Cold Rolled SUS 304 304L BA Surface Stainless Steel Coil

Product Description:

WinscoMetal Natural Color Cold Rolled SUS304 / SUS304L stainless steel coil with BA (Bright Annealed) bright surface. Produced by cold rolling and bright annealing treatment, the coil presents natural bright metallic finish without extra coloring. SUS304L low carbon version delivers superior intergranular corrosion resistance after welding. It has uniform bright surface, stable dimension and excellent formability, widely used for sanitary, food, medical and precision fabrication projects. Custom thickness, width and slitting service available.

Product Advantage:

• BA Bright Annealed Surface: Smooth bright natural metallic finish, clean surface, easy for further polishing, stamping or coating.
• 304 & 304L Dual Grades: SUS304 for general use; SUS304L low carbon grade minimizes carbide precipitation after welding, better anti-corrosion for welded parts.
• Great Corrosion Resistance: Good rust resistance under atmospheric, mild acid and humid environments, suitable for sanitary applications.
• High Strength & Formability: Cold rolled structure improves tensile strength, performs well in deep drawing, bending and complex forming.
• Stable Natural Color: Original stainless steel metallic tone, no fading or discoloration, consistent aesthetic for visible components.
• Non-magnetic Feature: Low magnetism, fit for electronic and electrical related applications.

Specifications:

Application:

• Food & Sanitary Industry: Food production machinery, tableware, sanitary components requiring high hygiene standards.
• Medical & Chemical Field: Medical equipment, chemical processing equipment with corrosion resistant requirements.
• Construction & Transportation: Building exterior cladding, automotive components, semi-trailer tank body, ship auxiliary parts.
• Aerospace & Electronics: Aerospace accessories, electrical and electronic parts due to low magnetic property.
• General Manufacturing: Precision stamped parts, deep drawn components and general machinery fabrication.

FAQ

• Q: What is BA surface finish on stainless steel coil?
  A: BA (Bright Annealed) is a bright, smooth, mirror-like metallic surface formed by bright annealing after cold rolling. It features natural color, high cleanliness, no oxidation layer, ideal for visible and high-hygiene components.
• Q: What’s the difference between 304 and 304L BA stainless steel coil?
  A: 304L is low-carbon grade (≤0.03% carbon), effectively preventing intergranular corrosion after welding. 304 offers higher mechanical strength for non-welded parts. Both provide excellent BA bright surface and corrosion resistance.
• Q: Is 304/304L BA stainless steel coil magnetic?
  A: In annealed status, it is almost non-magnetic. Slight magnetism may occur after cold working like bending and stamping, suitable for electronic and electrical applications.
• Q: What are the advantages of natural color BA finish?
  A: Natural original metallic luster without color fading, ultra-smooth surface, easy cleaning and sanitization, perfect for food-grade and medical equipment.
• Q: Can you customize thickness and width for BA stainless steel coil?
  A: Yes. We support custom thickness 0.15mm–10.0mm and custom width 1000–1500mm, as well as professional slitting service.
• Q: What processing methods suit BA surface coil?
  A: It supports deep drawing, stamping, bending, laser cutting and welding. The bright BA surface remains stable after fine processing.
• Q: What industry scenarios are BA stainless steel coils mainly used for?
  A: Widely used in food machinery, tableware, medical devices, electronic parts, architectural decoration and precision industrial components.
• Q: Do you provide MTC certificates for stainless steel coils?
  A: Yes. All coils comply with ASTM, JIS and EN standards. Mill test certificates can be provided before delivery.