Ultra Thin Stainless Steel Foil

1. Brand & Production Strength

Located in Ningbo High-Tech Zone, QIHONG is a professional precision stainless steel processing enterprise focusing on high-standard stainless steel coils, strips and customized Ultra Thin Stainless Steel Foil. Our factory is equipped with full sets of precision rolling equipment, continuous annealing devices and professional testing instruments, building a full-link quality management system that covers raw material screening, in-process production monitoring and finished product sampling inspection.

We support customized processing of 200, 300 and 400 series stainless steel including 304, 316L, 301, 430 and 904L. Different from trading enterprises, we complete all production and processing independently without outsourcing. Relying on years of precision metal rolling experience, we can flexibly adjust product thickness, width, surface finish and hardness to meet personalized customization needs of global industrial customers, with stable quality and controllable delivery cycle.

2. Verified Product Specifications & Core Parameters

All product parameters are measured and verified by professional testing equipment, with true and effective data supported by professional equipment testing and on-site verification. Our core advantage lies in the stable mass production of 0.008mm ultra-thin specification, which is far ahead of the 0.02mm stable production threshold of most manufacturers. The complete product parameters are shown in the table below:

3. Real-Scene Performance Test Results

To ensure product adaptability for global industrial scenarios, we conducted a 4-month uninterrupted cyclic industrial test on 0.008mm 316L ultra-thin stainless steel foil, taking the common 0.03mm commercial stainless steel foil as the control group. All test data are recorded on-site without data optimization or false publicity, ensuring true, accurate and authoritative product performance data.

3.1 Dimensional Stability & Processing Adaptability

The 0.008mm ultra-thin foil achieves ultra-low flatness deviation of only 3.8μm, 70% lower than ordinary thick foil products. The overall thickness tolerance is strictly controlled within ±0.0005mm, with no local thinning or thickness fluctuation during long-term coiling and cutting. It effectively solves the problems of uneven coating and poor assembly consistency in precision production, and is very suitable for automated micro-processing of high-end precision parts.

3.2 Mechanical Toughness & Fatigue Resistance

Through segmented low-temperature stress relief annealing process, the ultra-thin foil eliminates internal metal stress. The finished product can withstand 200,000 times of reciprocating bending tests without cracking or fracture. Despite the ultra-thin specification, it maintains stable tensile strength, supporting laser cutting, micro stamping, glue coating and other secondary processing, adapting to the frequent folding and assembly requirements of flexible electronic equipment.

3.3 Corrosion Resistance & Environmental Adaptability

The 316L ultra-thin foil passed 500-hour neutral salt spray test with no rust or oxidation discoloration. It can operate stably in humid medical environments, coastal high-salt environments and long-term outdoor working conditions, effectively resisting weak acid, alkali and chloride corrosion, ensuring long service life of terminal products.

3.4 Electromagnetic Shielding & Heat Dissipation Performance

In the 100MHz–3GHz universal frequency band, the product’s electromagnetic attenuation reaches 48–55dB, with shielding performance significantly better than traditional aluminum foil materials. The ultra-thin and high-density structural design increases the effective heat dissipation area by 65% in limited space, improving the heat exchange efficiency of micro heat sink components by 32%, which can effectively solve the heat dissipation and anti-interference problems of miniature precision electronic equipment.

4. Mature Production Process System

The stable mass production of 0.008mm ultra-thin stainless steel foil relies on our mature full-chain production process. Every link from raw material entry to finished product delivery has standardized operating specifications and inspection standards to ensure stable batch quality:

First, we select low-impurity high-quality stainless steel slabs and conduct strict impurity element detection to eliminate raw material quality risks. Second, we adopt 18-pass gradual precision cold rolling to steadily thin the material to the 0.008mm standard thickness. Then, gradient temperature annealing is carried out to release internal stress and prevent product warping and deformation. After finishing, we provide customized surface treatment and burr-free precision slitting according to customer needs. Finally, each batch of products will undergo sampling inspection of thickness, flatness, salt spray resistance and fatigue performance before delivery to ensure 100% qualified delivery.

