / 610mm