bright finish stainless steel foil

Core Performance Advantages

Compared to ordinary cold-rolled 2B surfaces, bright finish stainless steel foil combines the corrosion resistance and high strength characteristics of stainless steel with an excellent appearance. The surface is free of oxidation, has low roughness, and high cleanliness, allowing for direct use without additional pickling and passivation; it utilizes mature steel grades such as 304, 301, and 430, adapting to the needs of high-end manufacturing in multiple fields.

1. Excellent Surface Texture: Using a hydrogen-nitrogen mixed atmosphere protection treatment process, the surface exhibits a uniform mirror-like gloss, providing a simple, elegant, and textured visual effect; some models can be customized with oleophobic and hydrophobic anti-fingerprint treatment, making daily cleaning convenient and meeting the appearance design requirements of high-end products.

2. Stable Physical and Chemical Properties: Through protective atmosphere processing, the formation of oxide scale is effectively prevented, and there is no iron powder or impurity precipitation on the surface. The cleanliness meets the requirements of demanding applications such as medical and semiconductor industries; the dense surface structure further enhances resistance to pitting and crevice corrosion, adapting to various complex working conditions.

3. Good Processing Adaptability: Relying on Qihong's independently developed precision rolling technology, the foil thickness tolerance can be strictly controlled within ±0.002mm, and the sheet shape is flat without wavy edges; the material is mostly in an annealed soft state with excellent ductility, easily adapting to forming processes such as deep drawing and stretching, while also meeting the needs of precision etching, laser cutting, micro-welding, and other fine processing, effectively reducing various defects during the processing.

Typical Application Scenarios

● Consumer Electronics: Suitable for camera decorative rings, button springs, internal reflectors, and ultra-thin heat sinks of mobile phones/laptops, as well as smart watch cases and strap connectors, significantly improving product texture and service life. ● Medical Device Field:  Suitable for components such as injection needle sheaths, surgical blade substrates, and bioreactor linings, perfectly meeting the core requirements of high cleanliness and easy sterilization in medical applications.

● New Energy and Semiconductor Fields:  Suitable for fuel cell bipolar plates (effectively reducing contact resistance) and semiconductor photomask substrates, meeting the stringent standards of high precision and high conductivity required in high-end manufacturing.

● High-End Decoration Field: Can be used to manufacture elevator decorative strips, luminous sign light guide plates, watch dials, jewelry bases, etc., highlighting the luxurious style and design of the products with its high-gloss texture.

Core Specifications and Parameters

Common Materials: 304 (SUS304), 301 (SUS301), 430 (SUS430);

Thickness Range: 0.02-0.05 mm (customization available);

Width Range: 5-650 mm (high slitting precision, controllable error);

Surface Treatment: BA (Bright Annealing), EP (Electropolishing), Mirror Finish (No.8);

Hardness Grade: Soft (Annealed), 1/4H, 1/2H (adjustable according to customer needs);

Applicable Standards: ASTM A666, JIS G4304, GB/T 4238.

Qihong Supply Guarantee

Ningbo Qihong Stainless Steel is equipped with sophisticated production equipment and a complete management system. Using bell-type or continuous bright annealing lines, precise temperature control and atmosphere regulation ensure that each roll of foil has a uniform and consistent gloss, without obvious color differences or oxidation spots. The slitting and packaging workshops meet dust-free standards, and anti-static gloves and clean packaging materials are used throughout the process to effectively prevent surface scratches and contamination, ensuring the product is delivered in perfect condition.

The company has passed ISO 9001 quality management system certification, and its products comply with RoHS and REACH environmental directives. Medical-grade products can provide authoritative biocompatibility test reports. Each batch of products comes with a material certificate and surface roughness test report, ensuring traceable quality. We have also assembled a team of professional engineers to provide customers with surface selection recommendations, processing technology optimization guidance, and support for small-diameter sample production, assisting customers throughout the entire process to achieve efficient production.