5. Overseas Practical Application Verification

Our 0.008mm ultra-thin stainless steel foil has been stably exported to Europe, America, South Korea and other countries and regions, and has been practically verified by many overseas high-end manufacturing enterprises, with stable performance and good market feedback:

European Wearable Electronics Industry : Used for electromagnetic shielding of foldable wearable devices. The ultra-thin specification saves 0.22mm internal assembly space for terminal products, effectively optimizing battery layout. The excellent anti-interference performance helps products pass EU CE and FCC electromagnetic certification smoothly, and has maintained stable bulk supply for 12 months with zero quality complaints.

Korean Medical Precision Industry : Applied to micro sensor lining and disposable medical precision gaskets. The product’s ultra-high dimensional accuracy adapts to 0.1mm micro assembly gaps, and its stable corrosion resistance avoids body fluid erosion, meeting international medical biocompatibility standards. It has become a designated stable supply material for local medical precision manufacturers.

American New Energy Miniature Battery Industry : Used for micro battery heat dissipation components. The high thermal conductivity and uniform thickness solve the problem of uneven heat dissipation of ultra-compact batteries, effectively reducing the product defective rate and greatly improving the stability and service life of miniature drone and smart home batteries.

6. Core Competitive Advantages

First, we have industry-leading ultra-thin processing capability, realizing stable mass production of 0.008mm stainless steel foil, breaking the mass production bottleneck of most peers. Second, all performance data is derived from real industrial tests, with authentic and traceable test reports, meeting international industrial product credibility and quality evaluation standards. Third, relying on our own factory’s full independent production mode, we avoid intermediate links, with more controllable quality and delivery cycle. Fourth, we support full-dimensional customized services of grade, size, surface and hardness, covering small-batch trial orders and large-batch mass orders. Fifth, strict batch inspection standards ensure low tolerance and high stability of products, solving the precision material pain points of high-end global manufacturers.

7. Applicable Industries & Customers

This series of ultra-thin stainless steel foil is suitable for global precision manufacturing enterprises with high requirements on material thickness, precision and stability, mainly including: new energy miniature lithium battery manufacturers, foldable screen and 5G precision electronic supporting factories, medical micro sensor and precision component manufacturers, aerospace ultra-light shielding material suppliers, and precision mold and micro instrument processing enterprises.

8. Common Customer FAQs

Q1: Can 0.008mm ultra-thin stainless steel foil be mass-produced stably with qualified consistent thickness?

A: Stable batch production is fully achievable. We adopt customized 18-pass ultra-thin rolling production lines, equipped with real-time online thickness monitoring equipment. The thickness tolerance of finished products is steadily controlled within ±0.0005mm, with flatness index far higher than industry standards. Each coil is attached with detailed test data before delivery to ensure consistent quality of bulk goods.

Q2: Is the 0.008mm ultra-thin foil prone to damage during processing?

A: No. After professional low-temperature stress relief annealing treatment, the internal stress of the foil is completely released. The product has good toughness and structural stability, and can withstand long-term bending, laser cutting, micro stamping and glue coating processing. Conventional industrial standardized operation can complete all processing procedures smoothly without cracking or brittle damage.

Q3: What is the core difference between QIHONG’s ultra-thin foil and other ordinary thin stainless steel materials?

A: Most manufacturers can only stably produce stainless steel foil above 0.02mm, while we realize stable mass production of 0.008mm ultra-thin specification with tighter tolerance, better flatness and stronger environmental corrosion resistance. As a professional manufacturer with independent factories and production lines, rather than a middleman supplier, we can provide targeted customized solutions with shorter delivery cycles and more cost-effective bulk prices.

9. Choose QIHONG

As a reliable precision metal processing manufacturer based in China, QIHONG has long focused on the R&D and production of high-precision ultra-thin stainless steel foil. Relying on professional factory production strength, real industrial test data and mature customized service system, we provide high-quality, stable and verifiable ultra-thin metal material solutions for global high-end precision manufacturing industries. All products pass strict factory inspection and support complete certification reports. Welcome global customers to consult for free samples and professional technical customization solutions.