Ultra Thin Stainless Steel Coil
Company Overview
We are a manufacturer of precision stainless steel strip and ultra-thin stainless steel foil used in industrial applications requiring stable dimensional control, consistent mechanical performance, and controlled surface quality.
Our production system is designed for repeatable industrial supply and integrates cold rolling, controlled bright annealing (BA), precision slitting, and full in-line inspection.
We supply materials to OEM and industrial manufacturing customers in electronics, automotive, energy storage, and medical device supply chains.
Manufacturing
Our production system is built for stable and repeatable coil-to-coil manufacturing.
Core Manufacturing Equipment:
- Multi-pass precision cold rolling mills
- Automatic Gauge Control (AGC) system
- In-line laser thickness measurement system
- Controlled atmosphere bright annealing furnace
- Precision slitting lines (minimum width 5 mm)
- Automated Optical Inspection (AOI) system
What this means in production:
- Thickness is controlled continuously during rolling (not post-adjusted)
- Surface defects are detected before slitting and packaging
- Each coil is produced under batch-controlled process conditions
- Material identity is maintained through heat-number traceability
Quality System, Inspection & Verification
Each coil is produced under a traceable batch system.
Traceability Coverage:
- Raw material heat number
- Production batch ID
- Rolling and annealing process record
- Mechanical and chemical test results
Standard Documents Provided per Shipment:
- Mill Test Certificate (MTC)
- Chemical composition report
- Mechanical property report
- Coil inspection record
Third-Party Verification:
Independent inspection (SGS / BV or equivalent) can be arranged before shipment when required by the buyer.
Production Capability & Supply Reality
Production mode
Continuous coil-to-coil manufacturing
Delivery time
Typically 7–30 days depending on specification complexity
Supply structure
OEM orders / repeat orders / long-term agreements (LTA)
Order nature
Batch-based industrial supply rather than spot trading
Product Specifications
|
Item |
Specification |
|
Material Grades |
304, 316L, 301, 201, 430, customized alloys |
|
Thickness Range |
0.02 mm – 1.0 mm |
|
Width Range |
5 mm – 600 mm |
|
Thickness Tolerance |
±1–3 μm (precision), ±1–10 μm (standard) |
|
Surface Finish |
2B, BA, No.4, Mirror |
|
Surface Roughness |
Ra ≤ 0.1 μm (BA / mirror condition) |
|
Hardness |
HV 150 – HV 600 |
|
Coil Weight |
50 – 2000 kg |
Mechanical Performance
- Stainless steel 304 (annealed): Elongation ≥ 40%
- Stainless steel 301 (work-hardened condition): Elongation up to ≥ 50%
- Designed for high-speed stamping, deep drawing, and continuous forming processes
Application Industries
Electronics & Precision Components
- EMI shielding components
- Connectors and terminals
- Precision contact elements
Automotive Industry
- Sensor components
- Sealing and gasket parts
- Structural precision components
EV & Energy Storage Systems
- Battery structural parts
- Conductive connectors and busbars
- Fuel cell bipolar plates
Medical Device Manufacturing
- Surgical instruments
- Endoscopic components
- Precision tubing and housings
Market Experience
Our materials are used in industrial supply chains across:
Asia (Japan, South Korea, Southeast Asia)
Europe (Germany, Italy, Eastern Europe)
North America (United States, Mexico)
We supply to OEM manufacturing chains in electronics, EV components, and precision stamping industries.
Quality Standards & Compliance
- ASTM A240
- JIS G4305
- EN 10088
- ISO 9001 Quality Management System
Available Upon Request:
- RoHS compliance documentation
- REACH compliance statement
Packaging & Logistics
- Anti-rust VCI paper protection
- Moisture-resistant film wrapping
- Wooden pallet / export-grade wooden case
Optional:
- Vacuum packaging for ultra-thin or mirror-finish coils
Shipping:
- Sea freight (FCL / LCL)
- Air freight (samples / urgent orders)
- Railway transport (Europe–Asia routes)
Commercial Terms
MOQ: ~1 ton for standard grades
Trial orders: Negotiable based on specification
Payment: T/T, L/C at sight (qualified buyers)
Incoterms: FOB / CIF / CFR available
Samples: Available for stamping and validation testing
Quality Risk Control
Industrial supply stability is ensured through:
Batch-level traceability for every coil
Pre-shipment inspection control (internal or third-party)
Mechanical property verification per production batch
Surface defect screening before packaging
RFQ / Engineering Support
To provide accurate quotation and technical evaluation, please share:
- Material grade
- Thickness and width
- Hardness requirement
- Application environment
- Estimated annual demand
Our engineering team will respond with:
- Technical feasibility review
- Recommended specification option
- Commercial quotation
FAQ
Q: Are your materials accompanied by official quality certifications?
A: Absolutely. Every single shipment is accompanied by an official Mill Test Certificate (MTC) complying with EN 10204 3.1. This certificate details the exact chemical ladle analysis, mechanical properties (tensile strength, yield strength, elongation, and hardness), and the raw material melt-heat number, ensuring 100% downstream traceability.
Q: How do you guarantee thickness consistency across an entire ultra-thin coil?
A: We eliminate gauge variations through a closed-loop system. Our production lines combine a 20-high cold rolling mill with a dynamic Automatic Gauge Control (AGC) system and real-time laser sensors. This allows us to maintain a precision tolerance of +/- 1 um for ultra-thin foils, ensuring zero gauge drift from the first wrap to the last.
Q: Can you provide custom edge processing for continuous stamping lines?
A: Yes. Beyond standard Slit Edges, we operate specialized finishing lines to provide Deburred Edges and Round Edges. This is critical for customers running continuous high-speed stamping, as it removes micro-burrs, prevents strip breakage, and significantly extends the lifespan of your stamping dies.
Q: How do you manage the risk of oil stains or surface defects on Bright Annealed (BA) coils?
A: Our annealing furnaces use a 100% controlled hydrogen/nitrogen atmosphere to eliminate scaling and oxidation. Post-rolling, the strips pass through an in-line degreasing unit followed by an Automated Optical Inspection (AOI) system. Any micro-defect or surface variation is electronically tagged, ensuring that only pristine, compliant material is slit and packed.
Q: We need materials with customized mechanical properties. Can you adjust the tensile strength or hardness?
A: Yes. We do not just supply standard tempers. By precisely matching the cold-reduction ratio with customized annealing temperature profiles, we can tailor the hardness within HV 150 to HV 600 and optimize elongation (e.g., Grade 301 elongation >= 50% under specific work-hardened conditions) to suit your deep drawing or spring-back requirements.
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